Abstract:

Objective To evaluate the effect of a modified crushing?cercariae escaping method on the detection of infected Oncomelania snails in the field. Methods A snail survey was carried out in Jingzhou City in the spring of 2011，and the villages were randomly divided into several groups，the coincidence rates，detection rates and the labour cost of the modified crushing?cer? cariae escaping method and crushing method were compared. Results A total of 14 snail spots were surveyed，and the coinci? dence rate of the two methods was 100%. In the spring snail survey，539 villages and 3 536 spots with snails were detected by the modified crushing?cercariae escaping method，and 671 villages and 11 375 spots with snails were detected by the crushing meth? od. The detection rates of villages with infected snails of the two methods were 25.79% and 28.46%，respectively，the difference between them was not statistically significant（χ2 =1. 079 5，P > 0.05）；and those of spots with infected snails were 5.57% and 3.66%，respectively，which had no significant difference between them（χ2 = 95.464 1，P < 0.01） . Compared with the crushing method，the modified crushing?cercariae escaping method reduced labour cost by 87.86 %，and saved 12.95 person?days per town? ship. Conclusion The modified crushing?cercaria escaping method can identify the spots with infected snails quickly and accu? rately with less labour cost， therefore, it is suitable for detecting environments with infected snails in batch in endemic areas.

Key words: Oncomelania snail； Modified crushing?cercariae escaping method；Crushing method；Effect； Jingzhou City

摘要：

评价改良压碎逸蚴法 （压逸法） 现场检测感染性钉螺效果。方法 方法 2011年4-5月， 在湖北省荆州市进行查螺， 以村为单位随机分组， 比较压逸法和压碎法现场检测感染性钉螺的符合率、 检出率及人力投入。结果 结果 检测14个有螺环境， 压逸法和压碎法感染性螺点检出符合率为100%。春季查螺， 压逸法检测539个有螺村、 3 536个螺点， 压碎法检测 671个有螺村、 11 375个螺点， 两法对感染性螺点村的检出率分别为25.79%和28.46 %， 差异无统计学意义 （χ2 = 1.079 5， P＞0.05）； 对感染性螺点的检出率分别为5.57%和3.66%， 差异有统计学意义 （χ2 = 95.464 1， P＜0.01）。压逸法比压碎法减少人力投入87.86%， 平均每乡 （镇） 节省人力12.95人⋅ d。结论 结论 压逸法快速确定感染性螺点效果明显， 定性准确， 节省人力投入， 适用于疫区批量检测感染性钉螺及感染性钉螺环境 （段）

关键词: 钉螺； 改良压碎逸蚴法； 压碎法； 效果； 荆州市