title: Immunization of chickens against coccidiosis with extracts of Eimeria-infected tissues.
abstract: Immunization of chickens with extracts prepared from Eimeria-infected tissues was attempted. Significant protection against weight depression was conferred when chickens were inoculated intra-abdominally with tissue extracts prepared from ceca infected with two different strains of E. tenella. When extracts were given intravenously, with or without the adjuvant, polyandenylic-polyuridylic acid, weight depression was not ameliorated after challenge. Experiments using extracts from two strains of E. acervulina- and E. maxima- and one strain of E. brunetti-infected tissues failed to protect against weight gain depression after challenge.
mesh_terms: D000818:Animals; D002645:Chickens; D003048:Coccidiosis / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*; D007114:Immunization; D011201:Poultry Diseases / Q000276:immunology* / Q000517:prevention & control; D014020:Tissue Extracts / Q000276:immunology
chemical_list: D014020:Tissue Extracts