title: Studies on the bacterial etiology of airsacculitis of broilers in northern and middle Jordan with special reference to Escherichia coli, Ornithobacterium rhinotracheale, and Bordetella avium.
abstract: A total of 100 poultry farms in northern and middle areas of Jordan were sampled to investigate the bacteria associated with airsacculitis in broiler chickens. Of 170 bacterial isolates, 88.2% were identified as Escherichia coli, 8.8% as Ornithobacterium rhinotracheale, and 3% as Bordetella avium. Fourteen serotypes of E. coli were identified among 66 typeable isolates and the remainder were untypeable. The most prevalent serotypes were O1, O8, and O78. The main serotype of O. rhinotracheale was serotype A. Experimental inoculation of O. rhinotracheale via intravenous, intratracheal, and intra-air sac routes resulted in growth retardation, thickening in the air sacs, arthritis, and liver necrosis. Reisolation of O. rhinotracheale from the air sacs, liver, trachea, heart, and spleen at day 7 postinoculation confirmed its role. In vitro susceptibility testing revealed that E. coli isolates were sensitive to gentamicin and colistin, O. rhinotracheale to tetracyline, and B. avium to most of the nine antibiotics examined.
authors.affiliation: Department of Basic Veterinary Medical Sciences, Faculty of Veterinary Medicine, Jordan University of Science and Technology, Irbid.
authors.forename: Saeb N
authors.initials: SN
authors.lastname: El-Sukhon
authors.forename: Asad
authors.initials: A
authors.lastname: Musa
authors.forename: Majed
authors.initials: M
authors.lastname: Al-Attar
mesh_terms: D000400:Air Sacs / Q000382:microbiology*; D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001884:Bordetella / Q000145:classification; D001885:Bordetella Infections / Q000382:microbiology / Q000662:veterinary; D002645:Chickens; D024881:Drug Resistance, Bacterial; D004926:Escherichia coli / Q000145:classification; D004927:Escherichia coli Infections / Q000382:microbiology / Q000662:veterinary; D006090:Gram-Negative Bacteria / Q000145:classification* / Q000302:isolation & purification / Q000472:pathogenicity*; D016905:Gram-Negative Bacterial Infections / Q000382:microbiology / Q000662:veterinary*; D006321:Heart / Q000382:microbiology; D007597:Jordan; D008099:Liver / Q000382:microbiology; D008826:Microbial Sensitivity Tests / Q000662:veterinary; D011201:Poultry Diseases / Q000382:microbiology*; D012141:Respiratory Tract Infections / Q000382:microbiology / Q000662:veterinary*; D012703:Serotyping / Q000662:veterinary; D013154:Spleen / Q000382:microbiology
chemical_list: D000900:Anti-Bacterial Agents