Increased malaria transmission around irrigation schemes in Ethiopia and the potential of canal water management for malaria vector control.
Increased malaria transmission around irrigation schemes in Ethiopia and the potential of canal water management for malaria vector control.
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DOI：
10.1186/1475-2875-13-360
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发表时间：
2014-09-13
期刊：
影响因子：
3
通讯作者：
Petros B
中科院分区：
文献类型：
--
作者：
Kibret S;Wilson GG;Tekie H;Petros B
灌溉计划被认为是撒哈拉以南非洲许多地区疟疾增加的原因。然而，适当的水管理可以帮助缓解该地区灌溉计划周围的疟疾。这项研究调查了埃塞俄比亚中部灌溉和疟疾之间的联系。2009年11月至2010年10月，每两周从埃塞俄比亚中部Ziway地区的两个灌溉和两个非灌溉（对照）村庄采集幼虫和成蚊。在研究期间，每天记录运河放水量，每两周进行相关分析，以确定运河放水量与幼虫/成虫媒介密度之间的关系。采用酶联免疫吸附试验（ELISA）检测血源（牛与人）和疟疾孢子虫感染。每月还从研究村的中央保健中心收集疟疾数据。每月疟疾发病率在灌溉村比非灌溉村高6倍以上。灌溉村按蚊孳生地数量是非灌溉村的3.6倍，最常见的孳生地为农田涝坑、灌溉渠渗漏池和功能不完善的灌溉渠。研究期间，灌溉村按蚊幼虫和成蚊密度分别比非灌溉村高7倍和9倍。阿拉伯按蚊为研究区优势种。恶性疟原虫孢子率。灌溉村的阿拉伯按蚊和法罗按蚊数量显著高于非灌溉村。灌溉村和非灌溉村的年昆虫学接种率（EIR）分别为34.8和0.25口/人/年。两周按蚊幼虫密度与河道放水量呈显著正相关。同样，两周的病媒密度与滞后两周的运河放水量之间存在很强的正相关关系。此外，在灌溉村，每月疟疾发病率与每月病媒密度密切相关，后者滞后一个月。本研究表明，由于运河水管理不善，灌溉方案导致疟疾传播加剧。适当的渠水管理可以减少病媒数量和疟疾在灌溉村的传播。
Irrigation schemes have been blamed for the increase in malaria in many parts of sub-Saharan Africa. However, proper water management could help mitigate malaria around irrigation schemes in this region. This study investigates the link between irrigation and malaria in Central Ethiopia. Larval and adult mosquitoes were collected fortnightly between November 2009 and October 2010 from two irrigated and two non-irrigated (control) villages in the Ziway area, Central Ethiopia. Daily canal water releases were recorded during the study period and bi-weekly correlation analysis was done to determine relationships between canal water releases and larval/adult vector densities. Blood meal sources (bovine vs human) and malaria sporozoite infection were tested using enzyme-linked immunosorbent assay (ELISA). Monthly malaria data were also collected from central health centre of the study villages. Monthly malaria incidence was over six-fold higher in the irrigated villages than the non-irrigated villages. The number of anopheline breeding habitats was 3.6 times higher in the irrigated villages than the non-irrigated villages and the most common Anopheles mosquito breeding habitats were waterlogged field puddles, leakage pools from irrigation canals and poorly functioning irrigation canals. Larval and adult anopheline densities were seven- and nine-fold higher in the irrigated villages than in the non-irrigated villages, respectively, during the study period. Anopheles arabiensis was the predominant species in the study area. Plasmodium falciparum sporozoite rates of An. arabiensis and Anopheles pharoensis were significantly higher in the irrigated villages than the non-irrigated villages. The annual entomological inoculation rate (EIR) calculated for the irrigated and non-irrigated villages were 34.8 and 0.25 P. falciparum infective bites per person per year, respectively. A strong positive correlation was found between bi-weekly anopheline larval density and canal water releases. Similarly, there was a strong positive correlation between bi-weekly vector density and canal water releases lagged by two weeks. Furthermore, monthly malaria incidence was strongly correlated with monthly vector density lagged by a month in the irrigated villages. The present study revealed that the irrigation schemes resulted in intensified malaria transmission due to poor canal water management. Proper canal water management could reduce vector abundance and malaria transmission in the irrigated villages.
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影响因子：
3.3
作者：
Kibret, Solomon;Lautze, Jonathan;McCartney, Matthew
通讯作者：
McCartney, Matthew
影响因子：
2.7
作者：
Mutero, CM;Kabutha, C;Oganda, M
通讯作者：
Oganda, M
影响因子：
--
作者：
Ghebreyesus, TA;Haile, M;Byass, P
通讯作者：
Byass, P
DOI：
10.4269/ajtmh.2005.72.725
发表时间：
2005-06-01
影响因子：
3.3
作者：
Diuk-Wasser, MA;Toure, MB;Taylor, CE
通讯作者：
Taylor, CE
影响因子：
2.1
作者：
BEIER, JC;PERKINS, PV;KOECH, DK
通讯作者：
KOECH, DK