2021年10月,塞内加尔北部罗索的一次登革热爆发:2021年10月:昆虫学调查
Babacar Diouf1, Alioune Gaye1, Idrissa Dieng2
1Pôle de Zoologie Médicale, Institut Pasteur de Dakar, Dakar 220, Senegal.
Journal of medical entomology
|September 13, 2023
概括
塞内加尔的登革热爆发与埃及蚊虫有关,其高幼虫指数表明传播风险. 持续的传播媒介控制对于预防未来的流行病至关重要.
科学领域:
- 医学昆虫学 医学昆虫学
- 热带公共卫生热带公共卫生
- 传染病流行病学 传染病流行病学
背景情况:
- 塞内加尔面临着反复出现的登革热流行病,特别是在城市环境中,最近的发病率增加.
- 关于该地区关键登革热载体的当地生态和行为的数据有限.
- 2021年10月,塞内加尔北部出现登革热疫情,引发了一项昆虫学调查.
研究的目的:
- 确定塞内加尔北部的登革热病毒传播风险地区.
- 确定导致登革热爆发的主要蚊子载体.
- 评估有助于载体扩散和疾病传播的生态因素.
主要方法:
- 在室内和室外环境中收集了成年蚊子 (Aedes aegypti).
- 在含有水的容器中进行了幼虫调查,重点是储水容器.
- 蚊子使用快速诊断测试 (RDT) 进行了登革热病毒NS1抗原测试,通过RT-PCR和全基因组测序证实了阳性结果.
主要成果:
- 观察到高的布雷托和集装箱指数,在大多数调查地区超过了世卫组织的风险值.
- 发现主要的登革热载体Aedes aegypti在室内和室外都活跃,昼夜咬人.
- 登革热病毒血清型1 (DENV-1) 被确定为疫情的致病原体,在22个蚊子池中检测到NS1抗原.
结论:
- 这项研究突出了Aedes aegypti在塞内加尔登革热传播中的重要作用.
- 针对成年和幼虫蚊子阶段的持续控制策略对于预防登革热至关重要.
- 快速诊断测试 (RDTs) 显示出有前途,作为登革热诊断和监测工作的有价值工具.
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