Abstract: Objective　To investigate the prevalence of Angiostrongylus cantonensis infection in market⁃sold and field⁃captured snails in Fujian Province, so as to provide the scientific basis for the formulation of the angiostrongyliasis control measures. Methods　In each month from May to October during the period from 2017 through 2021, Pomacea snails were collected from two field fixed surveillance sites and Bellamya aeruginosa collected from one agricultural product market in Fuzhou City, while Pomacea and B. aeruginosa snails were collected from two agricultural product markets and four restaurants in Xiamen City. At least 50 Pomacea snails and 500 g B. aeruginosa were sampled each time. A. cantonensis infection was detected in Pomacea snails using lung microscopy, and in B. aeruginosa using a tissue homogenate method. Results　A total of 9 531 Pomacea snails were detected for A. cantonensis infection in two cities of Fuzhou and Xiamen, and the overall prevalence of A. cantonensis infection was 4.40%, with the highest prevalence in 2017 (6.82%, 116/1 701) and the lowest prevalence in 2019 (3.46%, 83/2 400). The prevalence of A. cantonensis infection was significantly higher in Pomacea snails sampled from Fuzhou City (11.23%, 326/2 903) than from Xiamen City (1.40%, 93/6 628) ([χ2] = 461.48, P < 0.01). A. cantonensis larvae were detected in larval Pomacea snails in two cities of Fuzhou and Xiamen each month. The prevalence of A. cantonensis infection in Pomacea snails appeared an overall tendency towards a rise with month in Fuzhou City, with the highest prevalence in October (15.24%), and there was a significant difference among month ([χ2] = 14.56, P < 0.05), while the prevalence of A. cantonensis infection in Pomacea snails was low in Pomacea snails sampled from Xiamen City each month, with the highest prevalence in June (2.64%), and there was a significant difference among month ([χ2] = 23.17, P < 0.05). A total of 18 966 B. aeruginosa snails were detected for A. cantonensis infection in two cities of Fuzhou and Xiamen, and the overall prevalence of A. cantonensis infection was 0.01%. Conclusions　A. cantonensis infection was identified in Pomacea and B. aeruginosa snails in Fujian Province from 2017 to 2021, and there is a potential risk of human A. cantonensis infection.

Key words: Angiostrongylus cantonensis, Pomacea canaliculata, Bellamya aeruginosa, Fujian Province, Fuzhou City, Xiamen City

摘要： 目的　了解2017—2021年福建省市售及野外螺类广州管圆线虫感染情况，为福建省制定广州管圆线虫病防治方案提供科学依据。方法　2017—2021年每年5—10月，在福建省福州市每月选取2个野外固定监测点采集福寿螺、1个农贸市场采集铜锈环棱螺；在厦门市选取2个农贸市场和4个餐馆作为固定监测点，采集福寿螺和铜锈环棱螺。每个固定监测点每次采集福寿螺50只以上、铜锈环棱螺约500 g。采用肺检法检测福寿螺广州管圆线虫感染，采用匀浆法检测铜锈环棱螺广州管圆线虫感染。结果　2017—2021年累计检测福寿螺9 531只，广州管圆线虫感染阳性419只，总感染率为4.40%，以2017年感染率最高（6.82%，116/1 701）、2019年感染率最低（3.46%，83/2 400）。其中厦门市累计检测福寿螺6 628只，广州管圆线虫感染率为1.40%；福州市累计检测福寿螺2 903只，广州管圆线虫感染率为11.23%，差异有统计学意义（[χ2] = 461.48，P < 0.01）。福州市和厦门市两地每月均有福寿螺检出广州管圆线虫幼虫。福州市福寿螺广州管圆线虫感染率总体呈逐月上升趋势，以10月阳性检出率最高（15.24%），不同月份感染率差异有统计学意义（[χ2] = 14.56，P < 0.05）；厦门市各月福寿螺广州管圆线虫感染率均较低，以6月阳性检出率最高（2.64%），不同月份感染率差异有统计学意义（[χ2] = 23.17，P < 0.05）。2017—2021年两地累计检测铜锈环棱螺18 966只，广州管圆线虫总体感染率为0.01%。结论　2017—2021年福建省福寿螺和铜锈环棱螺均检出广州管圆线虫感染，存在人群感染潜在风险。

关键词: 广州管圆线虫, 福寿螺, 铜锈环棱螺, 福建省, 福州市, 厦门市