[Study of the immunogenic capacity of the oocytes of E. tenella following irradiation with gamma rays].
Studied was the immunizing capacity of Eimeria tenella oocysts, treated with gamma rays at the rate of 6000 R, in 10- and 20-day-old chickens. The oocysts sporulated after treatment. Applied at the rate of 50,000 R they showed lower virulence and were capable of inducing resistance to reinfection with nonirradiated oocysts at rates that were three times as much. Following reinfection some birds manifested subclinical coccidiosis but survived. This showed that the immunization with oocysts that had been irradiated with 6,000 R had its peculiar aspects.
D000818:Animals; D003048:Coccidiosis / Q000517:prevention & control*; D004539:Eimeria / Q000528:radiation effects*; D005069:Evaluation Studies as Topic; D005260:Female; D007114:Immunization / Q000379:methods*; D010063:Ovum / Q000528:radiation effects*; D011201:Poultry Diseases / Q000517:prevention & control*; D011830:Radiation Effects
V'rkhu imunogennata sposobnost na ootsisti na E. tenella sled obl "chvane s gamma-1" chi