title: Association of lymphoid leukosis virus and performance in a randombred layer population.
abstract: The association of subclinical infections with lymphoid leukosis virus and performance was investigated in a randombred White Leghorn type population. The proportion of birds shedding group specific (gs) antigen into their egg albumen was high (23.8%). Birds with gs antigen in their albumen matured later, produced fewer and smaller eggs, and grew less rapidly tha their nonshedding counterparts.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D001353:Avian Leukosis / Q000503:physiopathology*; D001354:Avian Leukosis Virus / Q000276:immunology; D001835:Body Weight; D002645:Chickens / Q000502:physiology; D003168:Complement Fixation Tests / Q000662:veterinary; D005260:Female; D008297:Male; D010047:Ovalbumin / Q000276:immunology; D010058:Oviposition; D011201:Poultry Diseases / Q000503:physiopathology*
chemical_list: D000956:Antigens, Viral; D010047:Ovalbumin