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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

Saeb N. El-Sukhon, Asad Musa and Majed Al-Attar
Avian Diseases
Vol. 46, No. 3 (Jul. - Sep., 2002), pp. 605-612
Stable URL: http://www.jstor.org/stable/1592940
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
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
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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. /// Un total de 100 granjas en las zonas norte y central de Jordan fueron muestreadas para investigar las bacterias asociadas con la aerosaculitis en pollos de engorde. De 170 bacterias aisladas, el 88.2% fueron identificadas como Escherichia coli, el 8.8% como Ornithobacterium rhinotracheale y el 3% como Bordetella avium. Se identificaron 14 serotipos de E. coli entre los 66 aislados tipificables, el resto de aislados no pudieron ser tipificados. Los serotipos más prevalentes fueron O1, O8 y O78. El serotipo A de O. rhinotracheale fue el principal. La inoculación experimental de O. rhinotracheale por las vías intravenosa, intratraqueal y en los sacos aéreos, resultó en retardo del crecimiento, engrosamiento de los sacos aéreos, artritis y necrosis hepática. El reaislamiento de O. rhinotracheale a partir de los sacos aéreos, hígado, tráquea, corazón y bazo al séptimo día postinoculación, confirmó el papel ejercido por este organismo. Los antibiogramas revelaron que los aislados de E. coli eran sensibles a la gentamicina y la colistina, los de O. rhinotracheale a la tetraciclina, y los de B. avium fueron sensibles a la mayoría de los antibióticos examinados.

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