Hernández de Anda J, Rentería Evangelista T, López Valencia G, Montaño Hodgers M
Instituto de Investigaciones en Ciencas Veterinarias, Escuela de Medicina Veterinaria y Zootecnia Universidad Autonoma de Baja California, Mexicali, Mexico.
J Am Vet Med Assoc. 1997 Sep 15;211(6):709-11.
To implement a disease monitoring system in federal, municipal, and private abattoirs in Baja California, Mexico and to estimate annual prevalence of tuberculosis (TB) in beef and dairy cattle slaughtered and inspected in 1995 and 1996.
Epidemiologic survey.
About 200,000 cattle (95% beef, 5% dairy).
Lymph node and tissue specimens with lesions suggestive of TB were fixed in neutral-buffered 10% formalin and embedded in paraffin. Sections were stained with H&E and Ziehl-Neelsen and examined for typical tuberculous lesions and acid-fast bacilli. Annual prevalence and 95% confidence intervals were estimated.
Prevalence of TB in all slaughtered cattle was 0.12 and 0.46% in 1995 and 1996, respectively (beef cattle, 0.02 and 0.05%, respectively; dairy cattle, 2.0 and 8.3%, respectively). Tuberculosis cases/1,000 slaughtered cattle were linearly associated with monthly volumes of tissue submissions.
It is critical to quantify the monitoring activity at abattoirs to better estimate the prevalence of TB in slaughtered cattle. Annual prevalence of TB was significantly greater in dairy cattle than in beef cattle. Veterinarians and cattle producers in this region are encouraged to develop and work on herd plans aimed at controlling and eradicating TB.
在墨西哥下加利福尼亚州的联邦、市立和私人屠宰场实施疾病监测系统，并估计1995年和1996年屠宰和检验的肉牛及奶牛结核病（TB）的年患病率。
流行病学调查。
约200,000头牛（95%为肉牛，5%为奶牛）。
将有提示TB病变的淋巴结和组织标本固定于中性缓冲10%福尔马林中，然后石蜡包埋。切片进行苏木精-伊红（H&E）和萋-尼染色，检查典型的结核病变和抗酸杆菌。估计年患病率及95%置信区间。
1995年和1996年所有屠宰牛的TB患病率分别为0.12%和0.46%（肉牛分别为0.02%和0.05%；奶牛分别为2.0%和8.3%）。每1000头屠宰牛的结核病病例数与每月送检组织量呈线性相关。
量化屠宰场的监测活动对于更好地估计屠宰牛的TB患病率至关重要。奶牛的TB年患病率显著高于肉牛。鼓励该地区的兽医和养牛生产者制定并实施旨在控制和根除TB的畜群计划。
