Masuh Héctor, Seccacini Emilia, Zerba Eduardo, Licastro Susana A
Centro de Investigaciones de Plagas e Insecticidas, Juan Bautista La Salle 4397, 1603 Villa Martelli, Buenos Aires, Argentina.
Parasitol Res. 2008 Jun;103(1):167-70. doi: 10.1007/s00436-008-0945-0.
To study the seasonal fluctuations of populations of Aedes aegypti (L.), to improve control strategies, or to monitor chemical control interventions, a lightweight, inexpensive ovitrap made of black plastic, pail-shaped, stackable, and provided with a wood tongue depressor was used. Field assays were performed in the northeast and northwest part of Argentina. In a 1-year trial performed in Tartagal (Salta), almost 100% of the ovitraps were highly positive, collecting a total of 1,000/2,000 eggs during March and the first part of April. A focal treatment in the corresponding neighborhood, performed at this time, immediately began to reduce positive ovitraps in spite of the high temperatures registered, rising again in November after winter season. Another field trial was performed in the whole urban area of Iguazú (Misiones). Mosquito populations were evaluated after three weekly ultra low volume (ULV) applications with an EC formulation of permethrin in water. The number of positive ovitraps diminished from 49% to 10% after the treatments. The last one performed in Wanda (Misiones) showed that positive ovitraps inside the dwellings aided in determining reinfestation rates after an intervention with a smoke-generating formulation containing beta-cypermethrin. The work performed in three different situations in urban areas at high risk of dengue can be considered a preliminary assay to establish the effective performance of simple ovitraps, allowing the Vector Control Service of the Argentinian Ministry of Health its use to improve surveillance and control strategies.
为了研究埃及伊蚊种群的季节性波动、改进控制策略或监测化学控制干预措施，使用了一种由黑色塑料制成的、桶形、可堆叠且配有木质压舌板的轻便、廉价的诱蚊产卵器。在阿根廷的东北部和西北部进行了现场试验。在萨尔塔省塔尔塔加尔进行的为期1年的试验中，几乎100%的诱蚊产卵器呈高度阳性，在3月和4月上旬共收集到1000/2000枚卵。此时在相应社区进行的重点处理，尽管当时气温很高，但立即开始减少呈阳性的诱蚊产卵器数量，在冬季过后的11月又再次上升。在伊瓜苏市（米西奥内斯省）的整个市区进行了另一项现场试验。在用氯菊酯乳油制剂进行三次每周超低容量（ULV）喷洒后，对蚊虫种群进行了评估。处理后呈阳性的诱蚊产卵器数量从49%降至10%。在万达（米西奥内斯省）进行的最后一项试验表明，在使用含有高效氯氰菊酯的烟雾发生制剂进行干预后，住宅内呈阳性的诱蚊产卵器有助于确定再感染率。在登革热高风险城市地区的三种不同情况下开展的这项工作，可被视为一项初步试验，以确定简单诱蚊产卵器的有效性能，从而使阿根廷卫生部病媒控制服务部门能够利用其改进监测和控制策略。
