Excystation of the sporozoites of Eimeria tenella in apparently unbroken oocysts in the chicken.
D000818:Animals; D002645:Chickens; D003048:Coccidiosis / Q000382:microbiology*; D004539:Eimeria / Q000254:growth & development*; D007422:Intestines / Q000382:microbiology; D011201:Poultry Diseases / Q000382:microbiology