Ozaki Hiroichi, Murase Toshiyuki
Laboratory of Veterinary Microbiology, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan.
J Vet Med Sci. 2009 Dec;71(12):1685-9. doi: 10.1292/jvms.001685.
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.
日本一家商业蛋鸡养殖场的蛋鸡群中发生了与输卵管炎相关的大肠杆菌病。鸡群62周龄时死亡率开始上升，68周龄时达到0.89%。剖检发现，69周龄的4只患病鸡出现心包炎、肝周炎、气囊炎和生殖道病变。对从患病鸡分离出的22株大肠杆菌进行脉冲场凝胶电泳（PFGE）图谱分析和推定毒力基因分析，结果表明，从一只鸡的肝脏、心脏和生殖道表面分离出的菌株与从输卵管腔分离出的菌株在基因上不相关。在其他鸡中，从肝脏、心脏和生殖道病变部位分离出的菌株彼此密切相关。这些发现表明，前一只鸡的输卵管炎可能是由泄殖腔上行感染输卵管所致，其余鸡的输卵管炎可能是全身感染的一部分。
