摘要
160只商品代AA肉仔鸡于29日龄时随机均分为常温对照组、热应激对照组、常温感染组和热应激感染组．研究了37℃热应激对实验性感染大肠杆菌肉鸡肺动脉压和右心功能的影响。结果37℃热应激1～3d极显著降低（P〈0．01）肉鸡感染大肠杆菌引起的肺动脉高压，肺动脉收缩压、舒张压和平均肺动脉压分别下降了34．78％、45．83％、40．48％。热应激3、7d，感染大肠杆菌肉鸡右心室收缩压显著下降（P〈0．05，P〈0．01），分别下降了26．60％、28．00％，右心室收缩和舒张压最大变化速率显著下降（P〈0．05），分别下降了77．50％，50．77％和75．00％、50．58％。结果表明，37℃热应激可以拮抗肉鸡感染大肠杆菌引起的肺动脉高压，降低感染肉鸡死亡率，但使右心功能下降。
Effects of 37 ℃ constant heat stress on pulmonary artery pressure and right ventricle function in broiler chickens inoculated experimentally with E, coli were studied. The results showed that：pulmonary hypertension（PH） in broiler chickens inoculated experimentally with E, coli decreased significantly（P〈0. 01 ）,and pulmonary artery systolic/diastolic pressure ,mean pulmonary artery decreased separately 34, 78% ,45.83% ,40, 48% in average from 1st to 3rd day after heat stress. On 3rd and 7th day after heat stress,righe ventricle systolic pressure in broiler chickens inoculated experimentally with E. coli decreased significantly（P〈0. 05,P〈0.01 ） 26.6% and 28.00% ,and maximum increasing rate of righe ventricle systolic/diastolic pressure decreased separately significantly（P〈0. 05） 77.50% ,50. 77% and 75.00% ,50. 58%. The conclusion：37℃ heat stress decreased significantly pH,mortality and right ventricle function in broiler chickens inoculated experimentlly with E. coli.
出处
《中国兽医学报》
CAS
CSCD
北大核心
2006年第4期408-410,414,共4页
Chinese Journal of Veterinary Science
基金
国家自然科学基金资助项目(3007056730371063)
关键词
热应激
肉鸡大肠杆菌病
肺动脉压
右心室压
heat stress
colibacillosis in broiler chickens ,pulmonary artery oressure,right ventricl oressure
作者简介
李东红（1961-），男，副教授，硕士。
通讯作者
