Anticoccidial drugs: factors affecting pathogenicity of avian coccidia.
D000367:Age Factors; D000818:Animals; D002645:Chickens; D004539:Eimeria; D011201:Poultry Diseases / Q000209:etiology* / Q000401:mortality; D013045:Species Specificity; D014777:Virus Diseases / Q000150:complications; D014713:Viruses, Unclassified