Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro, RJ, Brazil.
Mem Inst Oswaldo Cruz. 2009 Sep;104(6):927-32. doi: 10.1590/s0074-02762009000600019.
Different urban structures might affect the life history parameters of Aedes aegypti and, consequently, dengue transmission. Container productivity, probability of daily survival (PDS) and dispersal rates were estimated for mosquito populations in a high income neighbourhood of Rio de Janeiro. Results were contrasted with those previously found in a suburban district, as well as those recorded in a slum. After inspecting 1,041 premises, domestic drains and discarded plastic pots were identified as the most productive containers, collectively holding up to 80% of the total pupae. In addition, three cohorts of dust-marked Ae. aegypti females were released and recaptured daily using BGS-Traps, sticky ovitraps and backpack aspirators in 50 randomly selected houses; recapture rate ranged from 5-12.2% within cohorts. PDS was determined by two models and ranged from 0.607-0.704 (exponential model) and 0.659-0.721 (non-linear model), respectively. Mean distance travelled varied from 57-122 m, with a maximum dispersal of 263 m. Overall, lower infestation indexes and adult female survival were observed in the high income neighbourhood, suggesting a lower dengue transmission risk in comparison to the suburban area and the slum. Since results show that urban structure can influence mosquito biology, specific control strategies might be used in order to achieve cost-effective Ae. aegypti control.
不同的城市结构可能会影响埃及伊蚊的生活史参数，并因此影响登革热的传播。本研究估计了里约热内卢一个高收入社区的蚊群的容器生产力、每日存活率（PDS）和扩散率。结果与之前在郊区和贫民窟发现的结果进行了对比。在检查了 1041 个场所后，发现家庭排水渠和废弃的塑料盆是最具生产力的容器，总共容纳了多达 80%的总蛹。此外，使用 BGS 陷阱、粘性诱卵器和背包吸气器，每天在 50 个随机选择的房屋中释放并重新捕获三批用灰尘标记的埃及伊蚊雌性，重新捕获率在各批之间为 5-12.2%。PDS 通过两种模型确定，范围分别为 0.607-0.704（指数模型）和 0.659-0.721（非线性模型）。平均移动距离从 57-122 米不等，最大扩散距离为 263 米。总体而言，在高收入社区观察到较低的感染指数和成年雌性存活率，这表明与郊区和贫民窟相比，该地区的登革热传播风险较低。由于研究结果表明城市结构会影响蚊子的生物学特性，因此可以使用特定的控制策略来实现具有成本效益的埃及伊蚊控制。
