[Development of Eimeria tenella, agent of cecal coccidiosis in chickens, in non-specific hosts: existence of an infective exointestinal form].

The administration of various organs from Mice inoculated 1 to 7 days before with E. tenella oocysts induced caecal coccidiosis in Chicken. The most infective organs were the muscles and the intestine and to a lesser extent, the brain and the thymus. This demonstrates the existence of an exo-intestinal form of the parasite in a non specific host. This form is infective for the specific host.