Vector capacity of Anopheles sinensis in malaria outbreak areas of central China.
Vector capacity of Anopheles sinensis in malaria outbreak areas of central China.
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DOI：
10.1186/1756-3305-5-136
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发表时间：
2012-07-09
影响因子：
3.2
通讯作者：
Jiang JJ
中科院分区：
文献类型：
--
作者：
Pan JY;Zhou SS;Zheng X;Huang F;Wang DQ;Shen YZ;Su YP;Zhou GC;Liu F;Jiang JJ
恶性疟和间日疟在我国历史上都曾流行，发病率高。2000年以后，除南部边境地区外，全国年发病率已降至0.0001%。尽管如此，2005-2007年期间，中国中部地区疟疾的重新出现或爆发是不可避免的。为了解媒介在疟疾暴发期间传播中的作用，对安徽省安徽对黄淮流域的中华绒螯蟹进行了调查。研究地点为安徽省怀远县和河南省永城县。在每个县，记录了近年来的疟疾病例，并通过访问研究地点的每个家庭记录了每个研究村的传播风险因素，包括防蚊设施和牲畜总数。在2个村庄采集蚊类标本，经鉴定后记录各研究点的种群密度和种类，并采用环沉淀试验检测吸血蚊。最后，计算各种指标来估计媒介容量或动态，包括蚊虫叮咬率（MBR）、人类血液指数（HBI）和经产率（M）。最后，媒介容量作为疟疾传播的一个重要指标，预测疟疾的潜在复发，估计和比较在每个研究点。怀远县80户居民中有93.0%和永城市192户居民中有89.3%有防蚊设施。没有发现牛或猪，每个研究村只发现不到10只羊。共采集按蚊94株和107株。在两个研究地点分别捕获蚊子，所有的安。sinensis进行了形态学鉴定。结果表明，蚊虫吸血高峰在晚上9：00 ~ 12：00。安的人咬人率。用半夜诱蚊法和全捕法估算的中华按蚊平均日人血指数（HBI）分别为0.6667（6/9）和0.6429（18/28）;人咬习性分别为0.2667和0.2572。因此，对按蚊的感染寿命和媒介容量的期望值也不高。在发生疟疾暴发的华中黄淮流域，中华按蚊的平均日发病率分别为0.3649-0.4761和0.5502-0.7740，明显高于以往无疟疾暴发年份。本研究表明，间日疟在黄淮流域的暴发流行与媒介按蚊能力的增强密切相关。中华按蚊对间日疟原虫的感染率较低，这是由于当地居民的生活习惯和大牲畜数量的显著减少导致传统的生物屏障消失。
Both falciparum and vivax malaria were historically prevalent in China with high incidence. With the control efforts, the annual incidence in the whole country has reduced to 0.0001% except in some areas in the southern borders after 2000. Despite this, the re-emergence or outbreak of malaria was unavoidable in central China during 2005–2007. In order to understand the role of the vector in the transmission of malaria during the outbreak period, the vector capacity of An. sinensis in Huanghuai valley of central China was investigated. The study was undertaken in two sites, namely Huaiyuan county of Anhui province and Yongcheng county of Henan province. In each county, malaria cases were recorded for recent years, and transmission risk factors for each study village including anti-mosquito facilities and total number of livestock were recorded by visiting each household in the study sites. The specimens of mosquitoes were collected in two villages, and population density and species in each study site were recorded after the identification of different species, and the blood-fed mosquitoes were tested by ring precipitation test. Finally, various indicators were calculated to estimate vector capacity or dynamics, including mosquito biting rate (MBR), human blood index (HBI), and the parous rates (M). Finally, the vector capacity, as an important indicator of malaria transmission to predict the potential recurrence of malaria, was estimated and compared in each study site. About 93.0% of 80 households in Huaiyuan and 89.3% of 192 households in Yongcheng had anti-mosquito facilities. No cattle or pigs were found, only less than 10 sheep were found in each study village. A total of 94 and 107 Anopheles spp. mosquitos were captured in two study sites, respectively, and all of An. sinensis were morphologically identified. It was found that mosquito blood-feeding peak was between 9:00 pm and 12:00 pm. Man biting rate of An. sinensis was 6.0957 and 5.8621 (mosquitoes/people/night) estimated by using half-night human bait trap method and full-capture method, respectively. Human blood indexes (HBI) were 0.6667 (6/9) and 0.6429 (18/28), and man-biting habits were 0.2667 and 0.2572 in two sites, respectively. Therefore, the expectation of infective life and vector capacity of An. sinensis was 0.3649-0.4761 and 0.5502-0.7740, respectively, in Huanhuai valley of central China where the outbreak occurred, which is much higher than that in the previous years without malaria outbreak. This study suggests that vivax malaria outbreak in Huanhuai valley is highly related to the enhancement in vector capacity of An. sinensis for P. vivax, which is attributed to the local residents’ habits and the remarkable drop in the number of large livestock leading to disappearance of traditional biological barriers.
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影响因子：
3.2
作者：
Liu XB;Liu QY;Guo YH;Jiang JY;Ren DS;Zhou GC;Zheng CJ;Zhang Y;Liu JL;Li ZF;Chen Y;Li HS;Morton LC;Li HZ;Li Q;Gu WD
通讯作者：
Gu WD
DOI：
10.1098/rspb.2008.0689
发表时间：
2009-01-07
影响因子：
4.7
作者：
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通讯作者：
Godfray, H. C. J.
影响因子：
1.9
作者：
Habtewold, T;Prior, A;Gibson, G
通讯作者：
Gibson, G
影响因子：
2.7
作者：
Cui, Liwang;Yan, Guiyun;Zhou, Guofa
通讯作者：
Zhou, Guofa
DOI：
10.4269/ajtmh.2011.11-0156
发表时间：
2011-09-01
影响因子：
3.3
作者：
Huang, Fang;Zhou, Shuisen;Li, Weidong
通讯作者：
Li, Weidong