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OYOO PROFWANDIGASHEM. "The Dissipation behaviour of malathion and dimethoate from the garden pea plant (Pisum sativa).". In: Bull. Environ. Contam. Toxicol. 64, 339 - 367. Academic Press Elsevier. Int.; 2000. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Populations in nests of the termites Macrotermes jeanneli in Kenya.". In: J. Trop. Ecol. (1992) 8, 73-85. Academic Press Elsevier. Int.; 1992. Abstract
n/a
OYOO PROFWANDIGASHEM. "Use of Complexing Ligands in the Determination of Antimony and Tin by Atomic Absorption Spectrophotometry.". In: Talanta, 26, 333. Academic Press Elsevier. Int.; 1979. Abstract
n/a
OYOO PROFWANDIGASHEM, OYOO PROFWANDIGASHEM. "The effect of boiling on the removal of persistent malathion residues from stored grains.". In: J. Stored Products Res. 38,1-10. Academic Press Elsevier. Int.; 2002. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Genetically modified foods: Potential, Fate and Future in Developing Countries.". In: Science and Society. 4: 93-97. Academic Press Elsevier. Int.; 2005. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Distribution and dissipation of Carbofuran in a paddy field in the Kano Plain of Kenya.". In: Bull. Environ. Contam. and Toxic. 56 (4).pg. 584. Academic Press Elsevier. Int.; 1996. Abstract
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OYOO PROFWANDIGASHEM. "The Persistence of g-1,2,3,4,5,6-Hexachlorocyclohexane (g -HCH) in Tropical Soils in Kenya.". In: Isotope Techniques for Studying the Fate of persistent pesticides in the Tropics". IAEA-TECDOC-476, 77-82,. Academic Press Elsevier. Int.; 1988. Abstract
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OYOO PROFWANDIGASHEM. "DDT Persistence in a Tropical Climate.". In: Kenya Journal of Science and Technology. Series (A), (1984) 5, 31-44. Academic Press Elsevier. Int.; Submitted. Abstract
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OYOO PROFWANDIGASHEM. "The State of Chemical Pollution in Kenya.". In: Kenya Journal of Sciences and Technology, Series (A),. 11 (1-2): 18-33. Academic Press Elsevier. Int.; 1996. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Distribution of Cr, Pb, Cd, Zn, in Lake Victoria Sediments.". In: Bulletin of Enviromental Contamination and Toxicology (1989) 42 (6)807. Academic Press Elsevier. Int.; 1989. Abstract
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OYOO PROFWANDIGASHEM. "Induced Optical Rotation in Zinc(II) and Cobalt(II) Complexes Derived from 1,1,1-Tris- (aminomethyl) ethane and cis, cis-1,3,5-Triaminocyclohexane,.". In: Science and Technology Journal, 1980 Series A: 1 (1), 23-26. Academic Press Elsevier. Int.; Submitted. Abstract
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OYOO PROFWANDIGASHEM. "The fate and dissipation of surface applied 14 "C-DDE in a tropical soil.". In: J. Toxic and Environmental Chemistry 65, 9-16. Academic Press Elsevier. Int.; 1998. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Prospects for University- Industry Co-operation in Africa.". In: Ibid, 1990 1, 17. Academic Press Elsevier. Int.; 1990. Abstract
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OYOO PROFWANDIGASHEM, OYOO PROFWANDIGASHEM. "The Electric Dipole Moments of Monohalogen Derivatives of German.". In: Letters. 7, 71 (1971). Academic Press Elsevier. Int.; Submitted. Abstract
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OYOO PROFWANDIGASHEM. "The metabolism and distribution of [14C-phenyl]-ethyl arathion in a tropical soil under field conditions.". In: Toxicological and Environmental Chemistry, Vol. 69, 459-468. Academic Press Elsevier. Int.; 1999. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Lead Contamination in Street Soils of Nairobi City and Mombasa Island , Kenya.". In: Bull.Environ. Contamination and Toxicology;, 46: 782-789. Academic Press Elsevier. Int.; 1991. Abstract
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OYOO PROFWANDIGASHEM. "Some Group VB Chloride Complexes with Thiourea and N.N'-diethyldithioxamide.". In: Inorg. Nucl. Chemistry, 41 (7), 941. Academic Press Elsevier. Int.; 1979. Abstract
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OYOO PROFWANDIGASHEM. "Use and distribution of organochlorine pesticides in Africa.". In: Pure and Applied Chemistry 73 (7) 1147 - 1155. Academic Press Elsevier. Int.; 2001. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Water Pollution - Effect of Industrial and Sewage effluent discharged on the quality of Nairobi River Water.". In: Kenya Journal of Sciences, Series A 17 (1-2): 95-110. Academic Press Elsevier. Int.; 1995. Abstract
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OYOO PROFWANDIGASHEM. "Studies on biodegradation of 2,4-D and metribuzin in soil under controlled conditions.". In: Toxicol.72:504-513. Academic Press Elsevier. Int.; 2004. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "The persistence and Fate of malathion residues in stored beans (phaseolus vulgaris)and maize (zea mays),.". In: Pestic Science 46 215-220. Academic Press Elsevier. Int.; 1996. Abstract
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OYOO PROFWANDIGASHEM. "The Concentration of Heavy Metals: Manganese, Iron, Copper, Cadmium, and Lead in sediments from the Winam Gulf of Lake Victoria and Fish Bought in Mombasa Town Markets.". In: Kenya Journal of Sciences, Series A (Vol. 8 (1-2): 5-18. Academic Press Elsevier. Int.; 1987. Abstract
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OYOO PROFWANDIGASHEM. "Water quality issues in East Africa.". In: Academic Press Elsevier. Academic Press Elsevier; 2009. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM, OYOO PROFWANDIGASHEM. "The Adsorption/Desorption and Mobility of Cabofuran in a soil sample from Kenya.". In: Bull.Environ. Contamin. & Toxic. 56 (4) pg. 575. Academic Press Elsevier. Int.; 1996. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Determination of_-BHC (Lindane) in Breast Milk of Kenyan women.". In: Bull. Chem. Soc. Ethiopia. 2(1), 39-44. Academic Press Elsevier. Int.; 1988. Abstract
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OYOO PROFWANDIGASHEM. "National Standards and Environmental Pollution.". In: paper presented at a Seminar organized by Kenya Bureau of Standards on National Standards and Technology for Development. Hotel Oceanic, Mombasa , 1982. Academic Press Elsevier. Int.; Submitted. Abstract
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OYOO PROFWANDIGASHEM. "Impact of Industries on the environments. In Industries and Enforcement of Environmental Law in Africa.". In: Industry experts Review environmental practice. UNEP/UNDP 9 - 23. Academic Press Elsevier. Int.; 1998. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM, OYOO PROFWANDIGASHEM. "River Pollution in Developing Countries - A case study. Effects of Waste Discharges on quality of Ruiruaka River Waters in Kenya.". In: Bull Chem. Soc. Ethiop. 4((2) 89-103. Academic Press Elsevier. Int.; 1990. Abstract
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OYOO PROFWANDIGASHEM, OYOO PROFWANDIGASHEM. ""Transition Metal Complexes with Schiff Base Derivatives of 1,1,1-Tris-(aminomethyl)- ethane".". In: Inorg. Chem. 11, 1349(1972). Academic Press Elsevier. Int.; 1972. Abstract

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OYOO PROFWANDIGASHEM. "Review of Crystallographic and Molecular Structures of Complexes formed between N,N ' -dialkyloxamides, and N,N ' -dialkydithio-oxamides, dialkylmolonamides, N,N ' -dialkylsuccinamides, and Toluene, 3,4 dithiol with group VB and IV metal holides.". In: Pure and Appl. Chem, 71 (6) 1019 - 1024. Academic Press Elsevier. Int.; 1999. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
Oyoo GO, Genga EK, Otieno CF, Ilovi CS, Omondi EA, Otieno FO. "Clinical and socio-demographic profile of patients on treatment for osteoporosis in Nairobi, Kenya." East African Orthopaedic Journal. 2016;9(2). Abstract

Background: Osteoporosis is a chronic, progressive disease of multifactorial aetiology and one of the most common metabolic bone diseases worldwide. There is a paucity of data on osteoporosis in Africa as it’s generally thought not to affect the non-Caucasian population. We sought to describe the population with osteoporosis in a Nairobi rheumatology clinic.

Objective: To evaluate the clinical characteristics of patients with osteoporosis seen at a rheumatology clinic in Nairobi.

Methods: Clinical, with emphasis on musculoskeletal manifestations, treatment and selected comorbidities in 56 patients diagnosed with osteoporosis were followed up and evaluated in the Nairobi Arthritis Clinic.

Results: The age distribution was 31- 95 years with majority being above the age of 60 years at 71.5%. Majority were female (89.3%). The main musculoskeletal manifestations were polyarthralgia (30.4%) followed by lower back pain (19.6%) and pathological fractures (12.5%). The types of osteoporosis were grouped as primary (9%), secondary (44.6%) and post-menopausal (46.4%). The most common clinical association being rheumatoid arthritis (39.3%) followed by steroids therapy (25%). Other comorbidities included osteoarthritis, fibromyalgia, systemic lupus erythromatosus and diabetes. Seven study participants had history of fracture with lumbar spine fractures leading at 42.8%. None of the study participants were smokers. The number of patients on calcium supplements was at 71.4% and bisphosphonates was low at 32%.

Conclusion: The findings of this study from age to comorbidities on osteoporosis are in keeping with literature. The number of patients on bisphosphonates was low which differed from Western literature. Persons at increased risk for osteoporosis in this set-up include post-menopausal women with debilitating chronic illness causing reduced mobilization over time and presenting with bone pains.These patients should be investigated for osteoporosis and effective treatment administered early.

Keywords: Osteoporosis, Clinical profile, Nairobi, Kenya

OYOO PROFWANDIGASHEM. "River pollution in developing countries - A Case Study III: Effects of industrual discharge on quality of Ngong River waters in Kenya.". In: Bull. Chem. Soc. Ethiop. 5 (2) 49 - 64. Academic Press Elsevier. Int.; 1991. Abstract
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OYOO PROFWANDIGASHEM. ""Pollutants; Their Effects on Man, Vegetation and Material.". In: Post Kenya II 23 (). Academic Press Elsevier. Int.; 1975. Abstract
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OYOO PROFWANDIGASHEM. "The major environmental factors that influence rapid disappearance of pesticides from tropical soils in Kenya.". In: Toxic and Environ. Chem. 00, 1-37. Academic Press Elsevier. Int.; 2001. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "The Fate of 14C-DDT in Kenyan Tropical Soils,.". In: J. Env. Scie. Health (1994) B29 (i) 57-64. Academic Press Elsevier. Int.; 1994. Abstract
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OYOO PROFWANDIGASHEM. ""Interference Effects of Different Metal in the Atomic Absorption Spectrophotometry Determination of Chromium",.". In: Analytische Chemie, 296 135-139. Academic Press Elsevier. Int.; 1979. Abstract
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OYOO PROFWANDIGASHEM. "Determination of organochlorine pesticide residues in soil and water from River Nyando drainage system within Lake Victoria basin, Kenya.". In: Contam. Toxicol. 72: 335-343. Academic Press Elsevier. Int.; 2004. Abstract
The world is today faced with the global pandemic of HIV/AIDS that has evolved rapidly since it was first described. The pandemic has been termed the greatest development challenge for sub Saharan Africa and is rapidly evolving in the Asian continent. The pandemic ha had a significantly negative impact on individual families through loss of loved ones, communities by increasing the burden of caring for the ill, and countries through reduced productivity.     As we look forward to the 21st century, the human population is reminded that even in an age where drugs to treat most ailments are available, human behaviour and individual aspirations are critical in the control of disease. Factors that affect human and social behaviour, such as poverty, discrimination and disenfranchisement have to be addressed on a global basis if the HIV/AIDS epidemic is to be controlled. The HIV/AIDS epidemic presents special challenges and new frontiers for public health interventions and research. HIV/AIDS has revealed the gaps in the understanding of how human behaviour is motivated and how it can be changed.     In this publication we present a review of some of the programs that are specifically targeting the youth with HIV/AIDS prevention activities in the countries of   This publication records the stories of men and women in Eastern Africa, who have tremendous commitment to the work they do even with minimal resources, because they have a vision for the youth of the African continent. It is a story of innovation, creativity, determination and partnership between adults and youth, communities and governments, countries, aid agencies and NGOSs.
OYOO PROFWANDIGASHEM. "Organochlorine Pesticides: Curse or Blessing in Tropical Agriculture.". In: In "Environment and Development" Proc. 1996. The Kenya National Academy of Sciences, Public Lecture Series. Academic Press Elsevier. Int.; 1996. Abstract
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OYOO PROFWANDIGASHEM. "Mathane Emissions by Tropical Termites Feeding on Soil, Wood, Grass and Fungus Combs.". In: Kenya Journal of Sciences, Series A 8(1-2):19-25. Academic Press Elsevier. Int.; 1987. Abstract
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OYOO PROFWANDIGASHEM. "Effects of Chemical Events on Environment in Africa.". In: Pontifical Academy of Science's Study Week on "Chemical Events in the Atmosphere and Their Impact", November 1983, P.649-673. Academic Press Elsevier. Int.; Submitted. Abstract
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Oyoo.G.O, Wanjohi.W, H.M K, Ogutu.E, Radia.K, Mutei.T.M. "Prevalence of gastroduodenal lesions in chronic nonsteroidal anti-inflammatory drug users presenting with dyspepsia at the Kenyatta National Hospital.". In: ISSN.; 2014. Abstractprevalence_of_gastroduodenal2.pdf

Non-Steroidal Anti-
Inflammatory Drugs (NSAIDs) are
among the most widely prescribed and
used classes of drugs worldwide. They
are known to cause gastroduodenal
mucosal damage and can result in
ulcerations, upper gastrointestinal
bleeding, perforation and even death.
However, no local data exist to show the
prevalence.
Objectives: The main objective
was to determine the prevalence
of gastroduodenal lesions seen at
endoscopy and histopathology in
chronic NSAID users presenting with
dyspepsia at the Kenyatta National
Hospital.
Design: This was a hospital-based crosssectional
study.
Methods: Seventy patients aged
13 years and above, on NSAIDs for 4
weeks or more, and presenting with
dyspepsia were recruited and done
for endoscopies. Six biopsy specimens
were taken from each patient (2 from
each of the following sites: - corpus,
antrum and duodenum). One specimen
from each site was subjected to the
rapid urease test for H. pylori detection.
The remaining three were subjected to
histopathological evaluation.
Results: Forty male and 25 female
patients aged between 16-77 years, with
a mean age of 43.4 years were studied.
At endoscopy, only 10 (13.9%) patients
had normal gastroduodenal mucosa.
Gastritis was the most prevalent lesion
occurring in 50% of the patients. Peptic
ulcer disease had a point prevalence
of 30.5% (duodenal ulcers 22.2%, and
gastric ulcers 8.3%). Other lesions at
endoscopy were duodenitis 16.7%,
gastric erosions 5.6%, duodenal erosions
1.4% and hemorrhagic gastritis 1.4%.
At histopathology, only 5 (6.9%)
patients had normal gastroduodenal
mucosa. Chronic active gastritis was the
most prevalent lesion at 77.8%. Other
lesions were chronic gastritis 12.5%,
chemical gastritis 6.9%, duodenitis
41.7% and intestinal metaplasia 4.2%.
Prevalence of H. pylori in our study
population was 50%. There was no
association between the gastroduodenal
lesions and H. pylori infection.
Conclusions: There was a high
prevalence of gastroduodenal mucosal
lesions both at histopathology (93.1%)
and endoscopy (86.1%) in the chronic
NSAID users.

Oyoo.G.O, Odhiambo.J, Amayo.E. "An evaluation of quality of life in ambulatory patients with systemic lupus erythematosus attending rheumatology clinic in Kenyatta National Hospital.". In: ISSN.; 2014. Abstractan_evaluation_of_quality.pdf

Background: Systemic Lupus
Erythematosus (SLE) is a chronic
autoimmune disease that affects all
organs of the body. It is becoming
increasingly clear that SLE is not as rare
in Kenya as was previously thought. Due
to its chronicity SLE has been known to
affect the quality of life of those affected
by it. There is minimal data on SLE in
East Africa and especially in Kenya. The
quality of life of SLE patients in this
country has never been assessed.
Objectives: To document the quality
of life of patients with SLE in Kenyatta
National Hospital using LUPUS QOL
questionnaire. We also sought to correlate
HRQOL with duration of illness, drugs
used and age of the patient.
Design: This was a cross sectional study
done on patients attending Rheumatology
Clinic in Kenyatta National Hospital.
Methods: Patients who satisfy the ACR
criteria were consecutively recruited.
All patients with SLE attending the
clinic were included in the study.
Consent was obtained from the patients
after which their demographic data was
obtained. Patients were examined for
the presence of malar rash, discoid rash,
arthritis/athralgia, photosensitivity, CNS
symptoms, serositis and oral ulcers. The
patients then filled the LUPUS QOL
questionnaire. The information acquired
was then analysed using SPSS version
17.0 using student t test and regression
analysis. The quality of life was
calculated and then correlated with age,
duration of illness and drug management.
Results: Sixty two patients were analysed
(60 females 2 males). Mean age of the
population was 37.3 years (range 14-71
years). All patients had some level of
education with 61.3% of the population
having some form of secondary education.
Most patients 54.8% were married.
Mean age of diagnosis was 34.5 years
with mean duration of illness 1.5 years.
Majority (88.7%) had arthritis/ athralgia,
oral ulcers (62.9%), malar rash (59.7%),
photosensitivity (58.1%), serositis
(32.3%), CNS symptoms (27.4%) and
discoid rash (17.7%). Patients scored
globally low in all domains of LUPUS
QOL. Highest domain was planning
63.7 (29.3), emotional health 61.3 (26.5),
burden to others 58.9 (31.2), fatigue 57.5
(30.0), pain 56.6 (29.6), physical health
54.0 (23.3), body image 47.1 (24.2)
intimate relations 41.1 (38.4).The most
common drug in use in our population
was prednisone at 74.2%. This was
followed by HCQ at 69.4%, NSAIDS
54.8%, azathioprine 37.1%, methotrexate
22.6%, mycofenolate mofetil 8.1%, CCB
11.3%, cyclosporine 3.2%. HRQOL
correlated positively with advance in age
for the domains. Physical health, burden
to others, emotional health and fatigue.
There was no correlation between
HRQOL and duration of illness or drugs
used by the population.
Conclusion: The HRQOL of our SLE
patients was found to be low in all
domains and to correlate with advance
in age in the domains of physical health,
burden to others, emotional health and
fatigue. However there was no correlation
with duration of illness or the drugs used
by the patients

Oyoo.G.O, Genga.E. "Pulmonary manifestations in scleroderma: a review.". In: ISSN.; 2014. Abstractpulmonary_manifestations1.pdf

Background: Scleroderma is a chronic
multisystem autoimmune disease of
unknown aetiology. Scleroderma is
characterized by widespread obliterative
vasculopathy of small arteries and is
associated with varying degrees of tissue
fibrosis and multiple organ involvement.
Pulmonary disease is an important
component of SSc. It is estimated that
80% of patients with SSc have some
evidence of pulmonary disease. Systemic
sclerosis has the poorest prognosis
amongst rheumatology diseases with
the highest case-specific mortality of any
of the autoimmune rheumatic diseases
as well as causing major morbidity.
Objective: This article will review
pathogenesis, diagnosis and
management of pulmonary disease in
scleroderma.
Data source: Literature review of
relevant published literature from both
Africa and the rest of the world.
Data synthesis: The pathogenesis of
lung disease in scleroderma involves
a variety of pathways, including
immunological/inflammatory activation
and vascular injury. The primary
cytokines responsible for the disease
are unknown but it is postulated that it
involves a complex interplay between
inflammatory, B lymphocyte antibody
production, oxidative stress and fibrotic
pathways. This leads to the activation
of lung fibroblasts by inflammatory and
fibrotic mediators. Lung fibroblasts play
a central role in the deposition of excess
intracellular matrix. This inflammatory
response leads to fibrosis and occurs in
the setting of vascular derangements.
The most common symptoms are dry
cough and dyspnea on exertion. The
high morbidity and mortality seen in
SSc is generally attributed to the two
major pulmonary manifestations of the
disease: interstitial pulmonary fibrosis, or
interstitial lung disease, and pulmonary
arterial hypertension. Exertional dyspnea
and dry cough are the most common
presenting symptoms in patients
with SSc who develop pulmonary
involvement Algorithm of diagnostic
procedures in these patients does not
Department of Clinical
Medicine and Therapeutics,
College of Health Sciences,
University of Nairobi, Kenya
Corresponding author:
Dr GO Oyoo. Email:
geomondi@hotmail.com
Review Article
differ considerably from the procedures
of any other interstitial lung disease. At
the current time, cyclophosphamide
remains the best studied therapeutic
agent although alternatives are actively
being evaluated. The pathogenesis of
pulmonary disease in scleroderma is
still an enigma and is being actively
researched. This will advance our
understanding of the disease and ability
to care for these patients.
Conclusion: Pulmonary complications
are common in SSc and are the leading
causes of death. Careful evaluation
by the clinician is warranted to detect
the presence of an ILD and to select
patients appropriately for consideration
of therapy. It is a major clinical challenge
largely due to the enigma of the disease
pathology as well as limited therapeutic
options available. This is compounded
by the perceived lack of evidence for
clinical effectiveness of those treatments
that are currently in use. Clinical trials
are underway and offer hope for novel
approaches to this mysterious and
often devastating manifestation of
scleroderma.

Oyugi, Lutiali, Saka, Musumba. Au Sommet 3: Une approche Intégrée et communicative . Nairobi: Kenya Literature Bureau; 2005.
Oyugi J, Otieno-Ayayo ZN, Ochanda H. "The silver cyprinid Rastrineobola argentea as the main diet source for rearing Anopheles arabiensis mosquitoes." Journal of Mosquito Research. 2014;4 (17): 1-6.
Oyugi CCA. Bereavement Counseling for children . Nairobi: Uzima Press; 2007.
Oyugi CCA. "La mise en valeur du non-dit en classe du français langue étrangère.". In: L’enseignement du français dans le contexte multilingue estafricain et kenyan (Teaching of French in a multilingual context in East Africa and Kenya). Kenyatta University; Submitted.conference_presentation-_k.u..docxconference_presentation_2-_k.u..docxconcilier_formation_doc__ku.docx
Oyugi CCA. "Anxiety in the foreign language class." ATINER -Languages and Cultures in Contact and Contrast: Historical and Contemporary Perspectives. 2011;107:133-148.
Oyugi WO;, Leonard DK. "Procedures for decentralized programming, budgeting and work planning: Lessons from Kenyan mistakes.". 1985. AbstractWebsite

In 1980 Kenya's Ministry of Agriculture instituted a new Management Manual, designed to improve the quality of district participation in programme identification, budgeting and implementation. Despite the fact that the Manual drew on modern programme budgeting techniques and was based on several years' experience with the management of Kenya's multi-district Integrated Agricultural Development Project, the new procedures have not taken hold. This experience is analysed in order to suggest lessons for the reform of management procedures elsewhere in the developing world.

Oyugi C. "Authentic documents in the teaching and learning of a foreign language." USIU- Journal of Language, Technology & Entrepreneurship in Africa,. 2008;1(1):25-33.
OYUNGE MRMONAYOALBERTV. "Advertising of cigarettes in Jabalpur City (M.P) India "A dissertation for a post graduate Diploma in Marketing and Sales Management.". In: Bull. Int. Dairy Fed. 221:32-46. Elsevier; 2005. Abstract
PIP: The efficacy and complication rate of menstrual regulation with the hand-held Karman cannula was tested on 223 women with amenorrhea up to 56 days in the Dept. of Obstetrics and Gynecology, University of Nairobi, Kenya from October 1982-January 1983. 195 women had positive pregnancy tests, while menstrual regulation was done on the others because of concern over late menses. the procedures were done without anesthesia with a 50 ml vacuum syringe fitted with a self-locking plunger, a rubber adaptor and stop cock, 5-8 mm flexible plastic Karman cannula and a toothless volsellum, using hibitane solution and savlon antiseptic. The average procedure time was 7 minutes. Bleeding lasted over 1 week in 4%, total blood loss was over 50 ml in 3.1%, and immediate side effects were syncope in 1.3%, nausea and vomiting in 1.8% and pain in 5.4%. There were 2 (0.8%) cases of endometritis. In Kenya where 60% of all gynecological hospital admissions are for septic abortions, it is essential to provide safe termination as a backup for family planning method failures.
OYUNGE MRMONAYOALBERTV. "An introduction to business studies (An undergraduate text book) for students pursuing Bachelor of Education Degree (in process of writing manuscript).". In: Bull. Int. Dairy Fed. 221:32-46. Elsevier; 2005. Abstract
PIP: The efficacy and complication rate of menstrual regulation with the hand-held Karman cannula was tested on 223 women with amenorrhea up to 56 days in the Dept. of Obstetrics and Gynecology, University of Nairobi, Kenya from October 1982-January 1983. 195 women had positive pregnancy tests, while menstrual regulation was done on the others because of concern over late menses. the procedures were done without anesthesia with a 50 ml vacuum syringe fitted with a self-locking plunger, a rubber adaptor and stop cock, 5-8 mm flexible plastic Karman cannula and a toothless volsellum, using hibitane solution and savlon antiseptic. The average procedure time was 7 minutes. Bleeding lasted over 1 week in 4%, total blood loss was over 50 ml in 3.1%, and immediate side effects were syncope in 1.3%, nausea and vomiting in 1.8% and pain in 5.4%. There were 2 (0.8%) cases of endometritis. In Kenya where 60% of all gynecological hospital admissions are for septic abortions, it is essential to provide safe termination as a backup for family planning method failures.
Oyungu E, Kioy PG, Patel NB. "Proconvulsant effect of khat (Catha edulis) in Sprague dawley rats.". 2008. Abstract

Ethnopharmacological relevance: Catha edulis (khat) is a plant whose fresh young leaves are used by an estimated five million people in eastern Africa and the Arabian Peninsula as a drug of recreation. The fresh leaves and shoots are rich in cathinone, a psychostimulant with effects similar to those of amphetamines. Psychostimulants produce a dose-related excitation of the central nervous system which can lead to seizures and convulsions. However there are no reports on studies of the effect of this herb on brain excitability and seizures. This knowledge is useful for doctors who may prescribe drugs whose side effects include lowering seizure threshold because there could be additive proconvulsant effectamongkhat users. Aim of the study: to determined whether khat lowers pentylenetetrazole (PTZ) seizure threshold. Methodology: Male Sprague dawley rats were given fresh aqueous khat extract, old aqueous khat extract (3 g/kg bw), methylphenidate or saline and the timed intravenous (PTZ) seizure threshold test was used to study its effect on seizure threshold. Results: Fresh khat (3 g/kg) and methylphenidate (4 mg/kg) lowered PTZ seizure threshold. Conclusion: Khat lowers seizure threshold.

Oyungu E, Kioy PG, Patel NB. "Proconvulsant effect of khat (Catha edulis) in Sprague dawley rats.". 2008. Abstract

Ethnopharmacological relevance: Catha edulis (khat) is a plant whose fresh young leaves are used by an estimated five million people in eastern Africa and the Arabian Peninsula as a drug of recreation. The fresh leaves and shoots are rich in cathinone, a psychostimulant with effects similar to those of amphetamines. Psychostimulants produce a dose-related excitation of the central nervous system which can lead to seizures and convulsions. However there are no reports on studies of the effect of this herb on brain excitability and seizures. This knowledge is useful for doctors who may prescribe drugs whose side effects include lowering seizure threshold because there could be additive proconvulsant effectamongkhat users. Aim of the study: to determined whether khat lowers pentylenetetrazole (PTZ) seizure threshold. Methodology: Male Sprague dawley rats were given fresh aqueous khat extract, old aqueous khat extract (3 g/kg bw), methylphenidate or saline and the timed intravenous (PTZ) seizure threshold test was used to study its effect on seizure threshold. Results: Fresh khat (3 g/kg) and methylphenidate (4 mg/kg) lowered PTZ seizure threshold. Conclusion: Khat lowers seizure threshold.

Oyungu E, Kioy PG PNB. "Proconvulsant effect of khat (Catha edulis) in Sprague dawley rats." Journal of Ethnopharmacology. 2009;121(3):476-8.oyungu_et_al_j_ethnopharmacol_2009.pdf
Ozen OI, MORALIOGLU S, KARABULUT R, DEMIROGULLARI B, SONMEZ K, TURKYILMAZ Z, CAN BASAKLAR A, KALE N. "Surgical treatment of cervicofacial cystic hygromas in children." ORL. 2005;67:331-334. AbstractWebsite
n/a
Ozwara HS, Olobo JO, Irungu LW. "Evaluation of immune associated cells in lesions of L. major infected vervet monkeys (Cercopithecus aethiops)." African journal of health sciences. 1995;2(3):349-353. AbstractPubMed link

Vervet monkeys were used to characterize immune associated cell types recruited into lesion sites as a result of experimental primary and secondary infections with Leishmania major. A heavy cellular infiltration consisting primarily of CD8+ (cytotoxic/suppressor) T cells were observed in the lesions. A small number of B lymphocytes and NK cells were also stained. Changes in cell type populations observed in the lesions were similarly reflected in the draining lymph nodes. Studies from control sites in all the animals revealed the presence of CD8+ T cells both in the epidermis and dermal layers of the normal skin. B cells, CD16 (NK cells) and CD4 (helper T cells) positive cells were virtually absent in the normal skin. It was concluded that CD8+ T cells were the predominant cells in the lesions. It also appeared that similar cell types were restricting the parasites at the lesion site both in primary and secondary L. major infections in vervet monkeys.

O’Connell SA, Maturu BO, Mwega FM, Ndung’u N, Ngugi RW, Adam CS, Collier P. "Capital mobility, monetary policy and exchange rate management in Kenya.". In: Kenya Policies for Prosperity. Oxford University Press; 2010.

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