Abstract: Objective　To investigate the epidemiology of echinococcosis in Serthar County, Sichuan Province, so as to provide insights into optimization of echinococcosis control measures. Methods　The prevalence of human echinococcosis was surveyed among permanent residents living in Serthar County at ages of over 2 years from 2016 to 2019, and the prevalence of Echinococcus infections was surveyed in owned dogs, yaks and rodents in 2019. The epidemiological features of echinococcosis in humans and animals were descriptively analyzed. Results　The overall prevalence of human echinococcosis was 3.72% (1 613/43 362) in Serthar County from 2016 to 2019, and the prevalence rates of cystic echinococcosis, alveolar echinococcosis and mixed infections of cystic echinococcosis and alveolar echinococcosis were 1.72% (745/43 362), 1.98% (860/43 362) and 0.02% (8/43 362), respectively. The prevalence of human echinococcosis was higher in pastoral areas (4.13%, 1 577/38 149) than in semi⁃agricultural and semi⁃pastoral areas (0.69%, 36/5 213) ([χ2] = 151.82, P < 0.05); however, there was no significant difference in the prevalence between men (3.76%, 819/21 787) and women (3.68%, 794/21 575) ([χ2] = 0.19, P > 0.05). Cystic echinococcosis was the predominant type in students with echinococcosis (93.78%, 422/450), while alveolar echinococcosis was the predominant type in herders with echinococcosis (72.16%, 801/1 110). There was a significant difference in the constituent ratio of echinococcosis types between students and herders ([χ2] = 588.57, P < 0.05). In addition, higher prevalence of echinococcosis was detected in nomadic populations (4.58%, 1 008/22 021) than in community⁃dwelling populations (2.83%, 605/21 341) ([χ2] = 91.88, P < 0.05). The Echinococcus copro⁃antigen⁃positive rate was 0.19% (4/2 157) in owned dogs, and the detection rate of echinococcosis was 8.00% (16/200) in yaks and 3.10% (31/1 000) in rodents in 2019. Conclusions　Echinococcosis is highly prevalent in Serthar County, Sichuan Province. Sustained management of source of Echinococcus infections, improved treatment of echinococcosis patients and timely health education for nomadic populations are recommended.

Key words: Echinococcosis, Epidemiological survey, Serthar County

摘要： 目的　了解2019年四川省色达县棘球蚴病流行情况，为优化棘球蚴病控制措施提供参考依据。方法　2016—2019年对四川省色达县2周岁以上常住人口开展棘球蚴病调查，2019年调查家犬、牦牛和啮齿类动物棘球蚴感染情况，分析人群和动物棘球蚴病流行病学特征。结果　2016—2019年色达县人群棘球蚴病总患病率为3.72%（1 613/43 362），其中细粒棘球蚴病、多房棘球蚴病和混合型棘球蚴病患病率分别为1.72%（745/43 362）、1.98%（860/43 362）和0.02%（8/43 362）。牧区居民棘球蚴病患病率为4.13%（1 577/38 149），显著高于半农半牧区（0.69%，36/5 213）（[χ2] = 151.82，P < 0.05）；男、女性人群棘球蚴病患病率分别为3.76%（819/21 787）和3.68%（794/21 575），差异无统计学意义（[χ2] = 0.19，P > 0.05）。学生患病类型以细粒棘球蚴病为主，占93.78%（422/450）；牧民患病类型以多房棘球蚴病为主，占72.16%（801/1 110），患病类型差异有统计学意义（[χ2] = 588.57，P < 0.05）。游牧人群棘球蚴病患病率为4.58%（1 008/22 021），显著高于定居人群（2.83%，605/21 341）（[χ2] = 91.88，P < 0.05）。2019年家犬棘球绦虫抗原阳性率为0.19%（4/2 157），牦牛棘球蚴病检出率为8.00%（16/200），啮齿类动物棘球蚴病检出率为3.10%（31/1 000）。结论　四川省色达县棘球蚴病流行较严重；需持续加强传染源控制，强化对患病人群救治力度，及时加强对游牧人群及宗教人士的健康教育工作。

关键词: 棘球蚴病, 流行病学调查, 色达县