热应激对肉鸡试验性大肠杆菌病发病过程的影响

Effects of Heat Stress on the Development of Experimental Colibacillosis in Broiler Chickens

研究37℃热应激对肉鸡试验性大肠杆菌病发病过程的影响。结果表明,热应激条件下感染大肠杆菌肉鸡比单纯感染大肠杆菌肉鸡的临床症状出现晚、持续时间短,脏器病变率降低,死亡率极显著下降(P<0.01)(10%,55%),体温和呼吸频率极显著升高(P<0.01)。结论:37℃热应激在一定程度上可能会阻断肉鸡大肠杆菌病的发病过程。

The experiment was designed to investigate effects of 37℃ heat stress on the development of experimental colibacillosis in broiler chickens. The results showed that： Under the heat stress, the clinical signs and pathological changes of broiler chickens with colibacillosis were less severe, the mortality was significantly lower （P 〈0. 01）, the body temperature and respiration rate were significantly higher （P〈0. 01） than those of the broiler chickens with only E. coli infection. The conclusion： the development of experimental colibacillosis in broiler chickens may be blocked in a way under the 37℃ heat stress.