关键词: 血吸虫病, 渔民, 影响因素, Logistic回归, B超

Abstract: Objective  To investigate schistosome infection among the professional fishermen in Yueyang County, East Dongting Lake Region and its influence factors.  Methods  A total of 275 fishermen from two fisherman villages in Yueyang County were selected in 2009. They were investigated by fecal examination and questionnairing. The stool-egg positive individuals were detected by B ultrasound. The multivariate unconditional Logistic regression analysis was used to explore the related factors of schistosome infection and liver in fishermen.  Results  The total infection rate in fishermen was 40.4%（111/275）, and the geometric mean of EPG was 17.4±4.4. B ultrasound data showed among 111 egg positive individuals, 39（35.1%） cases manifested as hepatomegaly, 22（19.8%） had splenomegaly, 11（9.9%） had portal vein expansion and 65（58.6%） had hepatic fibrosis. Multivariate unconditional Logistic regression analysis showed that age groups（OR=0.630）, fishing working years（OR=2.470）, chemotherapy frequency（OR=0.425） and chemotherapy in 2008（OR=0.290） were the influence factors on schistosome infection（P<0.01）.  Conclusion  Schistosome infection rate is high, Schistosoma japonicum-induced liver and spleen injuries are still severe in fisherman of Eastern Dongting Lake Region.

Key words: Schistosomiasis, Fisherman, Influence factor, Logistic regression, B ultrasound