title: Semen characteristics of goats with subacute, acute and chronic besnoitiosis.
abstract: A study on the semen obtained from breeding goats suffering from mild to severe chronic besnoitiosis revealed marked changes in semen volume, colour, density, concentration, mass and individual motility and percentage live. There were also many neutrophils and spermatozoa with primary and secondary defects, including missing tails and deformed heads and tails. The observed changes were considered to be severe enough to account for the infertility observed in the flock. Sections of testes obtained for histopathology were characterised by massive blockage of the pampiniform plexus, degeneration of the germinal epithelium, tubular necrosis with an inflammatory infiltrate and, in some cases, accumulation of haemosiderin-like material in the tunica vaginalis.
authors.affiliation: Department of Clinical Studies, Faculty of Veterinary Medicine, University of Nairobi, Kenya.
authors.forename: M J
authors.initials: MJ
authors.lastname: Njenga
authors.forename: S J
authors.initials: SJ
authors.lastname: Munyua
authors.forename: E R
authors.initials: ER
authors.lastname: Mutiga
authors.forename: J M
authors.initials: JM
authors.lastname: Gathuma
authors.forename: E K
authors.initials: EK
authors.lastname: Kang'ethe
authors.forename: O
authors.initials: O
authors.lastname: Bwangamoi
authors.forename: G M
authors.initials: GM
authors.lastname: Mugera
authors.forename: B N
authors.initials: BN
authors.lastname: Mitaru
mesh_terms: D000818:Animals; D003048:Coccidiosis / Q000150:complications / Q000503:physiopathology / Q000662:veterinary*; D015511:Goat Diseases / Q000503:physiopathology*; D006041:Goats; D007248:Infertility, Male / Q000209:etiology / Q000517:prevention & control / Q000662:veterinary*; D008297:Male; D008854:Microscopy, Electron; D009920:Orchitis / Q000209:etiology / Q000503:physiopathology / Q000662:veterinary; D012661:Semen / Q000166:cytology / Q000502:physiology*; D013094:Spermatozoa / Q000002:abnormalities*; D013737:Testis / Q000473:pathology / Q000503:physiopathology