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Pathogenesis of Eimeria praecox in chickens: virulence of field strains compared with laboratory strains of E. praecox and Eimeria acervulina

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Williams, R. B.; Marshall, R. N.; Pagès, M.; Dardi, M.; del Cacho, E.

The apicomplexan genus Eimeria comprises at least 1160 species that parasitize vertebrate animals (Levine, 1988). Those found in farm animals cause serious financial losses worldwide, with poultry perhaps being the worst affected. In chickens, Eimeria acervulina, Eimeria brunetti, Eimeria maxima, Eimeria mitis, Eimeria necatrix, Eimeria praecox and Eimeria tenella each causes a separately recognizable disease resulting from the fundamental differences among the pathogenic effects characteristic of each species.

The apicomplexan genus Eimeria comprises at least 1160 species that parasitize vertebrate animals (Levine, 1988). Those found in farm animals cause serious financial losses worldwide, with poultry perhaps being the worst affected. In chickens, Eimeria acervulina, Eimeria brunetti, Eimeria maxima, Eimeria mitis, Eimeria necatrix, Eimeria praecox and Eimeria tenella each causes a separately recognizable disease resulting from the fundamental differences among the pathogenic effects characteristic of each species.

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