Abstract
ObjectivesLarval indices have been used for Ae. albopictus surveillance for many years, while there is limited use in assessing dengue transmission risk and adult mosquito emergence. This study is aimed to explore the relationships between larval indices and the Ae. albopictus density captured by BG-mosquito trap (BG-trap) method, with considering the meteorological factors.MethodsData on larval density, adult mosquito density and meteorology factors were collected in an entomological survey carried out in Quzhou City, Zhejiang Province of China in 2018. The Spearman’s rank correlation and Pearson correlation were used for the analysis on the correlation of density indices. Generalized additive models were established to analyze the influencing factors of mosquito density.ResultsBreteau index (BI), House index (HI) and Container index (CI) were highly correlated with each other (r>0.7, p<0.05). The Ae. albopictus density was significantly correlated with CI (rs = 0.260, p<0.05), CI pre one week (rs = 0.259, p<0.05), and CI pre three weeks (rs = 0.329, p<0.05). BI was correlated with female Ae. albopictus density pre 4 weeks (r = -0.299, p<0.05). Female Ae. albopictus density was correlated with CI pre 3 weeks (rs = 0.303, p<0.05). The influencing factors of BI were average wind speed pre 1 week, average temperature and female Ae. albopictus density pre 4 weeks. The influencing factors of CI were average humidity pre 3 weeks and average temperature. The influencing factors of HI were average temperature and precipitation pre 4 weeks. The influencing factor of Ae. albopictus density and female Ae. albopictus density was temperature.ConclusionsThe adult Ae. albopictus density had low correlation with certain larval indices. Some of the meteorology factors played significant roles in the density of adult Ae. albopictus and larva with or without a time lag.
Highlights
Aedes albopictus (Skuse), the Asian tiger mosquito, is one of the most invasive insect species in the world with substantial biting activity and high disease vector potential [1]
The Ae. albopictus density was significantly correlated with Container index (CI), CI pre one week, and CI pre three weeks
Breteau index (BI) was correlated with female Ae. albopictus density pre 4 weeks (r = -0.299, p
Summary
Aedes albopictus (Skuse), the Asian tiger mosquito, is one of the most invasive insect species in the world with substantial biting activity and high disease vector potential [1]. In over 100 countries of the tropics and subtropics, dengue fever is mainly transmitted by Ae. aegypti and Ae. albopictus [3,4]. In the absence of vaccinations and effective drugs, the prevention and control of dengue fever are still focused on the elimination of the mosquito populations [7,8]. From this perspective, developing appropriate strategies to monitor and control the Ae. albopictus populations should be a priority
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