Department of Public Health, State University of Ceará, Fortaleza, Brazil.
Trop Med Int Health. 2010 Dec;15(12):1525-32. doi: 10.1111/j.1365-3156.2010.02658.x. Epub 2010 Nov 5.
In Northeast Brazil, large domestic containers used to store water are important breeding sites of Aedes aegypti, the main vector of dengue fever. The objective of this study was to estimate the survival of Betta splendens (Perciformes: Osphronemidae) fish in domestic containers in Fortaleza (Ceará State), as well as its effectiveness in the control of premature A. aegypti stages.
The use of B. splendens was compared to Bacillus thuringiensis israelensis (Bti) in domestic containers. In a first home visit, B. splendens or Bti were applied to water containers. Two follow-up visits were conducted after 3-4 and 5-6 months to assess the presence of viable fish in the containers and infestation by larvae. Betta splendens fish were still present in 97.6% of containers 45-60 days after application. When the fish was present, the infestation rate was significantly higher (P < 0.001) in the Bti group (IR ratio= 21.60; 95% CI: 6.46-72.28). In deposits where the fish remained, efficacy was 85% better than Bti. The permanence of fish was higher in concrete tanks (48.5%) located outside the house (47.5%) and at ground level (53.3%). We conclude that B. splendens may be suitable for biological control of A. aegypti larvae in large domestic water containers, but that appropriate measures should be taken to assure prolonged survival and the presence of fish in the containers.
在巴西东北部，用于储存水的大型家用容器是埃及伊蚊的重要滋生地，埃及伊蚊是登革热的主要传播媒介。本研究的目的是估计彩裙鱼（鲈形目：攀鲈科）在福塔莱萨（塞阿拉州）家用容器中的存活率，以及其控制过早出现的埃及伊蚊幼虫阶段的效果。
将彩裙鱼的使用与苏云金芽孢杆菌以色列亚种（Bti）在家庭容器中的使用进行了比较。在第一次家访中，将彩裙鱼或 Bti 应用于水容器中。在 3-4 个月和 5-6 个月后进行了两次随访，以评估容器中是否存在存活的鱼和幼虫感染情况。彩裙鱼在应用后 45-60 天仍存在于 97.6%的容器中。当鱼存在时，Bti 组的感染率显著更高（P<0.001）（IR 比值=21.60；95%CI：6.46-72.28）。在鱼仍然存在的沉积物中，其效果比 Bti 好 85%。鱼的持久性在室外（47.5%）和地面（53.3%）的混凝土水箱（48.5%）中更高。我们得出结论，彩裙鱼可能适合用于控制大型家用储水容器中的埃及伊蚊幼虫，但应采取适当措施确保鱼在容器中的长期存活和存在。
