目的 掌握辽宁省营口市三带喙库蚊种类构成和季节消长,为流行性乙型脑炎防制提供科学依据。方法 2021－2023年5－10月,选择居民区、公园、医院、农户和牲畜棚5类监测生境,采用诱蚊灯法进行蚊虫密度监测,使用Excel 2010和SPSS 22.0软件对不同年份、生境数据差异进行ANOVA或Kruskal-Wallis H检验,数据方差齐性采用Levene检验。结果 2021－2023年三带喙库蚊构成比平均值为9.45%, 2021－2023年构成比从0.01%上升至26.12%,三带喙库蚊密度逐年增加,年平均密度从0.02只/（灯·夜）上升至44.25只/（灯·夜）,密度高峰在8－9月。2021－2023年,不同年份蚊密度季节消长差异有统计学意义（H=13.374,P=0.001）；2023年不同生境蚊密度差异有统计学意义（H=31.628,P<0.001）。结论 牲畜棚周边是营口地区三带喙库蚊重点防制生境,8－9月为防治重点月份,应做好三带喙库蚊的防蚊和灭蚊工作,以减少和避免流行性乙型脑炎的暴发与流行。
Objective To investigate the species composition and seasonal variations of Culex tritaeniorhynchus in Yingkou, Liaoning Province, China, so as to provide a scientific basis for the prevention and control of Japanese encephalitis. Methods From May to October during 2021 to 2023, mosquito density was monitored using the light trapping method in five habitats, including residential areas, parks, hospitals, rural households, and livestock sheds. Excel 2010 and SPSS 22.0 softwares were used to perform analysis of variance (ANOVA) and Kruskal-Wallis H tests on data from different years and habitats. Levene's test was used to assess the homogeneity of data. Results From 2021 to 2023, the mean constituent ratio of Cx. tritaeniorhynchus was 9.45%, increasing from 0.01% to 26.12%. Additionally, the density of Cx. tritaeniorhynchus increased annually, specifically, from 0.02 to 44.25 mosquitoes/light·night. The density peak occurred from August to September. From 2021 to 2023, there were significant differences in the seasonal variation of mosquito density between different years (H=13.374, P=0.001). In 2023, there were significant differences in mosquito density between different habitats (H=31.628, P<0.001). Conclusions In the prevention and control of Cx. tritaeniorhynchus in Yingkou, attention should be paid to livestock sheds as key habitats, particularly during August and September. Prevention and control of Cx. tritaeniorhynchus is essential to reduce the outbreak and spread of Japanese encephalitis.
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