Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Prevalence of avian spirochaetosis in Zaria (1980-1989).

Abstract

12 outbreaks of spirochaetosis were diagnosed between January 1980 and December 1989, with 390 chickens involved. A retrospective study was conducted based on the records of the avian ambulatory clinic of the teaching hospital. 207 (53.1%) chickens of local breeds, reared traditionally, were affected, and 183 (46.9%) were improved breeds, reared semi-intensively. Nymphs and larvae of Argas persicus were picked from all the chickens. Adult A. persicus ticks were collected in the chicken houses. The age of the birds ranged between 21 and 365 days. Borrelia anserina was isolated from the blood of 7 sick birds. Clinically sick birds were treated with procaine penicillin, while those infected with A. persicus ticks were dusted with organophosphorus compound (Asuntol [coumaphos]) or carbamate (Kartzimet 20). Housing was also treated.