Dr. Joseph Mwanzia Nguta is a Veterinary surgeon by training and Pharmacologist and Toxicologist by specialization. He is a Senior Lecturer at the Department of Public Health, Pharmacology and Toxicology (PHPT), University of Nairobi with fourteen (14) years’ experience in undergraduate and postgraduate teaching and supervision. He holds MSc and PhD qualifications in natural product Pharmacology and toxicology from the University of Nairobi.



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K, G, T M, J N, MO O.  2022.  Studies on the ethnopharmacology, antimicrobial activity, and toxicity of Catha edulis (Vahl.) Endl., in Sprague Dawley rats. ([version 1; peer review: awaiting peer review]. F1000 Research 2022, 11:286):
Ali, H, Nguta J, Musila F, Ole-Mapenay I, Matara D, Mailu J.  2022.  Evaluation of Antimicrobial Activity, Cytotoxicity, and Phytochemical Composition of Ocimum americanum L. (Lamiaceae). Evidence-Based Complementary and Alternative Medicine. 2022:11.


Ali, HM, Nguta JM, Mapenay IO, Musila FM, Vincent OM, Nyak DM.  2021.  Ethnopharmacological uses, biological activities, chemistry and toxicological aspects of Ocimum americanum var. americanum (Lamiaceae). The Journal of Phytopharmacology. 10(1):56-60.
Matara, DN, Nguta JM, Musila FM, Mapenay IO, Ali HM, Omambia VM.  2021.  Botanical description, ethnomedicinal uses, phytochemistry and pharmacological effects of Croton dichogamus Pax (Euphorbiaceae). . The Journal of Phytopharmacology. 10(1):42-47.
Omambia, VM, Nguta JM, Mitema ES, Musila FM, Nyak DM, Ali HM, Gervason MA.  2021.  Ethnopharmacology, pharmacological activities, and chemistry of the Hypericum genus. The Journal of Phytopharmacology. 10(2):105-113.
Matara, DN, Nguta JM, Musila FM, I M.  2021.  Phytochemical analysis and investigation of the antimicrobial and cytotoxic activities of Croton dichogamus Pax crude root extracts. Evidence-Based Complementary and Alternative Medicine. 2021:9.


Gakuya, DW, Okumu MO, Kiama SG, Mbaria JM, Gathumbi PK, Mathiu PM, Nguta JM.  2020.  Traditional Medicine in Kenya: Past and current status, challenges and the way forward. Scientific African . :pp.1-7.Doi:


Nguta, J.M., 2019.  2019.  Nitrate Poisoning due to Ingestion of Cabbages (Brassica oleraceae var. capitata L.) (Brassicaceae) in Kitui County, Kenya. The Scientific World Journal. 2019:pp.1-5.
T.N. Mudimba..  2019.  Traditional uses, phytochemistry and pharmacological activity of Carpobrotus edulis: A global perspective. . The Journal of Phytopharmacology. Volume 8 Issue 3, 2019 (pp. 33-40):pp.33-40.


Chalo, DM, Lukhoba CW, Dossaji, S. F..  2017.  Antimicrobial activity, toxicity and phytochemical screening of selected medicinal plants of Losho, Narok County, Kenya. . Journal of Natural Product Biochemistry. Vol 15((1)):pp.29-43.
Musila, FM, Lukhoba CW, Dossaji SF.  2017.  Antibacterial and antifungal activities of 10 Kenyan Plectranthus species in the Coleus clade.. Journal of Pharmacy Research. Vol. 11,(Issue 8):pp1003-1014.
Musila, F.M., Lukhoba CW, Dossaji SF.  2017.  Phylogeny of ten Kenyan Plectranthus species in the coleus clade inferred from leaf micromorphology, Rbcl and MatK genes.. Journal of Botany, . (Vol. 2017),:pp.1-16..


Muema, E, Kinyanjui P, Mbaria J, Nguta J, Chepkwony S, Kamau J, Onkoba N, Nyachieo A.  2016.  Toxicity and Safety of Khat (Catha edulis) consumption during pregnancy using Olive Baboons (Papio anubis) as experimental models: A Prospective Randomised Study. Greener Journal of Epidemiology and Public Health. 4(3):61-70.
Musau, JK, Mbaria JM, Nguta JM, Mbaabu M, Kiama SG.  2016.  Evaluation of genotoxicity potential of plants traditionally used for mosquito control in Kenya’s South coast. Merit Research Journal of Medicine and Medical Sciences. 4(4):178-182.
Musau, JK, Mbaria JM, Nguta JM, Mbaabu M, Kiama SG.  2016.  Mosquito repellency and knockdown effect of a plant based formulation. IOSR Journal of Pharmacy. 6(5):09-14.
Omwenga, I, Kanja L, Nguta JM, Mbaria JM, Irungu P.  2016.  Organochlorine pesticide residues in farmed fish in Machakos and Kiambu counties, Kenya.. Cogent Environmental Science. . 2(1153215.)
Njenga, D, Irungu B, Mbaria J, Mutai C, Nguta J.  2016.  Antiplasmodial activity, cytotoxicity and acute toxicity of Zanthoxylum Chalybeum Engl. World Journal of Pharmacy and Pharmaceutical Sciences,. World Journal of Pharmacy and Pharmaceutical Sciences,. 5(11), :208-217..
Nguta, JM, Appiah-Opong R, Nyarko AK, Yeboah-Manu, D., Addo GA, Otchere, I., Kissi-Twum A.  2016.  Antimycobacterial and cytotoxic activity of selected medicinal plant extracts.. Journal of Ethnopharmacology. 182, :10–15..
Nguta, JM, Appiah-Opong R, Nyarko AK, Yeboah-Manu D, Addo, G.A., Otchere ID, Kissi-Twum, A..  2016.  In vitro antimycobacterial and cytotoxic data on medicinal plants used to treat tuberculosis.. Data in Brief. 7 (2016) (7 (2016) ):1124-1130.
Appiah-Opong R., NyarkoA.K., Yeboah-Manu D, Addo GA, Otchere ID, Kissi-Twum A.  2016.  In vitro antimycobacterial activity and toxicity of eight medicinal plants against pathogenic and non-pathogenic mycobacterial strains.. . International Journal of Mycobacteriology,. 5(5 (2016) ):S106-S107.


Mwangi, GG, Wagacha JW, Nguta JM, Mbaria JM.  2015.  Brine shrimp cytotoxicity and antimalarial activity of plants traditionally used in treatment of malaria in Msambweni district. Pharmaceutical Biology. 53(4):588-593.
Njenga, D, Irungu B, Mbaria J, Mutai C, Nguta JM.  2015.  Antiplasmodial, Cytotoxic and Acute Toxicity Activities of Vernonia lasiopus O. Hoffman. African Journal of Pharmacology and Therapeutics. 4(1):16-20..
Nguta, JM, Appiah-Opong, Nyarko AK, Yeboah-Manu D, Addo GA.  2015.  Medicinal plants used to treat TB in Ghana. International Journal of Mycobacteriology. 4:116-123.
Nguta, JM, Appiah-Opong, Nyarko AK, Yeboah-Manu, D., Addo GA.  2015.  Current perspectives in drug discovery against tuberculosis from natural products. International Journal of Mycobacteriology. 4:165–183..

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