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ELISA results of serum collected from commercial broiler breeder chickens. Fifty percent of the chickens have ELISA S/N < 0.2 which indicates the presence of high protective titers and able to afford high level protection to the progeny, meanwhile 46.15% of the chickens have ELISA S/N in the range of 0.2 to 0.8 affording low levels of protection to the progeny. Only 3.85% of the chickens have ELISA S/N > 0.8 indicating negative result for antibody against CAV.
