Dipartimento di Sanità Pubblica e Malattie Infettive, "Sapienza" Università di Roma, Piazzale Aldo Moro 5, 00185, Rome, Italy.
Biotechnology and Biological Control Agency (BBCA) Onlus, Via Angelo Signorelli 105, 00123, Rome, Italy.
Sci Rep. 2019 Jul 16;9(1):10281. doi: 10.1038/s41598-019-46466-4.
The increasing number of exotic arbovirus cases imported in Europe and the 2017 chikungunya outbreak in central/southern Italy highlight the urgency of evidence-based outbreak management plans to predict, prevent or interrupt spreading of these arboviruses to non-endemic countries in temperate regions. We here present the results of three mark-release-recapture experiments conducted in a peri-urban area of North-East Italy to estimate the spatio-temporal dynamics of the dispersal of Aedes albopictus females looking for oviposition sites. The Flight Range of 90% of the mosquito population (FR) was found to exceed 200 m, consistently with data obtained from a previous study conducted in a highly urbanised area in Rome (Central Italy). Modelling results showed that dispersal can be so rapid that insecticide spraying within a 200m-radius around a potential infected case leaves >10% probability that a potentially infected mosquito escapes the treatment, even if this is carried out after only 2-3 days since the importation of a viremic case. These data provide evidence in favour of an update of guidelines for the control of exotic autochthonous arbovirus transmission in temperate areas and highlight the need of effective surveillance approaches and rapid response to contain the risks associated to imported viremic cases.
欧洲输入性外来虫媒病毒病例的数量不断增加，以及 2017 年意大利中南部基孔肯雅热的爆发，突显了制定基于证据的暴发管理计划的紧迫性，以预测、预防或阻止这些虫媒病毒传播到温带非流行地区。我们在此介绍了在意大利东北部一个城郊地区进行的三项标记释放捕获实验的结果，这些实验旨在估计白纹伊蚊雌性寻找产卵地的扩散的时空动态。发现 90%的蚊子种群的飞行范围（FR）超过 200 米，这与在意大利罗马（意大利中部）一个高度城市化地区进行的先前研究中获得的数据一致。建模结果表明，扩散速度非常快，以至于在潜在感染病例周围 200 米半径范围内进行杀虫剂喷洒，超过 10%的可能性是潜在感染的蚊子会逃脱处理，即使这是在输入病毒血症病例后仅 2-3 天进行的。这些数据为更新温带地区外来虫媒病毒传播控制指南提供了证据，并强调需要有效的监测方法和快速反应来控制输入性病毒血症病例带来的风险。
