The serological response of chickens to an avian influenza A virus administered by various routes

An avian influenza A virus (Hav7 Neq2) isolated from a feral duck in Western Australia was transmitted to groups of broiler chickens by cloaca, mouth, eye drop or spray. No disease or deaths occurred. Serum samples were examined by haemagglutination inhibition test and enzyme linked immunosorbent assays and the results gave reasonable correlation. Chickens infected by cloaca or spray gave the best overall seroconversions.