França M, Crespo R, Chin R, Woolcock P, Shivaprasad H L
California Animal Health and Food Safety Laboratory System, Fresno Branch, University of California, Davis, 2789 S. Orange Avenue, Fresno, CA 93725, USA.
Avian Dis. 2010 Sep;54(3):1026-31. doi: 10.1637/9262-020110-Reg.1.
The myocarditis associated with reovirus in commercial turkeys was studied retrospectively. Fifty-two cases were identified between 1991 and 2009. The lesions occurred in four different poultry companies in California and affected male and female turkeys with an average age of 19 days. Increased mortality in the turkey flocks ranged from 0.35% to 3% per week in 47 cases. Reovirus was isolated from the heart in 14 out of 19 cases. Twenty-four out of 28 birds from nine cases had low vitamin E levels in the liver ranging from 0.29 to 2.5 ppm (normal 3.0 to > or = 15 ppm). Transmission electron microscopy of the heart revealed degenerative changes in the myocardial cells. Reovirus has been suggested as a probable etiology of this condition. Vitamin E deficiency might also contribute to the development of the lesions.
对商业养殖火鸡中与呼肠孤病毒相关的心肌炎进行了回顾性研究。在1991年至2009年期间共确定了52例病例。这些病变发生在加利福尼亚州的四家不同家禽公司，影响了平均年龄为19天的雄性和雌性火鸡。在47例病例中，火鸡群的死亡率每周增加0.35%至3%。19例中有14例从心脏中分离出呼肠孤病毒。来自9例病例的28只鸟中有24只肝脏中的维生素E水平较低，范围为0.29至2.5 ppm（正常为3.0至≥15 ppm）。心脏的透射电子显微镜检查显示心肌细胞有退行性变化。呼肠孤病毒被认为是这种疾病可能的病因。维生素E缺乏也可能导致病变的发展。
