Micieli María Victoria, Campos Raúl Ernesto
Centro de Estudios Parasitológicos y de Vectores, Universidad Nacional de La Plata, Buenos Aires, Argentina.
Mem Inst Oswaldo Cruz. 2003 Jul;98(5):659-63. doi: 10.1590/s0074-02762003000500013. Epub 2003 Sep 8.
Monthly oviposition activity and the seasonal density pattern of Aedes aegypti were studied using larvitraps and ovitraps during a research carried out by the Public Health Ministry of Salta Province, in Tartagal, Aguaray and Salvador Mazza cities, in subtropical Argentina. The A. aegypti population was active in both dry and wet seasons with a peak in March, accordant with the heaviest rainfall. From May to November, the immature population level remained low, but increased in December. Ae. aegypti oviposition activity increased during the fall and summer, when the relative humidity was 60% or higher. Eggs were found in large numbers of ovitraps during all seasons but few eggs were observed in each one during winter. The occurrence and the number of eggs laid were variable when both seasons and cities were compared. The reduction of the population during the winter months was related to the low in the relative humidity of the atmosphere. Significant differences were detected between oviposition occurrences in Tartagal and Aguaray and Salvador Mazza cities, but no differences in the number of eggs were observed. Two factors characterize the seasonal distribution pattern of Ae. aegypti in subtropical Argentina, the absence of a break during winter and an oviposition activity concomitant of the high relative humidity of the atmosphere.
在阿根廷亚热带地区的塔尔塔加尔、阿瓜拉伊和萨尔瓦多·马扎等城市，萨尔塔省公共卫生部开展了一项研究，期间使用幼虫诱捕器和产卵诱捕器对埃及伊蚊的月度产卵活动和季节性密度模式进行了研究。埃及伊蚊种群在旱季和雨季均有活动，3月出现高峰，这与降雨量最大的时期一致。从5月到11月，未成熟种群数量维持在较低水平，但在12月有所增加。埃及伊蚊的产卵活动在秋季和夏季增加，此时相对湿度为60%或更高。在所有季节的大量产卵诱捕器中都发现了卵，但在冬季每个诱捕器中观察到的卵很少。当比较季节和城市时，卵的出现情况和产卵数量存在差异。冬季月份种群数量的减少与大气相对湿度较低有关。在塔尔塔加尔、阿瓜拉伊和萨尔瓦多·马扎等城市的产卵情况之间检测到显著差异，但在卵的数量上未观察到差异。有两个因素表征了阿根廷亚热带地区埃及伊蚊的季节性分布模式，即冬季无间断以及产卵活动与大气高相对湿度相伴。
