广州市部分高校广州管圆线虫的中间宿主东风螺感染情况调查

Survey on the infection of the intermediate of Angiostrongylus cantonensis in some universities in Guangzhou

目的调查广州市内有代表性的一部分高等院校广州管圆线虫中间宿主东风螺的情况，了解其分布及广州管圆线虫的感染情况，为制订广州管圆线虫病的防治措施提供依据。方法对广州市中心地带的各区进行调查，每个区选取1～2所高校作为调查点，在野外鼠类活动较多的地方采集东风螺作为调查样本，利用消化法观察并统计其广州管圆线虫的感染率与感染度。结果5个区共8个调查点均发现有东风螺分布，除中山大学北校区与华南农业大学未发现东风螺感染广州管圆线虫外，其余调查点均收集到感染的东风螺。所有调查点共检查东风螺292只，广州管圆线虫的感染率为16．1％（47／292），各地区感染率差异有统计学意义（X^2=186．4，P〈0．01），平均感染度为410．6条／螺。结论广州管圆线虫的中间宿主东风螺在广州各高校分布依旧广泛，且大部分东风螺均不同程度地感染广州管圆线虫．但总体感染率和感染度相对有所下降。

Abstract： Objective To know about the distribution and infection status of intermediate host ofAngiostrongylus cantonensis, Achatinafulica, in some representative colleges in Guangzhou and provide the scientific basis for making surveillance program. Methods Survey sites were chosen in five districts in central Guangzhou, one or two colleges in each site. A chatinafulicas were collected in wild fields where rats always appear, and detected for infection by digestion methods. Results Totally 8 survey sites, all of which have Achatinafulica distributed, were sampled in five districts in Guangzhou, where totally 292 Achatina fulicas were collected. Infected Achatinafulica were found in all of these places, except for the South China Agricultural University and the North Campus of Sun Yat-sen University. The infection rate was 16.1% （47/292）. Conclusion Achatina fulica, the intermediate of angiostrongyliasis cantonensis, was widely distributed in Guangzhou. The intermediate and definitive hosts were infected with Angiostrongylus cantonensis at different levels.