Dr. Oyewusi, Joshua Adeoye obtained his first degree (DVM), MSc (Veterinary Pharmacology) and Ph.D (Veterinary Pharmacology) in 1995, 2009 and 2018, respectively from University of Ibadan. He worked as a contractor staff in the security dog section, Shell Pet. Development Company, Warri; as a Resident Veterinary Surgeon attached to Gan-Rovet
Nig. Ltd., Warri, Delta state (1995-1997). He practiced as a private Small Animal Clinician at Alpha Veterinary Clinic and Surgery, Ilorin, Kwara state (1997-2008).
He joined the FUNAAB Veterinary Teaching Hospital as a Veterinary officer (2008) and rose to the position of Principal Veterinary Officer I (2017). The Lecturing career of Dr. Oyewusi started in 2013 as an adjunct lecturer before he got appointed as a Lecturer I in the Department of Veterinary Physiology and Pharmacology, COLVET, FUNAAB. He has published about 49 journal articles in both local and foreign journals.
He is a Reader and has served in various committees both within and outside COLVET, FUNAAB. Dr Oyewusi was the Coordinator of Veterinary Services for the Veterinary Teaching Hospital, FUNAAB (2025 - 2026). He has attended several professional conferences both home and abroad during which he presented some his research outcomes
thus contributing to scientific knowledge.
Dr. Oyewusi is a Pastor in Deeper Life Bible Church. He love the company of the youth which influenced his decision to Pastor the youth at district and group of district levels at Deeper Life Bible Church, Warri and Ilorin, respectively (1995-2006). He is happily married with two children.
(a) Doctor of Philosophy 2018
(b) Fellow, College Veterinary Surgeon Nigeria 2018
(c) Masters of Science 2009
(d) Doctor of Veterinary Medicine 1995
(e) A Level Certificate 1988
(f) Ordinary Level Certificate 1985
Veterinary Pharmacology and Toxicology with special interest in Veterinary Ethnopharmacology
i. Member, Nigeria Veterinary Medical Association (NVMA)
ii. Member, American Chemical Society (ACS)
iii. Member, Nigerian Chemical Society (NCS)
iv. Member, Forum of Nigerian Toxicologists (FONTOX)
v. Member, Society for Medicinal Plants and Economic Development (SOMPED)
Oyewusi, A. J.,Oridupa, O.A., Saba, A. B. and Oyewusi, I. K. (2023): “Comperative in-vitro antioxidant studies of crude methanol extract and four solvent fractions of red cultivar Alliumcepa L. Bulbs”. Presented at the 7TH Annual Conference of The Society for Medicinal Plants and Economic Development (SOMPED),(August 29 -31, 2023).
58th Annual Congress of the Nigerian Veterinary Medical Association, on October24 – 28,2022 at Oyo State, Nigeria.
Eniseyin, F. O., Oyewusi, J. A., Abolaji, A. O., Salihu, T. M., Akande, F. A. and Adenubi, O. T. (2020): In vitroAcaricidal activity of aqueous and methanol extracts of red cultivar Allium cepaL. on engorged female
Rhipicephalus(boophilus)annulatus from naturally infested cattle. Presented at Forum of Nigerian Toxicologists Conference, March 11 -12, 2020 (FONTOX), University of Ibadan, Nigeria.
Oyewusi, J. A. (2013): Phytochemical, elemental and acute toxic effects of methanol extract of onion (Allium cepa) bulbs in experimentally treated wista albino rats. Presented at XXXVII (37th) Annual conference of the West African Society for Pharmacology (WASP), October 21 -24,2013, Lagos, Nigeria.
49th Annual Congress of the Nigerian Veterinary Medical Association, on November 5 – 9,2012 at Ekiti State.
Oyewusi, J. A., Otesile, E. B. andSadiq, N. A. (2011): Efficacy of Flumethrin Pouron against Ticks on N’Dama/Brown Cross cattle under Field Condition. Presented at the 48th Annual Congress of the Nigerian Veterinary Medical Association, November 21 – 25, 2011 at Ilorin, Kwara State,Nigeria.
Journals Articles in Print (Selected).
* (1)Oyewusi, J. A.,Ojie, J. E., Olasoju M. I. & Adekoya, O. A. (2026): Survey on allergic and anaphylactic reactions of dogs to some commercially available injectable multivitamin products in OgunState. Journal of Sustainable Veterinary and Allied Sciences.8 (2); 177-185,Published by College of Veterinary Medicine, Michael Okpara University of Agriculture, Umudike, Nigeria.Available online at http://doi.org/10.54328/covm.josvas.2026.314
* (2)Oyewusi, J. A.,Oridupa, O. A., Oluyemi O. M., Samuel, B. B., Lasisi, A. A. & Saba A.B. (2026): Anti-inflammatory effects of seven compounds isolated from the Ethyl acetate fraction of the extract of red cultivar Allium cepa L. bulb in Wistar rats. Nigerian Veterinary Journal.47(2); 1-16,Published by Nigerian Veterinary Medical Association. Letter of Acceptance dated April 16, 2026.
f*(3)Adekoya O. A, Adewuyi, G., Adenubi, O. T., Akande,F. &Oyewusi, J. A. (2026):In vitroAcaricidal efficacies of crude extract and fractions of Croton hirtus leaf against Cattle Babesial Vector Rhipicephalusannulatus. The Journal of Basic and Applied Zoology.87:34 (2026); 1-9.Availableonline: Springer https://link.springer.com › content› pdf. Index in Scopus.
*(4)Oyewusi, J.A.,Nureni, Z. A. & Adekoya, O. A. (2026): Anti-inflammatory effect of aqueous extract of Nigerian grown Ageratum conyzoides in Wistar Rats. Savanna Veterinary Journal.8 (2); 32-36, Published by Faculty of Veterinary Medicine, University of Ilorin. Available online: https//:doi.10.36759/svj.2025.292.
*(5)Alabi T.G., Ajayi F.O. & Oyewusi J. A. (2025): Effect of the Feed Inclusion of BiOWiSHMultiBio 3PS® on Water and Feed Consumption Rate, Growth Performance, Haematologic and Biochemical Parameters of Experimental Broiler Chickens in Nigeria. Nigerian Veterinary Journal.46 (2): 33-42, Published by Nigerian Veterinary Medical Assosiation. Available online: https://dx.doi.org/10.4314/nvj.v46i2.4.
*(6)Akintunde, O.G., Oyekan, K.U., Oladipo, T.M., Oyewusi, J.A & Ajayi, O.L. (2025):Hepatoprotective effect of ethanolic extract of TridaxProcumbens LINN againstparacetamol-induced hepatotoxic Rats by inhibiting inflammatory response. Journal of Natural Science, Engineering and Technology. 24: 1-13. Published by Federal University of Agriculture Abeokuta.
*(7)Adenubi, O.T., Olatubosun, O.G., Adekoya, O.A., Akande, F.A., Attama, S.C. & Oyewusi, J.A.(2023): In-vitro evaluation of the acaricidal efficacy of aqueous extract and essential oil of Mormodica: charantiaL. against Rhipicepalus (Boophilus) annulatusticks. Nigerian Veterinary Journal.43 (4): 24-35, Published by Nigerian Veterinary Medical Association. Available online at https://dx.doi.org/10.4314/nvj.v46i2.4.
*(8)Oyewusi, J. A.,Oridupa, O.A., Saba, A. B. & Oyewusi, I. K. (2022): Comparative in-vitro antioxidant studies of crude methanol extract and four solvent fractions of red cultivar allium cepa l. Bulbs. Nigerian Veterinary Journal.43 (3); 42-53, Published by Nigerian Veterinary Medical Association.Available online https://doi.org/10.4314/nvj.v43i3.4.
*(9)Adekoya, O.A., Adenubi, O.T., Olukunle, J.O., Ajayi, O.L. & Oyewusi, J.A. (2022):Ameliorative activities of Vernoniaamygdalinadelilemethanolic leaf extract in alloxan induced diabetic wistar rats. Journal of Natural Science, Engineering and Technology. 2022, 21(1&2): 1-19,Published by Federal University of Agriculture Abeokuta.
(10) Oyewusi, J. A.,Oridupa, O.A., Saba, A.B. & Oyewusi, I.K (2022): Comparative anti-inflammatory and analgesic effects of fractions of Allium cepa L. bulb red cultivar extracts in rats and mice. Journal of Sustainable Veterinary and Allied Sciences; 3 (3); 1-7, Published by College of Veterinary Medicine, Michael Okpara University of Agriculture, Umudike, Nigeria.
(11) Oyewusi, A. J., Eniseyin, F.O., Abolaji, A.O., Salihu, T., Akande, F.A. & Adenubi, O.T. (2021):In-vitroacaricidal activity of aqueous and methanol extracts of red cultivar Allium cepa L. on engorged female Rhipicephalusannulatus(Boophilus) from naturally infested cattle. Savannah Veterinary Journal.4 (2); 22-30, Published by Faculty of Veterinary Medicine, University of Ilorin, Ilorin, Nigeria.
(12) Oloye, A.A., Oyewusi, J.A.,Omidiji, M.A., Awoyomi, O.J., Olurode, S.A., Ola-Davis,O.E. & Oyeyemi, M.O.(2021): Effects of Spondiasmombin leaf extracts on testicular histology and semen characteristics of prepubertal (juvenile) Wistar rats. Savannah Veterinary Journal.4 (1); 29-35, Published by Faculty of Veterinary Medicine, University of Ilorin, Ilorin, Nigeria.
(13) Ajibola, E.S., Adebayo, O.O., Abakpa, S.A.V., Oyewusi, J.A., Adeleye, A.A., Makinde, F.A. & Hassan, O. (2021): A suspected case of digitalis toxicity secondary to therapeutic management of congestive heart failure in a boerboel dog. Nigerian Veterinary Journal42 (4); 273- 277, Published by Nigerian Veterinary Medical Association. Available online at https://dx.doi.org/10.4314/nvj.v42i4.2.
f(14)Oyewusi, J.A., Oridupa, A. O., Saba, A. B., Oyewusi, I. K & Olukunle, J. O. (2021): Anti-inflammatory and analgesic effects of methanol extract of red cultivar Allium cepabulbs in rats and mice. Journal of Basic and Clinical Physiology and Pharmacology.31 (2); 1-6,Published by Walter de Gruyter GmbH. https://www.ncbi.nlm.nih.gov/pubmed/31800393. (Indexed in Scopus, Scimago, PUBMED).
f (15)Oyewusi, I. K., Takeet, M. I., Oyewusi, J. A., Talabi, A. O., Sonibare, A. O. & Otesile, E. B. (2020): Response of three Nigerian breeds of sheep experimentally infected with Trypanosomavivax to diminazeneaceturate therapy. Folia Veterinaria.64(3); 13-21, Published by University of Veterinary Medicine and Pharmacy in Košice, Komenského, Slovakia.Available on line at https://www.researchgate.net/publication/347126453. DOI: 10.2478/fv-2020-0022.(Indexed in Scopus).
f(16)Oyewusi, I. K., Takeet, M I., Oyewusi, J.A.,Talabi A. O. & Otesile, E. B (2019): Molecular detection and haematological evaluation of trypanosomosis in naturally infected sheep in Abeokuta, Nigeria. Alexandria Journal of Veterinary Sciences.63(1): 129-134.Published by Faculty of Veterinary Medicine, Alexandria University, Egypt.Available online at https://www.researchgate.net/publication/337037622.(Indexed in Scopus).
f (17)Oyewusi J. A., Oridupa A. O., Saba A. B., Oyewusi I. K & Mshelbwala, M. F (2019): Effect of Methanol Extract of Red Cultivar Allium cepa L. on Serum Biochemistry and Electrolytes of Rats Following Sub-Chronic Oral Administration. Journal of Basic and Clinical Physiology and Pharmacology. 31 (2): 1-14.Published by Walter de Gruyter GmbH. https://www.ncbi.nlm.nih.gov/pubmed/31800393: DOI: 10.1515/jbcpp-2018-0175. (Indexed in Scopus, Scimago, PUBMED).
f (18)Oyewusi J. A., Oridupa A. O., Saba A. B., Olurode A. S., Oyewusi I. K., Olukunle J.O. & Adebiyi A. A. (2018): Testicular and spermatotoxic potential of methanol extract of red cultivar Allium cepa in rats. Journal of Complementary and Integrative Medicine.15 (4): 1-8, Published by Walter de Gruyter GmbH. Available online at https://www.degruyter.com/view/j/jcim.2018.15. DOI: 10.1515/jcim-2017-0102. (Indexed in Scopus, Scimago, PUBMED).
(19)Oyewusi J. A., Oridupa, O. A., Saba, A. B., Oni, O., Oyewusi, I. K. & Mshelbwala, M. F. (2017): Assessment of cardiotoxic potential of methanol extract of red cultivar Allium cepa. Sokoto Journal of Veterinary Sciences. 15 (3): 69-77. Published Faculty of Veterinary Medicine, UsmanuDanfodio University, Sokoto. Available online at http://www.sokvetjournal.net/.
f(20)Takeet, M.I, Oyewusi, J.A., Abakpa, S.A.V., Daramola, O.O & Peters, S. O. (2017): Genetic diversity among Babesiarossi detected in naturally infected dogs in Abeokuta, Nigeria, based on 18S rRNA gene sequences. ActaParasitologica. 62(1), 192-198. Published by Walter de Gruyter GmbH. Available online at https://www.researchgate.net/publication/312040235. DOI: 10.1515/ap-2017-0023. (Indexed in Scopus, Scimago)
f(21)Daramola, J.O., Adekunle, E.O., Oke, O.E., Onagbesan, O.M., Williams, T.J., Iyasere, O.S., James, I.J., Oyewusi, I.K. & OyewusiJ. A. (2017): Effects of pyridoxine in combination with different antioxidants on viability and oxidative stress parameters of cryopreserved goat buck semen. Archivos de Zootecnia. 66 (253): 15–21. Published by Universidad de Cordoba.Available online at https://dialnet.unirioja.es/descarga/articulo/5959608.pdf. (Indexed in Scopus)
f (22)Daramola, J. O., Oyewusi, J. A., Sorongbe, T. A., Adekunle, E. O., Iyanda, O. A., Onanuga, O. D., Olayemi, F. D., Falujo, F. D., Tanimowo, L. S., Omyema, P. O., Sobowale, O. A., Sodiya, O. O. & Salawu, D. O. (2017): Effects of mucuna seed extract on sperm functional integrities and seminal oxidative stress indices of vitrified goat semen. Journal of Agricultural Sciences.62(2): 155-166. Published by Faculty of Agricultural Sciences, Sabaragamuwa University of Sri Lanka.Aailable online at
www.doiserbia.nb.rs/img/doi/1450-8109/2017/1450-81091702155O.pdf. (Indexed in Scopus, SCimago)
(23)Amrevuawho, M. O., Akinyemi, A. A., Oyewusi, J. A., Bankole, O. M. & Ezeri, G. N. O (2016): Effects of Onions (Allium cepa) and Chloramphenicol on Haematology Parameters, Histopathology and Survival of Catfish Claris gariepinus (Burchell, 1822) sub-adult infected with Pseudomonas aeruginosa. Vom Journal of Veterinary Science.11 (1): 1-12. Published by Nigeria Veterinary Research Institute.
f (24)Daramola, J. O., Adekunle,E. O., Oke,O. E., Onagbesan,O. M., Oyewusi, I. K. & Oyewusi,J. A. (2016): Effects of coconut (Cocosnucifera) water with or without egg-yolk on viability of cryopreserved buck spermatozoa. Animal Reproduction.13 (2): 57-62. Published by ColegioBrasileiro de Reproducao Animal.Available online at www.cbra.org.br/portal/downloads/publicacoes.(Indexed in Scopus, SCimago).
f (25)Daramola, J. O., Adekunle, E. O., Onagbesan, O. M., Oke, O. E., Ladokun, A. O., Abiona, J. A., Abioja, M. O., Oyewusi, I. K., Oyewusi, J. A., Isah, O. A., Sogunle, O. M. & Adeleke, M. A. (2016): Protective effects of fruit-juices on sperm viability of West African Dwarf goat bucks during cryopreservation. Animal Reproduction.13 (1): 7-13. Published by ColegioBrasileiro de Reproducao Animal.Available online at www.cbra.org.br/portal/downloads/publicacoes. (Indexed in Scopus, SCimago)
(26)Oyewusi, J. A., Saba, A. B. & Olukunle, J. O. (2015): Phytochemical, elemental and acute toxic effects of methanol extract of onion (Allium cepa) bulbs in Wistar albino rats experimentaly pre-exposed and rested for a week. Vom Journal of Veterinary Science. 10: 65 – 74. Published by National Veterinary Research Institute.
f (27)Daramola, J. O., Adekunle, E. O., Oke, O. E., Onagbesan, O. M., Iyasere, O. S., Williams, T. J., James, I. J., Oyewusi, I. K. & Oyewusi, J. A. (2015): Effects of pyridoxine supplementation or in combination with other antioxidants on motility, in vitro capacitation and acrosome reaction of goat buck spermatozoa during cryopreservation. Small Ruminant Research. 131: 113–117. Published by Elsevier.Available online at https://doi.org/10.1016/j.smallrumres.2015.08.007.(Indexed in Scopus, SCimago).
(28) Olukunle, J. O, Jacobs E. B, Adeleye, E. O, Oyewusi, J. A. & Durotoye, L. A (2015):Effects of Aquoeus Leaf Extract of Acalyphawilkesiana on Semen Morphology and Characteristics in male Wistar Albino rats.Nigerian Journal of Animal Science.17 (2); 162-168, Published by Animal Science Association of Nigeria (ASAN).
(29) Olukunle J. O., Jacobs, E. B., Oyewusi, J. A., Durotoye, L. A. & Adeleye, E. O. (2015):Effects of Aqueous Leaf Extracts of Tithoniadiversifolia (Mexican Sunflower) on Semen Characteristics and Morphology in male Wistar albino rats.Nigeria Journal of Animal Production. 42 (2): 263-270. Published by Nigerian Society for Animal Production. www.ajol.info/index.php/njap.
(30) Olukunle, J. O., Sogebi, E. A. O. &Oyewusi, J. A. (2014): Anti-inflammatory and Analgesic Potential of Aqueous Leaf Extract of Tithoniadiversifolia Rodents. Journals of Natural Sciences, Engineering and Technology 13 (1): 82-90. Published by Federal University of Agriculture, Abeokuta. Available online at https://journal.unaab.edu.ng/index.php/JNSET/article/view/1495.
(31) Oyewusi, I. K., Anifowose, I.O., Famuyide, I. M., Oyewusi, J.A., Babatunde, B. A., Oguntusi, I. O. &Talabi, A. O. (2014). Effects of dermatophylosis on productivity of Cattle in a ranch in Abeokuta, Nigeria.Nigerian Journal of Animal Science.16 (2): 335-338, Published by official Animal Science Association of Nigeria (ASAN). Available online at https://www.ajol.info/index.php/tjas.
(32) Ajibola, E. S., Rahaman, S. A., Biobaku, K. T., Okwelum, N., Oyewusi, J. A.,Opeyemi,B. & Oloruntuga, O. (2014): Observation of some renal function indices in dogs under Ketamine-XylazineAnaesthesia. Sokoto Journal of Veterinary Sciences.12(2): 47-51. Published by Faculty of Veterinary Medicine, UsmanuDanfodio University, Sokoto. Available online at http://www.sokvetjournal.net/.
(33) Awoyomi, O.J., Oyewusi, J.A.,Talabi, A.O., Oyewusi, I.K., Biobaku, K.T., Mustapha, O.A. & Agbaje, M. (2014): Isolation of Aeromonashydrophila in a case of wound infection in cattle in Nigeria. Nigerian Journal of Animal Production: 41 (1) 213-219; Published by the Nigerian Society for Animal Production.
(34) Oyewusi, I. K., Anifowose, I.O., Famuyide, I. M., Oyewusi, J.A., Babatunde, B. A., Oguntusi, I. O. & Talabi, A. O. (2014). Effects of Dermatophylosis on Productivity of Cattle in a Ranch in Abeokuta, Nigeria.Nigerian Journal of Animal Science.16 (2): 335-338, Published by official Animal Science Association of Nigeria. Available online at https://www.ajol.info/index.php/tjas.
(35) Olukunle J. O., Jacobs E. B., Oyewusi, A. J.& Abatan, M. O. (2013): Hypoglycemia and Hypolipidemia effects of Acalyphawilkesiana in alloxan-induced diabetic rats. Tropical Veterinarian.31(4); 42-50, Published by Faculty of Veterinary Medicine, University of Ibadan.
(36) Awoyomi, J. O., Biobaku, K. T., Kehinde, O. O., Adebowale, O. A. & Oyewusi, J. A. (2013): A Survey of Ethnoveterinary Botanical Remedies in Ogun State and Their Public Health Implications. Nigerian Journal of Animal Production. 40 (2): 198-208. Published by the Nigerian Society for Animal Production.
(37) Oyewusi, J.A.& Saba, A.B. (2013): Biochemical response of rabbits following experimental Trypanosomabruceibruceiinfection, treatment and re-infection. Sokoto Journal of Veterinary Sciences 11(2): 36-42. Published Faculty of Veterinary Medicine, UsmanuDanfodio University, Sokoto. Available online at http://www.sokvetjournal.net/.
(38) Oyewusi, J. A., Otesile, E. B. & Sadiq, N. A. (2011): Efficacy of 1% Flumethrin Pour-on (BayticolR) against ticks on N’Dama/Brown cross Cattle under field conditions. Journal of Natural Sciences, Engineering and Technology.10 (2): 105-110.Published by Federal University of Agriculture, Abeokuta, Nigeria.
(39) Oyewusi, I. K., Otesile, E. B., Talabi, A. O. & Oyewusi, J. A. (2009): Effects of Strongylosis on some blood parameters in Goats. ASSETJournal of Agricultural Science and Environment 9 (1): 70-74. Published by Federal University of Agriculture, Abeokuta, Nigeria.
f(40)Ajadi, R.A., Kasali, O.B., Makinde, A.F.M., Adeleye, A.I., Oyewusi, J.A.& Akintunde, O.G. (2009): Effects of Midazolam on the Anaestheticproperties and Safety of Ketamine and Xylazinecombination in Guinea Fowls (Numidameleagrisgaleata). Journal of Avian Medicine and Surgery 23(3): 199-204. Published by Association of Avian Veterinarians, USA.Available online at http://www.bioone.org/doi/full/10.1647/2008-036.1. (Indexed in Scopus, SCimago).
*: Papers added since last promotion in 2023
f: Paper in Foreign Journals
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