Salas-Luévano M A, Reyes-Villanueva F
Universidad Autónoma de Zacatecas, Centro de Investigaciones Biomédicas, México.
Salud Publica Mex. 1994 Jul-Aug;36(4):385-92.
Seasonal variation of the populations of the dengue vector mosquito Aedes aegypti, in the city of Monterrey, N.L., Mexico, showed a bimodal pattern. The first peak is lower and appeared at early June, while the second and higher one was observed in the second week of October. 1,419 female mosquitoes were caught in this study. Females with fresh red blood in the stomach were present in all the catches, gravid females (mature eggs in the ovaries) being more abundant than the non-gravid ones. The gravid females with red blood are the oldest of the vector population. Nevertheless, in October, 40 per cent of females had red blood and of these, 37 per cent were gravid. In relation to the biting rate, a 10 females/hour-man rate was recorded for the first peak and a 13.3 females/hour-man rate for the second one. There were 32 per cent of females involved in multiple feedings during the weekly catches. This incidence increases to 40 per cent in October. These rates were calculated on the basis of females with fresh blood in the stomach; from these the gravids and non-gravids have at least three and two multiple feedings, respectively. Finally the epidemiological importance of these multiple feedings on dengue transmission is discussed.
墨西哥新莱昂州蒙特雷市登革热传播媒介埃及伊蚊种群的季节性变化呈现双峰模式。第一个峰值较低，出现在6月初，而第二个也是较高的峰值出现在10月的第二周。本研究共捕获1419只雌蚊。所有捕获的蚊子中都有胃内含有新鲜红色血液的雌蚊，怀卵雌蚊（卵巢中有成熟卵）比未怀卵雌蚊更为常见。胃内有红色血液的怀卵雌蚊是传播媒介种群中最年长的。然而，在10月份，40%的雌蚊胃内有红色血液，其中37%为怀卵雌蚊。关于叮咬率，第一个峰值记录为每小时每捕蚊人10只雌蚊，第二个峰值为每小时每捕蚊人13.3只雌蚊。每周捕获的蚊子中有32%的雌蚊进行多次叮咬。这一比例在10月份增至40%。这些比率是根据胃内有新鲜血液的雌蚊计算得出的；从这些雌蚊来看，怀卵雌蚊和未怀卵雌蚊分别至少有三次和两次多次叮咬。最后讨论了这些多次叮咬对登革热传播的流行病学重要性。
