Principal Technologist

Dr. Nduhiu Gitahi holds a Doctor of Philosophy (PhD) in Immunology and is currently the Principal Technologist in charge of laboratories in the Department of Public Health Pharmacology and Toxicology, University of Nairobi. He has 15 years of professional experience in laboratory consultancy and is supervising 5 MSc students drawn from Kenya and Sweden. He has been very instrumental in the establishment of the Mycotoxin Research Center, a regional laboratory at the tail end of ISO 17025 certification for research and testing of mycotoxins in food and feeds.




Gitahi, JN, M.M G, P.B. G, T.W. G, A N.  2018.  Multidrug resistant Escherichia coli isolated from asymptomatic school going children in kibera slum, Kenya. African Journal of Bacteriology Research. 10(5):70-77.
Gitahi, N, Gicheru MM, Gathura PB, Karanja NK, Githinji WT, Nordin A.  2018.  Internalization of enteropathogenic human bacteria in lettuce and coriander plant tissue. ISABB Journal of Health and Environmental Sciences. Vol. 5(3):28-32.


Ogara, WO, Gitahi N, Mainga AO, Ongoro E.  2017.  Human carnivores conflict in Wamba District, Samburu County, Kenya. International Journal of Biodiversity and Conservation. Vol. 9(9):284-291.human_carnivore_conflic_in_wamba_samburu_county.pdf
Kang’ethe, EK, Gatwiri M, Sirma AJ, Ouko EO, Mburugu-Musoti CK, Kitala PM, Nduhiu GJ, Nderitu JG, JK Mungatu, Hietaniemi V, V Joutsjoki, Korhonen HJ.  2017.  Exposure of Kenyan population to aflatoxins in foods with special reference to Nandi and Makueni counties. Food Quality and Safety. 1 (2):131–137.
Kang’ethe, EK, H Korhonen, KA Marimba, G Nduhiu, JK Mungatu, Okoth SA, V Joutsjoki, LW Wamae.  2017.  Management and mitigation of health risks associated with the occurrence of mycotoxins along the maize value chain in two counties in Kenya. Food Quality and Safety,. 1(4):268–274.




Akale J.E., Maina C.W., Nduhiu. G., Mainga.A., J.K. M, Kang'ethe E. K..  2014.  Prevalence of Cryptosporidia in Dogs and cats from selected kernels and veterinary clinics in Nairobi, Kenya, 4 September 2014. Biennial Scientific Conference. , U.o.N CAVS04-3_abstract-cryptosporidia_in_dogs_2.pdf
J.M. Mbaria, J. Nduhiu, J.M. Kahunyo, J.N Ombui, J.M. Nguta, J.G. Nderitu.  2014.  Drug and chemical Residues in Camel Milk in Nanyuki, Kenya., 4 September 2014. 9th Biennial Scientific Conference. , U.o.N, CAVS, Faculty of Veterinary Medicineconference_paper2_september_4th_2014_1.pdf


Ogara, WO, G. N, Andanje SA, O. N, Mainga AO, Nduati DW.  2013.  One Health approach to an integrated ecosystem study, A case of human carnivore conflict in samburu county, Kenya., 2013. EAQUA. , Sportman Arms, Nanyuki, Kenya
Gathumbi J.K., Kanja L.W., Maitho T.E., Mbaria J.M., Nduhiu J.G., Gitau F.K., J.G. N, Lucy M.W, K. M.  2013.  Assessment of lead and copper in fish and soil sediments in Kirinyaga South District, Kenya. Journal of Applied Sciences in Environmental Sanitation. 8 (3):145-150.


Onono J.O, Ogara.W. O, Okuthe. S.O, J.G N, Mainga A.O, D. N.  2010.  Challenges of Camel production in Samburu District, Kenya.. Journal of Camelid science. 3:01-05.challenges_of_camel_production_in_samburu_kenya.pdf
Ogara, WO, Gitahi NJ, Andanje SA, Oguge N, Nduati DW, Mainga AO.  2010.  Determination of carnivores prey base by scat analysis in Samburu community group ranches in Kenya. African Journal of Environmental Science and Technology. 4(8):540-546.determination_of_carnivore_prey_base_by_scat_analysis_in_samburu_community_group_ranches_in_kenya.pdf


J, NG, Ombui JN, Nduati DW, Gicheru MM.  2009.  Genetic Characterisation of food borne Bacillus cereus strains from milk, cheese and rice by multiplex PCR assay. Inter J. of Integrative Biology. 5(2):82-86.
Wagate, CG, Mbaria JM, Gakuya DW, Nanyingi MO, Kareru PG, Njuguna A, Gitahi N.  2009.  Screening of some Kenyan Medicinal Plants for Antibacterial Activity. Phytother. Res, John Wiley & Sons, Ltd. 2866(1002):DOI:10.1002.screening_of_some_kenyan_medicinal_plants_for_bacterial_activity.pdf


O., OW, G. N, S.A. A, O. ON.  2008.  Determination of carnivore prey base in Samburu community group ranches byscat analysis, 17-19 september. 6th Biennial Scientific Conference. , University of Nairobi
C., WG, W. GD, O. NM, K. NF, G. N, M. MJ.  2008.  Antibacterial and cytotoxic activity of some Kenyyan medicinal plants., 17-19 september. 6th Biennial Scientific Conference.
G., N.  2008.  Laboratory aspects of HIV/AIDS diagnosis and monitoring antiretroviral therapy., 9 April. , University of Nairobi


Ombui, JN, Nduhiu J.G., J.K. M.  2005.  Immunoassay and polymerase chain reaction techniques for detection of enterotoxigenic Bacillus cereus. E. Afr. Med. J.. 82(8):280–284.


J.N, O, Kimotho AM, Nduhiu. JG.  2000.  Antimicrobial resistance patterns and plasmid profiles of staphylococcus aureus isolated from milk and meat.. E. Afr. Med. J. . 77:463-468.
Kang’ethe, EK, Arimi SM, O. OA, J. MDJ, J.G N.  2000.  The prevalence of antibodies to Brucella abortus in marketed milk in Kenya and its public health implications. Read at 3rd All African conference on Animal Agriculture and 11th conference of the Egypt Society of Animal product held at Alexandria , 6th – 9th Nov.. 3rd All African conference on Animal Agriculture and 11th conference of the Egypt Society of Animal product. . , Alexandria Egypt
Arimi, SM;, Koroti E;, Kang'ethe EK;, Omore AO;, McDermott JJ;, Macharia JK;, Nduhiu JG;, Githua AM.  2000.   Arimi, S.M; Koroti, E; Kang'ethe, E.K; Omore, A.O; McDermott, J.J; Macharia, J.K; Nduhiu, J.G; Githua, A.M . Abstract

E. coli 0157:H7 is a newly recognised bacterial zoonosis that originates from the gut of infected cattle. It causes potentially fatal haemorrhagic enteritis, haemolytic uraemic syndrome and kidney damage in humans. Epidemiological data on E. coli 0157:H7 infection and transmission in developing countries remain scarce but it is suspected that consumption of unpasteurised milk is an important vehicle for its transmission to humans, as milk can easily be contaminated with cattle faeces during milking. Given the high proportion of informal sales of unpasteurized milk in many tropical countries, E. coli 0157:H7 has been one of several zoonoses of concern. Between January 1999 and January 2000, survey data and raw milk samples were collected seasonally from households consuming unpasteurised milk in rural and urban locations in central Kenya. Respondents were randomly selected within production system (extensive and intensive) and human population density (urban, peri-urban and rural) strata. Laboratory samples were assessed for bacteriological quality by total and coliform counts. Selective media were used sequentially to screen for faecal coliforms and E. coli 0157:H7. Suspect E. coli 0157:H7 colonies were also serotyped and tested for production of verocytotoxins. E. coli was recovered from 91 out of 264 samples (34%) and E. coli 0157:H7 serotype identified in two samples (<1%). One of the two isolates produced verocytotoxins. As in many studies, the recovery rate of this serotype was low, but the finding is significant from a public health perspective. Our consumer studies have shown that over 95% of consumers of unpasteurised milk boil the milk before consumption and potential health risks from this zoonosis are therefore quite low. As informal milk markets without pasteurisation technology are likely to remain dominant for the foreseeable future, there is the need to further emphasise the importance of boiling raw milk before consumption, especially among pastoral communities where this practice is not common

Aboge, GO;, Kang’ethe EK;, Arimi SM;, Omore AO;, McDermott JJ;, Kanja LW;, Macharia JK;, Nduhiu JG;, Githua A.  2000.  Antimicrobial Agents Detected In Marketed Milk In Kenya. Abstract

Drug residues in foods are a major public health concern in many countries, especially where most food sales bypass official quality assurance channels. In common with many tropical countries, sales of unpasteurized milk in Kenya account for over 85% of marketed milk. This milk is either sold directly from producers to consumers or via various cadres of informal market agents. Besides residues that may arise from lack of adherence to withdrawal times following cow therapy, there have been concerns that some antimicrobial agents may be added to informally marketed milk to extend its shelf life. As part of a large study to assess public health hazards associated with marketed milk, samples were collected seasonally between January 1999 and January 2000 from raw (unpasteurized) milk consuming households and informal market agents of various cadres. Pasteurised milk samples were also collected from retail points and tested for comparison. All samples were screened for antimicrobial residues using charm AIM-96 and Charm-ROSA (Charm Sciences Inc, USA) tests. The former detects a wide range of anti-microbials, and the latter detects β-lactams and tetracyclines specifically, at levels above maximum residue limits (MRLS) recommended by the European Union (EU). The Charm-AIM screening test showed that 9.4% and 5.7% of samples from consumer households and market agents had antimicrobial residues above EU MRLS, respectively. It was concluded that antimicrobial residues were more likely to have originated at farm-level than because of poor market handling practices.


3. Ombui J.N., J.M M, Kimotho A.M., J.K. M, Nduhiu J.G..  1996.  Frequency of antimicrobial resistance and plasmid profiles in Bacillus cereus strains isolated from milk.. Afr. Med. J.. 73:380-384.


Ombui, J., J.K. M, Nduhiu J.G..  1995.  Frequency of antimicrobial resistance and plasmid profiles of Escherichia coli isolated from milk.. E. Afr. Med. J. . 72:228-230..


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