豫北地区屠宰生猪肉孢子虫感染情况调查与分析  

Infection of Sarcocystisin pigs slaughtered in north of Henan Province,China

作　　者：李小军[1,2] 闫文朝[1,3] 钱伟锋[1] 王天奇[1] 韩利方[1] 袁林[1] 黄腾飞[1] 

机构地区：[1]河南科技大学动物科技学院动物检疫实验室,洛阳471003 [2]济源市动物卫生监督所,济源454650 [3]河南科技大学动物疫病防控与公共安全院士工作站,洛阳471003

出　　处：《中国人兽共患病学报》2014年第1期74-78,共5页Chinese Journal of Zoonoses

基　　金：国家自然科学基金(31001058);河南省高校青年骨干教师资助计划资助(2011GGJS-076)~~

摘　　要：目的掌握肉孢子虫病在河南屠宰生猪中的感染情况。方法利用压片镜检法和组织切片技术对豫北某大型屠宰场2011年112月份屠宰生猪进行肉孢子虫感染情况进行调查研究。结果豫北地区屠宰生猪肉孢子虫包囊平均检出率为2．38‰，低于国内其他地区，并且大多数生猪为轻度感染。寄生于膈肌、颈背侧肌、腰肌、肋间肌和股内侧肌等部位肌纤维内的包囊呈梭形、柳叶状和棒状，大小为（499-2259）μm×（163-260）μm，包囊壁有呈栅栏状的厚壁型和光滑的薄壁型两类，其中厚壁型包囊特征与米氏肉孢子虫相似。寄生于肌纤维内的包囊引起肌纤维变性、坏死、横纹消失和萎缩等病变。结论在豫北地区屠宰生猪肉孢子虫感染普遍，包囊阶段对猪有明显的致病性。说明兽医界和生猪屠宰检疫中应重视该病对人和猪的危害性，并加强检疫和控制。To determine the prevalence of sarcocystosis in slaughtered pigs in Henan Province, muscle samples of slaughtered pigs from a large slaughterhouse in the north of Henan were collected and examined for the presence of sarcocysts using muscle squashing microscopic observation and tissue section technique during January to December, 2011. The results showed that 2.38‰ of the slaughtered pigs was positive to sarcocysts, which was lower than that in other regions of China. Most of pigs were slightly infected with sarcocysts, and all of fusiform , thin lobular-, and club shaped sarcocysts did locate within the muscle fibers of diaphragm, nape of neck side muscle, psoas, intercostal muscle, and medial vastus muscles, with a size range of （499-2 259） μm× （163-260） μm. There were two types of cyst walls in sarcocysts, one was a palisade-like thick wall similar to that of S. miescheriana and another was smoothly thin wall. Both of them could cause obvious atrophy, degen eration and necrosis of muscle fibers in the diaphragm of naturally infected pigs. These findings will provide an important refer- ence for examination of Sarcocystis species in the slaughter quarantine of live pigs and control of sarcocystosis in pigs.

关 键 词：屠宰生猪 豫北地区 肉孢子虫 检出率 肌肉萎缩 

分 类 号：S855.9[农业科学—临床兽医学]