The susceptibility of chickens to Trypanosoma brucei subspecies.

摘要: Abstract Chickens were susceptible to infection with three different stocks of the subgenus Trypanozoon : two presumptive Trypanosoma b. brucei and one T. rhodesiense . Two groups chickens used: first hatched following inoculation either or during embryonic development, second infected as adult birds. In both experimental groups, parasitaemia persisted for prolonged periods, but was mostly subpatent detectable only by subinoculation blood into mice. embryos, parasitaemias patent five weeks after hatching, thereafter (to 13 17). Quantitative estimations seven birds from embryos inoculated revealed fluctuations in number circulating trypanosomes, an initial peak between days 2 9 hatching. Between 17 hatching appeared have recovered spontaneously trypanosome infections. Homologous challenge at week 20 failed produce a recrudescence parasitaemia, indicative possible acquired immunity. The infections ten microscopically throughout observation period six weeks, mice showed parasitaemic thereafter. Different aspects avian hosts subspecies are discussed.