title: Search for natural nidality of influenza and parainfluenza viruses in Illinois.
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology*; D006385:Hemagglutination Inhibition Tests; D007087:Illinois; D008171:Lung Diseases / Q000453:epidemiology / Q000662:veterinary*; D008322:Mammals; D009975:Orthomyxoviridae / Q000302:isolation & purification*; D009976:Orthomyxoviridae Infections / Q000662:veterinary*; D018108:Respirovirus / Q000302:isolation & purification*