title: Pasteurella haemolytica as a co-pathogen in pullets and laying hens.
abstract: Pasteurella haemolytica was isolated from internal organs of laying hens and pullets of four flocks in which five incidents of increased mortality had occurred. There was inflammation of the trachea in all cases, and infectious laryngotracheitis virus was identified in three of the incidents. Rapid response to antimicrobial therapy was seen in two out of three outbreaks in the pullets. P. haemolytica was regarded as a significant secondary invader in these cases.
authors.affiliation: Department of Veterinary Diagnostic Investigation, College of Veterinary Medicine, University of Minnesota, St. Paul 55108.
authors.forename: D P
authors.initials: DP
authors.lastname: Shaw
authors.forename: D B
authors.initials: DB
authors.lastname: Cook
authors.forename: S K
authors.initials: SK
authors.lastname: Maheswaran
authors.forename: C J
authors.initials: CJ
authors.lastname: Lindeman
authors.forename: D A
authors.initials: DA
authors.lastname: Halvorson
mesh_terms: D000818:Animals; D002645:Chickens; D004196:Disease Outbreaks / Q000662:veterinary; D005260:Female; D006566:Herpesviridae Infections / Q000150:complications / Q000382:microbiology / Q000662:veterinary*; D001352:Herpesvirus 1, Gallid / Q000302:isolation & purification*; D010325:Pasteurella / Q000302:isolation & purification; D010326:Pasteurella Infections / Q000150:complications / Q000382:microbiology / Q000662:veterinary*; D011201:Poultry Diseases / Q000382:microbiology*; D014132:Trachea / Q000473:pathology