Baruah S, Dutta P
Department of Zoology, Shwahid Peoli Phukon College, Namti, Sivasagar, Assam, India.
Trop Biomed. 2013 Sep;30(3):434-43.
In Dibrugarh district, one of the most populous districts of Assam, there is a potential risk of dengue virus transmission by the mosquito Aedes aegypti during the autumn, in the urban and industrial areas of the district. The seasonal patterns of oviposition activity and abundance of breeding sites of this vector were studied in two areas of the district. From January 2010 to December 2010, we examined a total of 767 ovitraps and 6562 water filled containers. Both study areas showed high percentages of positive ovitraps (urban: 18.2% and industrial: 45.08%) and positive breeding sites (urban: 22.8% and industrial: 53.5%) for Aedes aegypti with higher abundance in the post monsoon season. In industrial areas, percentages of breeding sites and positive ovitraps were high as compared to the percentages in the urban areas. The percentages of breeding sites and the positive ovitraps are high in autumn when compared to the percentages of the other seasons. In both the areas and with both the methodologies the highest infestation levels were registered in October (ovitraps: 29.3% and 65.1%, breeding sites: 27.5% and 65.2%). This highest abundance took place after heavy rainfall. A sharp decline in oviposition activity was observed when monthly room temperature decreased to16ºC with low rainfall (38 mm).
在阿萨姆邦人口最多的地区之一迪布鲁格尔区，该地区的城市和工业区在秋季存在埃及伊蚊传播登革热病毒的潜在风险。对该地区两个区域的这种媒介的产卵活动季节性模式和繁殖场所数量进行了研究。2010年1月至2010年12月，我们共检查了767个诱蚊产卵器和6562个盛水容器。两个研究区域的埃及伊蚊诱蚊产卵器阳性率（城市：18.2%，工业区：45.08%）和繁殖场所阳性率（城市：22.8%，工业区：53.5%）都很高，且在季风后季节数量更多。在工业区，繁殖场所和阳性诱蚊产卵器的比例高于城市地区。与其他季节相比，秋季的繁殖场所和阳性诱蚊产卵器比例较高。在两个区域以及两种方法中，10月份的侵扰水平最高（诱蚊产卵器：29.3%和65.1%，繁殖场所：27.5%和65.2%）。这种最高数量出现在暴雨之后。当月室温降至16ºC且降雨量较低（38毫米）时，观察到产卵活动急剧下降。
