Title: Pathogenicity of Eimeria mivati in Light and Heavy Coccidial Infections
Abstract:EIMERIA MIVATI is the most recently described of the nine recognized species of chicken coccidia (Edgar and Siebold, 1964). No controlled experiments have been reported comparing the long range effect...EIMERIA MIVATI is the most recently described of the nine recognized species of chicken coccidia (Edgar and Siebold, 1964). No controlled experiments have been reported comparing the long range effects of mild and heavy infection with this species. Such background information would aid the diagnostician in deciding if a flock has coccidiosis, requiring treatment, or coccidiasis, requiring none. Coccidiasis (Levine, 1961) has been defined as a mild infection resulting in no measurable damage. In a recent study conducted on E. acervulina, an upper intestinal coccidium, it was concluded that a lesion score of +1 and possibly +2 lesions should be diagnosed as coccidiasis in field cases (Reid and Johnson, 1970; Johnson and Reid, 1970) while the more severe +3 and +4 lesion scores should be classed as coccidiosis and treated accordingly. To determine the effects of light, moderate and heavy infections of E. mivati on broiler-type chickens, graded doses of…Read More