温州市蝇类种群密度季节消长与肠道传染病发病关系分析

Relationship between the seasonal fluctuations in fly population and density and the incidence of intestinal infectious diseases in Wenzhou

目的了解蝇类密度季节消长变化与肠道传染病发病的关系,为实施肠道传染病预防和控制策略提供科学依据。方法于2006-2008年用笼诱法监测温州市蝇类种群、密度季节消长变化情况,收集温州市2006-2008年霍乱、甲型肝炎、戊型肝炎、痢疾、伤寒、副伤寒和其他感染性腹泻病等肠道传染病发病资料,用相关分析方法分析蝇类与肠道传染病的关系。结果笼诱法监测到的温州市主要蝇类有家蝇、绿蝇(丝光绿蝇和铜绿蝇)和大头金蝇等,家蝇为优势种,密度高峰期在6-10月,为14.37只/(笼.6h);蝇类密度消长与肠道传染病发病呈正相关关系,其中蝇类与感染性腹泻和伤寒呈正相关关系(r=0.875,P<0.01;r=0.760,P<0.01),与霍乱、痢疾和副伤寒也有一定相关关系(r=0.694,P<0.05;r=0.671,P<0.05;r=0.616,P<0.05),而与戊型肝炎存在负相关关系(r=-0.616,P<0.05),与甲型肝炎无相关关系。结论温州市肠道传染病发病与蝇类有相关性,应采取综合性防制措施控制蝇类密度,预防和控制肠道传染病流行。

Objective The relationship between the seasonal fluctuations in fly density and the incidence of intestinal infectious diseases was investigated to provide basis for implementation of the prevention and control strategies for food-borne diseases.Methods The seasonal fluctuations of fly population and density were monitored using cage traps from 2006 to 2008 in Wenzhou.Data on the incidence of cholera,hepatitis A,hepatitis E,dysentery,typhoid,paratyphoid fever and other intestinal infectious diseases such as diarrhea over the corresponding period in Wenzhou were collected for correlation analysis of the relationship between flies and intestinal infections diseases.Results The major species of flies detected in Wenzhou using cage traps included houseflies（Musca domestica）,green flies（Lucilia sericata and Lucilia cuprina） and Chrysomya megacephala,houseflies being the dominant ones.The fly density peaked from June to October with a density of 14.37/cage 6 h.A positive correlation was found between the fluctuations in fly density and the incidence of intestinal infectious diseases,of which flies were positively correlated with infectious diarrhea and typhoid fever（r=0.875,P0.01;r=0.760,P0.01） and correlated to certain degree with cholera,dysentery and paratyphoid（r=0.694,P0.05;r=0.671,P0.05;r=0.616,P0.05）,though negatively correlated with hepatitis E（r=-0.616,P0.05） and not correlated with hepatitis A.Conclusion The incidence of intestinal infectious diseases was correlated with the flies in Wenzhou.Therefore,comprehensive control measures should be taken to control the fly density for the prevention and control of intestinal infectious diseases.