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Eimeria acervulina, E. brunetti, and E. maxima: pathogenic effects of single or mixed infections with low doses of oocysts in chickens



Eimeria acervulina, E. brunetti, and E. maxima: pathogenic effects of single or mixed infections with low doses of oocysts in chickens



Experimental Parasitology 39(3): 415-421



The pathogenic effects of E. acervulina, E. brunetti, and E. maxima were modified when chickens received mixed infections with these species. Six-week-old chickens were inoculated with doses of 20 000 oocysts of E. acervulina, 1250 oocysts of E. brunetti, and 5000 oocysts of E. maxima singly or mixed. Typical signs of coccidiosis were apparent in chickens infected with a single Eimeria sp. When birds were given infections composed of two species, the weight loss was greater than that due to either given alone, but when three species were given, weight loss was slightly less than that due to infection with E. brunetti alone. Oocyst production due to E. acervulina tended to be similar in birds given this species alone or with E. brunetti. Oocyst output fell to less than 50% when E. acervulina was administered with E. maximaa. Oocyst production due to E. brunetti and E. maxima decreased when these species were inoculated together and when they were administered with E. acervulina. Lesions of E. acervulina and E. brunetti were superimposed on those of E. maxima in birds given mixed infections. Growth retardation was not evident in chickens inoculated with E. acervulina alone, although weight loss increased when this species was administered with either E. brunetti or E. maxima.

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Accession: 000364480

Download citation: RISBibTeXText

PMID: 1269585

DOI: 10.1016/0014-4894(76)90045-x



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