Rejection ofEimeriaby foreign hosts

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Abstract
SUMMARY: Oocysts ofEimeria maximainoculated into guinea fowl do not develop. Infection occurs when intestinal mucosa or liver tissue from guinea fowl givenE. maximais transferred to susceptible chickens. By transferring material at different times after inoculation, it was shown that most of the stages are lost between 6 and 12 h and few, if any, survive to 48 h.Sporozoites ofE. tenellahad low infectivity after 48 h contactin vitrowith peritoneal macrophages from guinea fowls and turkeys. Sporozoites ofE. grenierifrom the guinea fowl appeared to be destroyed within macrophages taken from chickens.