Ndenga Bryson Alberto, Mutuku Francis Maluki, Ngugi Harun Njenga, Mbakaya Joel Omari, Mukoko Dunstan, Kitron Uriel, LaBeaud Angelle Desiree
Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya.
Department of Environment and Health Sciences, Technical University of Mombasa, Mombasa, Kenya.
Am J Trop Med Hyg. 2022 May 31;107(1):208-10. doi: 10.4269/ajtmh.21-0309.
This study examined whether Aedes aegypti extends its human blood seeking activity into night hours. Human landing catches (HLC) were conducted hourly from early morning (04:30) to late evening (21:30) in urban and rural sites in Kisumu County in western Kenya, and in Kwale County at the coast. Out of 842 female Ae. aegypti mosquitoes, 71 (8.5%) were collected at night (nocturnal), 151 (17.9%) at twilight (crepuscular), and 620 (73.6%) during the day (diurnal). Three-fold and significantly more Ae. aegypti female mosquitoes were collected during the twilight (crepuscular) hours than night (nocturnal) hours. Significantly more Ae. aegypti female mosquitoes were collected during daytime (diurnal) than night time (nocturnal). In general, the number of mosquitoes collected reduced as darkness increased. Extended time into the night to seek for blood meals enhances chances for Ae. aegypti to contact humans and transmit arboviruses diseases.
本研究调查了埃及伊蚊是否将其寻找人类血液的活动扩展至夜间。在肯尼亚西部基苏木县的城乡地区以及沿海的夸勒县，从清晨（04:30）至傍晚（21:30）每小时进行一次人饵诱捕（HLC）。在842只埃及伊蚊雌蚊中，71只（8.5%）在夜间（夜行性）捕获，151只（17.9%）在黄昏（晨昏性）捕获，620只（73.6%）在白天（昼行性）捕获。在黄昏（晨昏性）时段捕获的埃及伊蚊雌蚊数量是夜间（夜行性）时段的三倍且显著更多。在白天（昼行性）捕获的埃及伊蚊雌蚊数量显著多于夜间（夜行性）。总体而言，随着黑暗程度增加，捕获的蚊子数量减少。延长夜间寻找血餐的时间会增加埃及伊蚊接触人类并传播虫媒病毒疾病的机会。
