河南省蛙类曼氏迭宫绦虫裂头蚴感染情况调查

Investigation on prevalence of Spirometra mansoni sparganum infection in frogs from Henan Province

目的了解河南省蛙类曼氏迭宫绦虫裂头蚴的自然感染情况,分析人群感染曼氏裂头蚴的潜在风险。方法分别在河南省12个调查点采集蛙类,剥皮后检查并分离寄生于蛙肌肉中的曼氏裂头蚴,记录其位置和数量。结果河南省蛙类曼氏裂头蚴自然感染率为26.63%(306/1149),累计发现曼氏裂头蚴1897条,平均感染度为6.2条/只;青蛙曼氏裂头蚴感染率高于蟾蜍,差异有统计学意义(χ2=30.42,P<0.01);病例居住地青蛙的曼氏裂头蚴自然感染率高于其他调查点(χ2=8.46,P<0.01);豫西地区蛙类曼氏裂头蚴感染率低于其他地区(χ2=13.45,P<0.01);蛙类后腿是曼氏裂头蚴的主要寄生部位,占73.74%(1365/1851)。结论河南省自然界生存的蛙类普遍存在曼氏裂头蚴感染,对人群有潜在致病威胁,应采取综合性防治措施加强对曼氏裂头蚴病的防控。

Objective To understand the prevalence of Spirometra mansoni sparganum infection in frogs from Henan Province and analyze the risk of people suffering from sparganum infection. Methods The spargana were examined in the muscle of frogs collected from 12 sites of 5 regions in Henan Province, and the amount of spargana and their location were recorded. Results The natural infection rate of Spirometra mansoni spargana in frogs was 26.63%（306/1 149）. There were totally 1 897 spargana found in those frogs, and the average was 6.2 per frog. The infection rate of pond frogs was higher than that of toad, the difference was statically significant （[χ2]=30.42,P0.01）. The natural infection rate of pond frogs in the nearby patients’ residence was higher than that of pond frogs collected from the other sites, and the natural infection rate of frogs was lower in the west region of Henan than that in the other areas. The muscles of hind legs of the frogs was the most common parasitic location compared with other parts of the frogs, and the ratio was 73.74%（1 365/1 851）. Conclusion The frogs living in the nature are widely infected with Spirometra mansoni spargana in Henan Province, and the comprehensive measures should be taken for the prevention and control of sparganosis mansoni.