title: Comparison of precipitin antibodies and virus-neutralizing antibodies to infectious bursal disease virus.
abstract: Three hundred twenty-two serum samples from commercial pullets and multiplier breeders were analyzed for agar-gel precipitin (AGP) antibodies and virus-neutralizing (VN) antibodies to infectious bursal disease virus. Two hundred thirty-four of these sera were AGP-positive, and 88 were AGP-negative. The geometric mean of the reciprocal of the VN titers for the AGP-positive sera was 208.7, and 232 (99.1%) had a VN titer of 1:16 or greater. In contrast, the geometric mean of the reciprocal of the VN titers for the AGP-negative sera was 6.1, but 53 (60.2%) had a VN titer ranging from 1:4 to 1:256. When the AGP test was compared with the VN test, the sensitivity and specificity, respectively, of the AGP test were 81.5% and 100%.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis*; D002645:Chickens / Q000276:immunology*; D007243:Infectious bursal disease virus / Q000276:immunology*; D009500:Neutralization Tests; D011201:Poultry Diseases / Q000175:diagnosis; D011233:Precipitin Tests / Q000662:veterinary; D012087:Reoviridae / Q000276:immunology*; D012088:Reoviridae Infections / Q000175:diagnosis / Q000662:veterinary
chemical_list: D000914:Antibodies, Viral