摘要
目的分析浙江省1995年达到血吸虫病传播阻断标准后输入性疫情动态变化及其影响因素。方法采用回顾性调查法收集1996-2017年浙江省输入性血吸虫病疫情、本地螺情等资料,建立数据库,对病例三间分布、感染状况、诊疗情况和螺情风险因素进行分析。结果 1996-2017年浙江省30个县(市、区)共报告输入性血吸虫病病例245例,包括急性病例41例。其中241例为国内其他省份输入,主要来自毗邻的江西省和安徽省,分别占37.3%(390/241)和29.9%(72/241);境外输入埃及血吸虫病病例3例和曼氏血吸虫病病例1例,均来自非洲的尼日利亚。输入性病例数在2005年之前呈上升趋势,之后呈下降趋势。每年下半年报告的输入性病例数较多,合计占总报告输入性病例数的80.8%(198/245)。全省共30个县(市、区)有输入性血吸虫病病例报告,其中杭州、宁波、嘉兴、湖州、绍兴、金华、衢州和台州8个历史流行市25个流行县累计报告输入性病例230例, 5个非流行县报告输入性病例15例。输入性血吸虫病病例报告最多的为宁波市,占55.9%(137/245),杭州市和衢州市次之,分别占18.4%(45/245)和6.9%(17/245)。245例病例中,男性180例,女性65例;学历以初中和小学为主,分别占49.4%(121/245)和29.8%(73/245);职业以农民、工人和学生为主,分别为42.0%(103/245)、 23.3%(54/245)和14.7%(36/245)。国内其他省份输入的241例病例中, 85.1%(205/241)的病例感染地为当年的血吸虫病未控制地区或疫情回升地区, 12.4%(30/241)的病例感染地为当年的血吸虫病传播控制地区。感染方式以游泳戏水和农业生产用水接触为主,分别占37.1%(91/245)和36.3%(89/245)。疾病预防控制机构主动监测查病报告病例占51.4%(126/245),医院被动报病报告病例占48.6%(119/245)。病例首诊医疗机构以县级最多,为59.6%(146/245),被动报病中有49.6%(59/119)存在首诊误诊情况。全省除宁波、丽水市外,累计有7个市30个流行县发现有钉螺孳生,累计查到有螺面积1 739.0 hm2。结论 1996-2017年浙江省通过主动监测和被动报病共发现输入性血吸虫病病例245例,年病例数自2005后逐年下降,主要感染地为国内当年的血吸虫病未控制地区或疫情回升地区。
Objective To analyze the dynamic change and the factors that effect on the imported schistosomiasis case since the disease transmission blocking criteria have been met in Zhejiang Province in 1995.Methods Data for the imported case of schistosomiasis and snail investigation in Zhejiang Province from 1996 to2017 were collected and analyzed retrospectively for the case distribution, diagnosis, treatment and for snail ridden area. Results Totally 245 cases of imported schistosomiasis were reported in 30 counties in Zhejiang Province from1996-2017, including 41 cases of acute Schistosoma japonicum infection. Among them, 241 cases were imported from other provinces in China, mainly from neighboring Jiangxi(37.3%, 90/241) and Anhui(29.9%, 72/241). Four of them were imported from Nigeria in Africa including 3 cases of S. haematobium and 1 case of S. mansoni infections. The number of imported cases was increased in the years before 2005 with up to 40 cases in 2005, and then gardually to decreased. More cases were reported in the second half of each year(80.8%, 198/245). The imported cases were reported in total 30 counties(cities, district) in the province, most of them(230) were reported in 25 counties in the 8 historially endemic cities, and Ningbo had the largest number of imported cases(55.9%,137/245) followed by Hangzhou(18.4%, 45/245) and Quzhou(6.9%, 17/245). Among the total 245 cases, 180 were males and 65 females. More cases were found in those with low education(29.8% with primary school and49.4% with junior high school) and with blue collar occupations(farmers 42.0%, workers 23.3%) and in students(14.7%). Of the 241 cases imported from other provinces, 85.1%(205/241) cases were infected from uncontrolled or re-emerging endemic areas. Most cases were infected by the contact with contaminated water during swimming(37.1%) or agricultural practices(36.3%). More cases were identified by active monitor of local disease control authorities(51.4%, 126/245) than in clinics(48.6%, 119/245). 59.6% of the cases seeked for medication at the first time at the local county hospitals and 49.6% of them(59/119)was misdiagnosed. Snail was found in 30 formally endemic counties with a total area of 1 739.0 hm2. Conclusion The total 245 cases of imported schistosomiasis have been reported in Zhejiang Province through active monitoring and passive reporting system from1996 to 2017. The number of cases has decreased since 2005. The main sources of the imported cases are from the uncontrolled or re-emerging areas of schistosomiasis in the country.
引文
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