title: Seroprevalence of Ornithobacterium rhinotracheale infection in commercial laying hens in the north central region of the United States.
abstract: This study was the first to examine the seroprevalence of Ornithobacterium rhinotracheale (ORT) within a commercial egg layer population. Serum samples collected from egg production companies were examined by serum plate agglutination test (SPAT) and outer membrane protein-based enzyme-linked immunosorbent assay (ELISA). Results show that 90% of layer flocks were positive by SPAT and 100% by ELISA. Of the pullet flocks examined, 43% and 52% were positive by SPAT and ELISA, respectively. Our study indicates that the prevalence of ORT antibody is high in the commercial layer population, suggesting that this respiratory pathogen can easily spread through multiple-age layer farms from older flocks to newly housed pullet flocks.
authors.affiliation: Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Minnesota, St. Paul 55108, USA.
authors.forename: C J
authors.initials: CJ
authors.lastname: Heeder
authors.forename: V C
authors.initials: VC
authors.lastname: Lopes
authors.forename: K V
authors.initials: KV
authors.lastname: Nagaraja
authors.forename: D P
authors.initials: DP
authors.lastname: Shaw
authors.forename: D A
authors.initials: DA
authors.lastname: Halvorson
mesh_terms: D000372:Agglutination Tests / Q000662:veterinary; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood*; D002645:Chickens; D004797:Enzyme-Linked Immunosorbent Assay / Q000662:veterinary; D005260:Female; D016946:Gram-Negative Aerobic Rods and Cocci / Q000276:immunology*; D016905:Gram-Negative Bacterial Infections / Q000097:blood / Q000453:epidemiology / Q000662:veterinary*; D015146:Midwestern United States / Q000453:epidemiology; D011201:Poultry Diseases / Q000097:blood / Q000453:epidemiology* / Q000382:microbiology; D016036:Seroepidemiologic Studies; D012698:Serologic Tests / Q000662:veterinary
chemical_list: D000907:Antibodies, Bacterial