Samuel P Philip, Thenmozhi V, Nagaraj J, Kumar T Dilip, Tyagi B K
Centre for Research in Medical Entomology (ICMR), Madurai, India.
J Vector Borne Dis. 2014 Dec;51(4):313-9.
BACKGROUND & OBJECTIVES: A longitudinal, entomological and virological study was conducted from 2007 to 2010 in four dengue fever affected areas of Thiruvananthapuram district, Kerala to understand the risk factors involved in the dengue transmission.
Aedes surveys were carried out seasonally in the selected localities both indoors and peridomestic sites. Water holding containers were sampled for the presence of immature. Outdoor and indoor resting/landing mosquitoes were collected. Blood meal identification was performed by gel diffusion test and viral assay using the ELISA test.
The species found were Aedes (Stegomyia) aegypti (Linn.), Ae. (Stegomyia) albopictus (Skuse) and Ae. (Stegomyia) vittatus (Bigot). Aedes aegypti and Ae. albopictus immature stages were also found during the study period. Aedes aegypti was the only prevalent species in the water-starved Vizhinjam, a rural coastal area with breteau index (BI) ranging from 40 to 271. Aedes albopictus was recorded in rest of the three surveyed localities—two urban and one rural ghat areas of Thiruvananthapuram district.
INTERPRETATION & CONCLUSION: The vector control measures should be focused mainly on source reduction of water storage containers present in both outdoor (Ae. albopictus and Ae. vittatus) and indoor (Ae. aegypti). To achieve effective vector management, a public health response beyond routine larviciding or focal spraying is essential throughout the year.
2007年至2010年期间，在喀拉拉邦特里凡得琅地区四个登革热疫区开展了一项纵向昆虫学和病毒学研究，以了解登革热传播的相关风险因素。
在选定地区的室内和住宅周边地区季节性开展伊蚊调查。对盛水容器进行采样以检查是否存在幼虫。收集室外和室内静息/停歇的蚊子。通过凝胶扩散试验进行血餐鉴定，并使用酶联免疫吸附测定法进行病毒检测。
发现的蚊种有埃及伊蚊（林奈）、白纹伊蚊（斯库斯）和条斑伊蚊（比戈特）。在研究期间还发现了埃及伊蚊和白纹伊蚊的幼虫阶段。埃及伊蚊是缺水的维辛贾姆地区唯一的优势蚊种，该地区为农村沿海地区，布雷图指数（BI）在40至271之间。在其他三个调查地区——特里凡得琅地区的两个城市地区和一个农村山区——记录到了白纹伊蚊。
病媒控制措施应主要侧重于减少室外（白纹伊蚊和条斑伊蚊）和室内（埃及伊蚊）储水容器的积水。为实现有效的病媒管理，全年都需要采取超出常规杀幼虫或局部喷洒范围的公共卫生应对措施。
