title: An occurrence of avian influenza virus infection in laying chickens.
abstract: The isolation of avian influenza virus from chickens is reported for the first time in the United States since the fowl plague outbreak of 1929. The type-A virus was isolated from commercial Leghorn laying hens between 54 and 55 weeks old and involved three different farms in north-central Alabama. These flocks experienced up to 69% mortality and a severe decrease in egg production within a 14-day period.
mesh_terms: D000407:Alabama; D000818:Animals; D002645:Chickens; D005260:Female; D009980:Influenza A virus / Q000302:isolation & purification; D005585:Influenza in Birds / Q000453:epidemiology* / Q000382:microbiology / Q000473:pathology