Host Preferences and Impact of Climate on Blood Feeding in Anopheles funestus Group from South Africa.

IF 2.8 4区 医学 Q2 INFECTIOUS DISEASES
Tshiama Miriam Mwamba, Yael Dahan-Moss, Givemore Munhenga, Innocent Maposa, Lizette Leonie Koekemoer
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Abstract

Anopheles vaneedeni and Anopheles parensis (members of the An. funestus group) are generally not considered malaria vectors. However, both species were recently identified as potential vectors in South Africa. A critical factor needed to determine their role in malaria transmission is their preference for human blood. The human blood index of An. vaneedeni and An. parensis and their potential role in the ongoing residual malaria transmission in South Africa is unknown. This study aimed to identify host blood meals from the wild-caught An. funestus group in a longitudinal study, and to establish the relationship between temperature, relative humidity, and precipitation on host feeding preferences. Anopheles leesoni, An. parensis, An. vaneedeni, and Anopheles rivulorum were collected, and females mainly fed on cattle. Climatic parameters did not influence the host feeding preferences of these four members of the An. funestus group, but impacted the proportion of females that took a blood meal. Significant changes in feeding proportions were driven by relative humidity, temperature, and precipitation. The role of these species in the ongoing residual malaria transmission in South Africa needs further investigation, as no human blood meals were identified. It is recommended that vector surveillance teams incorporate climatic monitoring and host blood meal identification into their routine activities. This information could provide the malaria vector control programmes with scientific evidence to evaluate the importance of the An. funestus group in residual malaria transmission.

寄主偏好和气候对南非食血按蚊群体的影响
一般不认为 vaneedeni 按蚊和 parensis 按蚊(属于 An. funestus 类)是疟疾病媒。然而,这两个物种最近在南非被确认为潜在的病媒。确定它们在疟疾传播中的作用所需的一个关键因素是它们对人血的偏好。vaneedeni 和 An. parensis 的人血指数及其在南非持续残留疟疾传播中的潜在作用尚不清楚。本研究旨在通过纵向研究确定野生捕获的疟原虫群体的宿主血餐,并确定温度、相对湿度和降水对宿主取食偏好的关系。研究人员采集了疟原虫(Anopheles leesoni)、疟原虫(An. parensis)、疟原虫(An. vaneedeni)和疟原虫(Anopheles rivulorum),雌性疟原虫主要以牛为食。气候参数并不影响这四种疟原虫的摄食偏好,但会影响雌性疟原虫的血食比例。相对湿度、温度和降水会导致取食比例发生显著变化。由于没有发现人类血餐,这些物种在南非持续的残余疟疾传播中的作用还需要进一步调查。建议病媒监测小组将气候监测和宿主血餐鉴定纳入其日常活动中。这些信息可为疟疾病媒控制计划提供科学证据,以评估疟原虫群在残余疟疾传播中的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Tropical Medicine and Infectious Disease
Tropical Medicine and Infectious Disease Medicine-Public Health, Environmental and Occupational Health
CiteScore
3.90
自引率
10.30%
发文量
353
审稿时长
11 weeks
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