宁波市并殖吸虫病流行现状

Epidemiological Survey on Paragonimiasis in Ningbo City,Zhejiang Province

收集2000-2007年宁波市疾控中心寄生虫病门诊并殖吸虫病病例资料,调查并殖吸虫病历史流行区人群自然感染情况,以及并殖吸虫第一、第二中间宿主和保虫宿主的感染情况。从2643份疑似患者血清中检出并殖吸虫抗体阳性417份,阳性率为15.8%,男女比例为1︰1.19,多数病例存在外周血嗜酸粒细胞增高。历史流行区人群血清阳性率为3.1%(46/1462),男性和女性的感染率分别为2.8%(18/649)和3.2%(26/813),两者差异无统计学意义(χ2=0.1833,P>0.05)。第一中间宿主川卷螺阳性率为0.05%(9/19368),第二中间宿主长江华溪蟹和浙江华溪蟹阳性率为31.1%(15627/50313),保虫宿主阳性率为11.9%(52/438)。宁波市部分地区仍存在并殖吸虫病的自然疫源地。

Serum samples were collected from 2 643 suspected cases of paragonimiasis in 2000-2007 from the outpatient departments of the city hospitals and surrounding areas, and the infection rate in the inhabitants, the first and second intermediate hosts, and animal reservoir hosts were investigated in the historical endemic areas. Serum samples were detected and 417 were found antibody positive （15.8%）. Among residents in the historical endemic areas, the seropositive rate was 3.1%（46/1 462）, 2.8%（18/649） and 3.2% （26/813） in males and females respectively （χ^2=0.183 3, P〉 0.05）. The infection rate in first intermediate host （snails）, second intermediate host （crabs） and animal reservoir hosts was 0.05%（9/19 368）, 31.1% （15 627/50313） and 11.9% （52/438） respectively. Evidently, natural nidi for Paragonimus spp. still exist in Ningbo City.