Kumawat Rina, Singh Karam V, Bansal S K, Singh Himmat
Desert Medicine Research Centre (ICMR), Jodhpur, India.
J Vector Borne Dis. 2014 Dec;51(4):320-6.
BACKGROUND & OBJECTIVES: In the absence of any commercially available dengue vaccine or antiviral therapy, controlling the primary mosquito vector, Aedes aegypti, is currently the only means to prevent dengue outbreaks. Ovitraps are being employed as a sensitive method for detecting the presence of Ae. aegypti. Size, colour, material, paddle and use of oviposition attractant have been reported as important factors influencing the efficacy of ovitraps.
For the study of coloured ovitraps baited with grass infusion, 24 households were randomly selected in a locality and five ovitraps/premises were installed. Weekly ovitrap surveys were conducted during the study for four times. Ovitrap data were analyzed on the basis of its location, day-wise percent positivity, presence of eggs laid and inference of different ovitrap parameters were drawn.
Grass infusion, used in the ovitraps has highest attractiveness on Day 6 in comparison to other days. Percent positivity of different coloured ovitraps revealed that red coloured ovitraps have highest positivity (92.7%), followed by black and orange (91.7% each), green (76.3%) and transparent (45.8%). The individual colour-wise ovitrap positivity revealed that the highest ovitrap positivity on Day 1 was recorded for black colour (21.8%), which on D2 and D3, in case of red colour (37.5 and 26%). However, on D4, D5 and D6 highest number of positive ovitraps was recorded in orange coloured (12.5, 21.9 and 31.3%, respectively) and on D7 highest number of positive ovitraps were recorded in transparent (21.9%), followed by green coloured ovitrap (20.8%). The overall location-wise ovitraps positivity revealed that highest positivity was recorded among the ovitraps installed inside bathrooms (92.0%), followed by bedrooms (85.0%), lobby (66.7%) and stores (48.3%).
INTERPRETATION & CONCLUSION: The study revealed that for immediate detection of the presence of gravid females in a particular locality during epidemics, the black coloured ovitraps may be useful, however, in normal situations for surveillance of the vector species, the orange coloured ovitraps might be more suitable. Bathrooms were found to be the highest positive location for pitching ovitraps.
由于目前尚无市售的登革热疫苗或抗病毒疗法，控制主要蚊虫媒介埃及伊蚊是预防登革热暴发的唯一手段。诱蚊产卵器正被用作检测埃及伊蚊存在的一种灵敏方法。诱蚊产卵器的大小、颜色、材质、桨叶以及产卵引诱剂的使用已被报道为影响诱蚊产卵器功效的重要因素。
为研究用草浸液诱饵的彩色诱蚊产卵器，在一个地点随机选择24户家庭，每户安装5个诱蚊产卵器。在研究期间每周进行一次诱蚊产卵器调查，共进行4次。根据诱蚊产卵器的位置、每日阳性率、产卵情况对诱蚊产卵器数据进行分析，并得出不同诱蚊产卵器参数的推断。
与其他日期相比，诱蚊产卵器中使用的草浸液在第6天具有最高的吸引力。不同颜色诱蚊产卵器的阳性率显示，红色诱蚊产卵器的阳性率最高（92.7%），其次是黑色和橙色（均为91.7%）、绿色（76.3%）和透明色（45.8%）。按颜色分类的单个诱蚊产卵器阳性率显示，第1天黑色诱蚊产卵器的阳性率最高（21.8%），第2天和第3天红色诱蚊产卵器的阳性率最高（分别为37.5%和26%）。然而，在第4天、第5天和第6天，橙色诱蚊产卵器的阳性诱蚊产卵器数量最多（分别为12.5%、21.9%和31.3%），第7天透明色诱蚊产卵器的阳性诱蚊产卵器数量最多（21.9%），其次是绿色诱蚊产卵器（20.8%）。按位置分类的诱蚊产卵器总体阳性率显示，安装在浴室中的诱蚊产卵器阳性率最高（92.0%），其次是卧室（85.0%）、大厅（66.7%）和商店（48.3%）。
该研究表明，在疫情期间要立即检测特定地点是否存在孕蚊，黑色诱蚊产卵器可能有用，然而，在正常情况下监测媒介物种时，橙色诱蚊产卵器可能更合适。发现浴室是放置诱蚊产卵器阳性率最高的地点。
