Diarrassouba S, Dossou-Yovo J
Organisation de coordination et de coopération pour la lutte contre les grandes endémies (OCCGE), Institut Pierre Richet, Bouaké, Côte d'Ivoire.
Bull Soc Pathol Exot. 1997;90(5):361-3.
Ae. aegypti is vector of many arboviruses of medical and/or economical importance. It transmits the yellow fever, dengue and Chikungunya viruses. Small water collections constitute its potential breeding sites. Three different populations of Ae. aegypti are known in Africa: a selvatic population breeding in tree holes and rock holes, a population breeding in discarded containers in peri-domestic area and a third population which breeds in drinking water containers and various receptacles inside habitations. The biting activity of this vector is diurnal in East Africa, but it occurs usually at sun set in West Africa. An entomological survey was carried out in a village situated in Sudan savannah zone of Côte d'Ivoire to appreciate Aedini populations in dry season. Mosquito collections were organized from 4 p.m. to 6 a.m. The results showed an atypical biting activity rhythm in dry season, characterized by a permanent activity during the whole night up to 6 a.m., a pronounced tendency to endophagy and a peak biting aggressivity at midnight inside as well as outside houses. The epidemiological implications of such an atypical rhythm of biting activity are analysed. It is suggested to appreciate the extent of this phenomenon through some more investigations in the villages of the area and determine the induced stegomyian focus.
埃及伊蚊是许多具有医学和/或经济重要性的虫媒病毒的传播媒介。它传播黄热病、登革热和基孔肯雅病毒。小面积积水是其潜在的繁殖场所。在非洲已知有三种不同的埃及伊蚊种群：一种在树洞和岩洞中繁殖的野生种群，一种在家庭周边地区废弃容器中繁殖的种群，以及第三种在饮用水容器和住所内各种容器中繁殖的种群。这种传播媒介在东非的叮咬活动是白天进行，但在西非通常发生在日落时。在科特迪瓦苏丹草原地区的一个村庄进行了一项昆虫学调查，以评估旱季伊蚊种群情况。蚊虫采集工作在下午4点至凌晨6点进行。结果显示旱季存在非典型的叮咬活动节律，其特点是直至凌晨6点整个夜间都有持续活动、明显的嗜内习性倾向以及在房屋内外午夜时分出现叮咬攻击性高峰。分析了这种非典型叮咬活动节律的流行病学意义。建议通过对该地区村庄进行更多调查来评估这一现象的程度，并确定由此引发的埃及伊蚊疫源地。
