title: Incidence of antibody to swine influenza virus in Iowa breeder and butcher pigs correlated with signs of influenza-like illness.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis*; D006385:Hemagglutination Inhibition Tests; D007484:Iowa; D009500:Neutralization Tests; D009975:Orthomyxoviridae / Q000276:immunology*; D009976:Orthomyxoviridae Infections / Q000453:epidemiology / Q000276:immunology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000453:epidemiology / Q000276:immunology
chemical_list: D000914:Antibodies, Viral