Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz-Fiocruz, Av. Brasil 4365, 21045-900 Rio de Janeiro, RJ, Brazil.
Acta Trop. 2010 Apr;114(1):37-43. doi: 10.1016/j.actatropica.2010.01.001. Epub 2010 Jan 13.
Entomological surveys on Aedes aegypti (L.) often focus on residential premises, while ignoring non-residential premises. It has been proposed that the latter should be subject to specific monitoring strategies, since they have the potential to contribute a large proportion of the overall mosquito population. In this study, we used traps for ovipositing females to compare the levels of Ae. aegypti infestation in residential and non-residential premises and assess whether there was any evidence for a spatial association of infestation between non-residential premises and the surrounding homes. This information is important for designing specific surveillance programmes for these special sites and their surroundings. This study was conducted in three neighbourhoods of the city of Rio de Janeiro, Brazil, with distinct population densities, water services, dengue histories and vegetation coverage. Ae. aegypti abundance was measured using two types of traps (standard and sticky ovitraps) installed in five non-residential premises and 80 residential premises per neighbourhood. Mosquitoes were collected in the summer (January to March) and winter (June to September) of 2007. The distribution of captures per household per week did not differ significantly between the seasons, although larger numbers of eggs and adults were obtained during the summer. Most non-residential premises were not significantly more infested than homes, despite the larger quantities of containers. There were a few exceptions, including a transportation company, two recycling centres and a boat yard. These highly infested non-residential premises were also spatially associated with highly infested homes in the vicinity. Continuous monitoring with traps may be an effective way of evaluating non-residential premises as sources of dengue vectors for nearby communities.
登革热媒介伊蚊（Aedes aegypti）的昆虫学调查通常集中在住宅场所，而忽略了非住宅场所。有人提出，后者应该采用特定的监测策略，因为它们有可能对整体蚊子种群做出较大贡献。在本研究中，我们使用产卵雌性诱捕器来比较住宅和非住宅场所中登革热媒介伊蚊的感染程度，并评估非住宅场所与周围住宅之间的感染是否存在空间关联。这些信息对于为这些特殊场所及其周围地区设计特定的监测计划非常重要。本研究在巴西里约热内卢的三个街区进行，这些街区具有不同的人口密度、供水、登革热历史和植被覆盖。使用两种类型的诱捕器（标准和粘性诱卵器）在每个街区的五个非住宅场所和 80 个住宅场所中测量登革热媒介伊蚊的丰度。蚊子于 2007 年夏季（1 月至 3 月）和冬季（6 月至 9 月）采集。每周每个家庭捕获的蚊子分布在两个季节之间没有显著差异，尽管夏季获得的卵和成虫数量更多。尽管容器数量较多，但大多数非住宅场所的感染程度并不明显高于住宅。也有一些例外，包括一家运输公司、两个回收中心和一个船坞。这些高度感染的非住宅场所也与附近高度感染的住宅具有空间关联。使用诱捕器进行持续监测可能是评估非住宅场所作为附近社区登革热媒介来源的有效方法。
