Multiple Routes of Entry for Escherichia coli Causing Colibacillosis in Commercial Layer Chickens

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概要

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• Colibacillosis associated with salpingitis occurred in a layer chicken flock on a commercial egg-producing farm in Japan. An increase in mortality was observed when the birds were at 62 weeks of age and reached 0.89% at 68 weeks of age. Postmortem examinations revealed pericarditis, perihepatitis, airsacculitis, and reproductive tract lesions in 4 affected birds at 69 weeks of age. Analysis of pulse-field gel electrophoresis (PFGE) patterns and putative virulence genes of 22 E. coli isolates obtained from the affected birds demonstrated that isolates from liver, heart, and the surface of the reproductive tract of one bird were genetically unrelated with those recovered from the lumen of the oviduct. In the other birds, isolates from liver, heart, and reproductive tract lesions were closely related to each other. These findings suggest that salpingitis in the former bird may be caused by ascending infection of the oviduct from the cloaca and salpingitis in the remaining birds may occur as part of systemic infection.

著者

• Ozaki Hiroichi

  Laboratory Of Microbiology Department Of Disease Control Graduate School Of Veterinary Medicine Hokk

• MURASE Toshiyuki

  Laboratory of Veterinary Microbiology, Faculty of Agriculture, Tottori University

• OZAKI Hiroichi

  Laboratory of Veterinary Microbiology, Faculty of Agriculture, Tottori University

関連論文

• Multiple Routes of Entry for Escherichia coli Causing Colibacillosis in Commercial Layer Chickens
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• Development of diagnostic method of influenza virus infection by the detection of antibodies to the NS protein

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