Berto G, Agnoletti F, Drigo I, Tonon E, Vascellari M, Fracas V, Bano L
a Veterinary Diagnostic Laboratory , Istituto Zooprofilattico Sperimentale delle Venezie Treviso , Italy .
Avian Pathol. 2015;44(3):200-3. doi: 10.1080/03079457.2015.1028333.
The present report describes two outbreaks of serious enteritis in commercial laying hens where Clostridium perfringens and Clostridium colinum were simultaneously detected. At the age of 44 and 31 weeks, two laying hen flocks showed an increase of the mortality rate and a worsening of productive performance. Post-mortem examination revealed intestinal necrotic-haemorrhagic ulcerations and hepatic focal necrosis. The bacteriological examination yielded the isolation of C. colinum and C. perfringens toxin type A, NetB positive. In one outbreak, C. colinum was detected also by polymerase chain reaction in all the intestines of affected birds. In laying hens, C. colinum has never been isolated but only suspected as the causative agent of a slight enteric disease called duodenal focal necrosis. The present case report was characterized by severe enteritis presumably due to the synergistic effect of C. colinum and C. perfringens.
本报告描述了两起商品蛋鸡严重肠炎疫情，其中同时检测到产气荚膜梭菌和鹑梭菌。在44周龄和31周龄时，两个蛋鸡群的死亡率上升，生产性能恶化。尸检显示肠道坏死性出血性溃疡和肝脏局灶性坏死。细菌学检查分离出产气荚膜梭菌和A型产气荚膜梭菌毒素，NetB呈阳性。在一次疫情中，通过聚合酶链反应在受感染禽类的所有肠道中也检测到了鹑梭菌。在蛋鸡中，从未分离出鹑梭菌，但仅怀疑其为一种称为十二指肠局灶性坏死的轻度肠道疾病的病原体。本病例报告的特点是严重肠炎，可能是由于鹑梭菌和产气荚膜梭菌的协同作用所致。
