Souza-Santos R
Departamento de Endemias Samuel Pessoa, Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz, Rio de Janeiro, Brasil.
Rev Soc Bras Med Trop. 1999 Jul-Aug;32(4):373-82. doi: 10.1590/s0037-86821999000400007.
Aedes aegypti is the vector of dengue, a disease that can result in epidemics. Ecological studies are important because different geographical populations of the vector may differ in their bioecological characteristics, which can be helpful in guiding control actions. The objective of this study was to identify and to analyze some factors associated with the occurrence of immature forms of A. aegypti on Ilha do Governador, Rio de Janeiro, using data from the National Health Foundation (FNS). The results showed that 58.04% of all the containers examined were supports for plant pots, and plastic or glass cans discarded in the yard. The highest percentages of positive breeding sites were observed in tires (1.41%), wells and cisterns (0.93%), and barrels and large metal cans (0.64%). In the summer, the proportion of positivity was higher for big containers used for water storage and for containers discarded in the yard. In the winter the proportion was higher for small containers used for water storage. The highest rates of positive containers were observed after three months without FNS activities. Our results show the necessity to continue the control, and suggest that less attention was paid to small containers during the winter by FNS. Factorial analysis showed that the determinant factor for the occurrence of immature forms of A. aegypti is represented by environmental factors, while elimination and treatment of breeding sites by FNS play a less important role, a fact possibly causing the maintenance of immature forms of A. aegypti.
埃及伊蚊是登革热的传播媒介，登革热可引发流行病。生态学研究很重要，因为该传播媒介的不同地理种群在生物生态学特征上可能存在差异，这有助于指导防控行动。本研究的目的是利用国家卫生基金会（FNS）的数据，识别并分析与里约热内卢州长岛埃及伊蚊幼虫出现相关的一些因素。结果显示，所有检查的容器中有58.04%是花盆支架，以及丢弃在院子里的塑料或玻璃罐。在轮胎（1.41%）、水井和蓄水池（0.93%）以及桶和大金属罐（0.64%）中观察到阳性滋生地的比例最高。在夏季，用于储水的大容器和丢弃在院子里的容器阳性比例较高。在冬季，用于储水的小容器阳性比例较高。在FNS停止活动三个月后，观察到阳性容器的比例最高。我们的结果表明有必要继续进行防控，并表明FNS在冬季对小容器的关注较少。因子分析表明，埃及伊蚊幼虫出现的决定性因素是环境因素，而FNS对滋生地的清除和处理作用较小，这一事实可能导致埃及伊蚊幼虫持续存在。
