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NW N, J N-M, AN K, M O, C M, T C, MJ O, JM O, S K. " Culture of Kenyan Goat (Capra hircus) Undifferentiated Spermatogonia in Feeder-Free Conditions." Frontiers in Veterinary Science. 2022;9.
Nakami WN, Nguhiu-Mwangi J, Kipyegon AN’eno, Ogugo M, Muteti C, Kemp S. "Comparative Efficiency for in vitro Transfection of Goat Undifferentiated Spermatogonia Using Lipofectamine Reagents and Electroporation." Stem Cells and Cloning: Advances and Applications. 2022;15:11-20.
A J, AN K, HM M, EO M. "Farm-level factors affecting dairy goat artificial insemination in Kenya ." East African Agricultural and Forestry Journal. 2022;85:250-261.
Njoroge EN, Mutembei HM, Kipyegon AN, Kimeli P, Olum MO. "Prevalence of repeat breeding syndrome in dairy cattle in selected regions of Kenya." International Journal of Veterinary Science. 2021;10(2):114-118.
Njoroge EN, Mutembei HM, Kipyegon AN, Kimeli P, Olum2 MO. "Prevalence of Repeat Breeding Syndrome in Dairy Cattle in Selected Regions of Kenya." International Journal of Veterinary Science. 2020;10(2):144-118.
P K, G K, W.E M, A.N K, D M, J K, A T. "Antimicrobial susceptibility patterns of Mastitis staphylococcus aureus from bovine and caprine in peri-urban Nairobi, Kenya." East African Health Research Journal. 2017;1.
AN K, Mutembei HM, Tsuma VT, Oduma JA. "Effects of exposure to effluent contaminated river water on boar reproduction." Inter J Vet Sci. 2017;6(1):49-52.
HM M, AN K, ER M. "Environmental Estrogen-Like Endocrine Disrupting Compounds and the Dangers they pose on Male Fertility: Review Case of Nairobi River Water." Journal of Physical Science and Environmental Studies . 2017;3(3):25-29.
P K, G K, W.E M, E.M M, A.N K, A T. "Needlestick and sharps injuries among final year bachelor of veterinary medicine students at the University of Nairobi, Kenya." East African Health Research Journal. 2017;1.
AN K, Mutembei HM, Tsuma VT, Oduma JA. "Effects of Effluent Contaminated River Water on Testicular Histology of Mice." . Sch J Agric Vet Sci. 2016;3(6):411-415.
AN K, Mutembei HM, Tsuma VT, Oduma JA. "Levels Of 17β Steroid and Alkylphenol Estrogenic Endocrine Disrupting compounds in Nairobi River." Journal of Physical Science and Environmental Studies. 2016;2(3):46-49.
P K, S A, AN K, S.W M. "Acute abdominal aortic rupture in a mare on transit." international journal of agricultural science and veterinary medicine . 2015;3(2):20-22.
HM M, Cook AE, J M, DN M, J A, AN K, CM M. "A One-Health Approach to Control the Incidence of Rabies in the Slums of Nairobi." Journal of Medical and Biological Science Research . 2015;1(9):130-133.
P K, SW M, RM C, G K, TO A, WE M, AN K, JD M. "A retrospective study on findings of canine hip dysplasia screening in Kenya." Veterinary World . 2015;8(11):1326-1330.
P K, AN K, WE M, JD M. "A case of Trypanosoma congolense savannah type infection and its management in a dog." J. Adv. Vet. Anim. Res., . 2014;1(4):232-234.
P K, AN K, WE M, EGM M, Karanja DN. "Diffuse peritonitis associated with ventral hernia in an adult doe: Case report." Journal of agriculture and veterinary sciences. 2014;7(1):53-55.
P K, AN K, DN K. "Fatal obstructive urolithiasis in a 5 month old buck: a case report." Inter J Vet Sci, . 2014;3(1):40-42.
Kipyegon AN, Mutembei HM, Tsuma VT, Oduma JA. "Effects of ripe papaya (Carica papaya) seed powder on the seminiferous epithelium of the boar testis.". 2012. Abstract

The effect of oral administration of ripe Carica Papaya seed powder on testicular histology of Sus scrofa domestica boars has been addressed in the present article. Fifteen pubertal Large White boars were randomly selected and divided into two groups. Each boar in the experimental group received a daily dose of 300mg C Papaya mixed with 0.5 kg of conventional pig feed while the control group received a placebo. The experiment was carried out for 56 days in the University of Nairobi. After every two weeks, one boar from the control group and two from the experimental group were castrated and testicular tissue samples processed for histology. At the end of 56 days the remaining entire boars were maintained for 14 days and 60 days respectively without the papaya powder to assess reversibility. The test material had no effect on haematological parameters. However, histopathological changes of the seminiferous epithelium which appeared to be dependent upon duration of C Papaya consumption was noticed, these changes were reversible. Although the mechanism(s) for the effect of papaya seed extract is not explained by this study, it is observed that papaya seed powder causes gradual disorganization, exfoliation and loss of spermatocytes and spermatids.


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