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Study of the pathogenicity in chickens of Eimeria praecox alone or associated with Eimeria acervulina

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Among the seven species of coccidia that are able to infect chickens, Eimeria praecox is described as the less pathogenic. Its effect on growth and health is even controversial and its interest for vaccination has been questioned (Williams 2000 and 2002). When a side effect due to the infection with E .praecox is described, it is only noticed with high levels of infection (Long 1968; Jorgensen et al. 1997; Williams 1998).

Among the seven species of coccidia that are able to infect chickens, Eimeria praecox is described as the less pathogenic. Its effect on growth and health is even controversial and its interest for vaccination has been questioned (Williams 2000 and 2002). When a side effect due to the infection with E .praecox is described, it is only noticed with high levels of infection (Long 1968; Jorgensen et al. 1997; Williams 1998).

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