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呼盟地区每年冬季经海拉尔肉联厂集中屠宰羊25～30万只,其中90%以上是绵羊,其余是山羊。自1979年开始,检验中发现约0.1%左右的羊脾发生肿大,其体积可较正常脾大几倍。据调查,该厂在屠宰前检验中未发现可疑病羊;宰后检查见脾肿大几倍,甚至达5～10倍,脾表面色泽多无异常,少数呈淡红色(肿大5倍以上者),肩前和股前淋巴结肿大,质实,切面色灰白,致密;肾外形无异常,有些在皮质部见针尖至针头大
In the winter season in the Humeng district, 25-30 million sheep are slaughtered by the Hailar meat factory, of which more than 90% are sheep and the rest are goats. Since the beginning of 1979, about 0.1% of sheep’s spleen has been enlarged in the test, and its volume can be several times larger than normal spleen. According to the survey, the factory did not find suspicious goats during the pre-slaughter inspection; the spleen enlargement was seen several times, even 5 to 10 times, after the post-mortem inspection. The spleen surface showed no abnormalities in color, and a few were pale red (swelled more than 5 times. (1) Lymph nodes in front of the shoulders and anterior thighs are swollen, of high quality, gray and dense cut face, no abnormal kidney shape, some see the tip of the needle in the cortex to the needle