Surendran Sinnathamby N, Kajatheepan Arunasalam, Sanjeefkumar Karunakaran F A, Jude Paviluppillai J
Department of Zoology, Faculty of Science, University of Jaffna, Jaffna, Sri Lanka.
Southeast Asian J Trop Med Public Health. 2007 Mar;38(2):276-82.
With the backdrop of a high incidence of dengue in Jaffna District, Sri Lanka, an ovitrap based survey was carried out from May 2005 to April 2006 in a residential area to study the seasonality and insecticide susceptibility of Aedes aegypti and Ae. albopictus. Conventional ovitraps were placed inside and outside of 10 randomly selected houses to collect indoor breeding and outdoor breeding Aedes mosquitoes; collections took place fortnightly. A total of 3075 Ae. aegypti and 2665 Ae. albopictus were collected in outdoor ovitraps, whereas in indoor ovitraps a total of 2528 Ae. aegypti and 2002 Ae. albopictus were collected. The highest values for Aedes density and positive ovitrap percentage were recorded in January 2006. A seasonal shift was observed in the density of Ae. aegypti and Ae. albopictus. Ae aegypti density was high during and after the Northeast monsoon whilst Ae. albopictus was the dominant species during the onset of the Northeast monsoon. A significant association (p < 0.05) between Aedes density and rainfall was observed. The association of these two species to site, either indoors or outdoors, was not statistically significant (p > 0.05). Both the species were found to be highly resistant to 4% DDT and completely susceptible to 5% malathion. The high prevalence and the ability of both species to breed indoors and outdoors should be taken into account when formulating a dengue vector control program with community participation in the Jaffna District, Sri Lanka.
在斯里兰卡贾夫纳地区登革热高发的背景下，于2005年5月至2006年4月在一个居民区开展了一项基于诱蚊产卵器的调查，以研究埃及伊蚊和白纹伊蚊的季节性及对杀虫剂的敏感性。在随机选取的10所房屋的室内和室外放置传统诱蚊产卵器，以收集在室内和室外繁殖的伊蚊；每两周收集一次。室外诱蚊产卵器共收集到3075只埃及伊蚊和2665只白纹伊蚊，而室内诱蚊产卵器共收集到2528只埃及伊蚊和2002只白纹伊蚊。2006年1月记录到伊蚊密度和诱蚊产卵器阳性率的最高值。观察到埃及伊蚊和白纹伊蚊的密度存在季节性变化。埃及伊蚊在东北季风期间及之后密度较高，而白纹伊蚊在东北季风开始时是优势种。观察到伊蚊密度与降雨量之间存在显著关联（p<0.05）。这两个物种与室内或室外场所的关联在统计学上不显著（p>0.05）。发现这两个物种对4%滴滴涕高度耐药，对5%马拉硫磷完全敏感。在制定斯里兰卡贾夫纳地区社区参与的登革热病媒控制计划时，应考虑到这两个物种在室内和室外的高繁殖率及繁殖能力。
