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目的 了解珠三角某市淡水鱼养殖环境卫生及华支睾吸虫感染情况,为制订华支睾吸虫病防控策略提供依据.方法 2016年,根据鱼塘的分布,在珠三角某市选择14个镇区36个鱼塘进行调查.每个鱼塘采样10～20尾.在3个水产批发市场,每个市场选择3～6个摊位,每个摊位采样不同鱼种20～30尾.采用消化法检查鱼体内华支睾吸虫囊蚴感染情况,并进行统计分析.结果 36个鱼塘周边均未见到粪便直接入塘的厕所,其中仅1个鱼塘周边存在粪便入塘动物栏(鸭).检测鱼塘淡水鱼437尾,感染率为4.35％(19/437).虫卵感染阳性的鱼分布在25％(9/36)的鱼塘、50％(7/14)的镇区.不同鱼的感染率分别为:鲫鱼13.95％(6/43),鲩鱼4.76％(9/189),鲮鱼4.44％(2/45),鳙鱼1.55％(2/129),非洲鲫鱼0.0％(0/31),差异有统计学意义(χ2=13.46,P<0.05).批发市场淡水鱼检测307尾,感染率为1.95％(6/307).其中鲩鱼和鳙鱼的感染率分别为3.20％(4/125)和2.78％(2/72),鲫鱼、鲮鱼和非洲鲫鱼未检出阳性,不同鱼的感染率差异无统计学意义.结论 珠三角某市鱼塘环境卫生较好,但是养殖和市售淡水鱼仍然存在一定程度华支睾吸虫囊蚴感染.“,”Objective To understand the current status of the sanitation of freshwater aquaculture environments ,and Clo-norchis sinensis infection of freshwater fish in the aquaculture and market in a city of Pearl River Delta region,so as to provide the evidence for formulating the prevention and control strategy of clonorchiasis sinensis. Methods In 2016,based on the dis-tribution of freshwater aquaculture,36 freshwater fish ponds among 14 towns were selected for sampling and investigation,and 10-20 pieces were collected from each pond. Besides,3 aquatic product wholesale markets were included,among which 3-6 stalls were selected from each market,and 20-30 pieces were collected from each stall. The metacercaria in the fish was exam-ined by the digestion method. Results In the 36 fish ponds,there were no toilets with the stool being drained into fish ponds di-rectly,and there was only one pond with duck sheds with the stool being drained into fish ponds directly. Totally 437 pieces of freshwater fish from ponds were detected,with a metacercaria positive rate of 4.35％(19/437). The metacercaria positive fish were distributed in 50％(7/14)of towns and 25％(9/36)ponds. The positive rates of crucian carp,grass carp,dace,aristich-thysnobilis,and tilapia were 13.95％(6/43),4.76％(9/189),4.44(2/45),1.55％(2/129),and 0(0/31)respectively,with statistically significant difference(χ2=13.46,P=0.01). Totally 307 pieces of freshwater fish were collected from the wholesale markets,with a total positive rate of 1.95％(6/307). The positive rate of grass carp and aristichthysnobilis were 3.20％(4/125) and 2.78％(2/72)respectively,and no positive samples were found in crucian carp,dace and tilapia,with no statistically sig-nificant difference among the different fish in the infection rate(Fisher exact P=0.75). Conclusions The sanitation of fresh-water aquaculture environments in a city of Pearl River Delta region is relative good. However,there are different degrees of Clo-norchis sinensis infection of freshwater fish in some aquaculture environments and markets.