title: Prevalence of hepatic helminths and associated pathology in impala (Aepyceros melampus) in Swaziland.
abstract: The livers of impala (Aepyceros melampus) collected in the Mlawula-Mbuluzi-Simunye Nature Reserve and Protected Area complex in northeastern Swaziland from October 1985 to September 1986 were infected with three species of helminths: a nematode (Cooperioides hepaticae), a cestode (Stilesia hepatica), and a trematode (Fasciola gigantica). Cooperioides hepaticae caused a severe cholangitis. Lambs were infected at 1.5 to 2 mo of age, and the prevalence increased to 100% by 5 mo of age. The prevalence was 82% in yearlings and 44% in adults, with the highest prevalence and intensity of infection at the end of the dry season. Stilesia hepatica was found primarily in adults. Heavy infections caused a thickening and distension of the main bile ducts, but no changes were evident in the liver parenchyma. Fasciola gigantica, found only in one adult male, caused a thickening and distension of main bile duct. There was no apparent association between the helminth infections and body condition.
authors.affiliation: Department of Biology, University of Swaziland, Kwaluseni.
authors.forename: G J
authors.initials: GJ
authors.lastname: Gallivan
authors.forename: I K
authors.initials: IK
authors.lastname: Barker
authors.forename: J
authors.initials: J
authors.lastname: Culverwell
authors.forename: R
authors.initials: R
authors.lastname: Girdwood
mesh_terms: D000367:Age Factors; D000818:Animals; D000866:Antelopes / Q000469:parasitology*; D013541:Eswatini / Q000453:epidemiology; D005260:Female; D006373:Helminthiasis / Q000453:epidemiology / Q000473:pathology; D006374:Helminthiasis, Animal; D008099:Liver / Q000469:parasitology / Q000473:pathology; D008109:Liver Diseases, Parasitic / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary*; D008297:Male; D015995:Prevalence; D012621:Seasons