营口地区自1979-1997年蚊虫监测中均发现三带喙库蚊,其密度每年不尽相同;但1998-2006年连续监测中未发现三带喙库蚊;2007-2008年蚊虫监测中又发现该蚊,而且密度较以往均有升高。据文献报道(景晓等,2008),媒介传染病流行发生之前,会出现媒介动物数量增多和季节消长异常现象。三带喙 Yingkou area from 1979 to 1997 mosquito monitoring were found in Culex tritaeniorhynchus, its density varies from year to year; but in 1998-2006 continuous monitoring did not find Culex tritaeniorhynchus; 2007-2008 mosquito surveillance was also found The mosquito, and the density have increased than in the past. It has been reported in the literature (Jing et al., 2008) that there will be an increase in the number of media animals and anomalous seasonal fluctuation before the spread of a vector-borne infectious disease occurs. Three beaks