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首页> 外文期刊>The American Journal of Tropical Medicine and Hygiene >Malaria vectors in a traditional dry zone village in Sri Lanka.
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Malaria vectors in a traditional dry zone village in Sri Lanka.

机译：斯里兰卡传统干旱地区村庄中的疟疾媒介。

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Malaria transmission by anopheline mosquitoes was studied in a traditional tank-irrigation-based rice-producing village in the malaria-endemic low country dry zone of northcentral Sri Lanka during the period August 1994-February 1997. Adult mosquitoes were collected from human and bovid bait catches, bovid-baited trap huts, indoor catches, and pit traps. Mosquito head-thoraces were tested for the presence of Plasmodium falciparum and P. vivax, and blood-engorged abdomens for the presence of human blood by ELISAs. House surveys were done at two-day intervals to record cases of blood film-confirmed malaria among the villagers. A total of 7,823 female anophelines representing 14 species were collected. Trends in anopheline abundance were significantly correlated with rainfall of the preceding month in An. annularis, An. barbirostris, An. subpictus, An. vagus, and An. varuna, but were not significant in An. culicifacies and An. peditaeniatus. Malaria parasite infections were seen in seven mosquito species, with 75% of the positive mosquitoes containing P. falciparum and 25% P. vivax. Polymorph PV247 was recorded from a vector (i.e., An. varuna) for the first time in Sri Lanka. Computations of mean number of infective vector (MIV) rates using abundance, circumsporozoite (CS) protein rate, and human blood index (HBI) showed the highest rate in An. culicifacies. A malaria outbreak occurred from October 1994 to January 1995 in which 45.5% of village residents experienced at least a single disease episode. Thereafter, malaria incidence remained low. Anopheles culicifacies abundance lagged by one month correlated positively with monthly malaria incidence during the outbreak period, and although this species ranked fifth in terms of abundance, infection was associated with a high MIV rate due to a high CS protein rate and HBI. Abundance trends in other species did not correlate significantly with malaria. It was concluded that An. culicifacies was epidemiologically the most important vector in the study area.
机译：在1994年8月至1997年2月期间，在斯里兰卡中北部疟疾流行低地干旱地区的一个传统的以罐式灌溉为基础的水稻生产村中，研究了按蚊蚊传播的疟疾。捕获物，诱饵诱集的小屋，室内捕获物和陷阱。 ELISA法检测了蚊虫的额胸中是否存在恶性疟原虫和间日疟原虫，以及血液充盈的腹部中是否存在人血。每隔两天进行一次房屋调查，以记录村民中血膜确诊的疟疾病例。总共收集了7823个雌性按蚊，它们代表14种。 An的an鱼丰度趋势与前一个月的降雨显着相关。圆环羚巴比罗斯特里斯亚种，安。迷走神经和安。 varuna，但在An中不显着。古迹和安。 peditaeniatus。在七个蚊子中发现了疟原虫感染，其中75％的阳性蚊子中含有恶性疟原虫和间日疟原虫25％。在斯里兰卡首次从载体（即An。varuna）中记录了多晶型物PV247。使用丰度，环子孢子蛋白（CS）蛋白率和人类血液指数（HBI）计算传染媒介（MIV）的平均数显示出最高的发生率。古迹。 1994年10月至1995年1月，疟疾爆发，其中45.5％的村民至少经历了一次疾病发作。此后，疟疾发病率仍然很低。在暴发期间，库蚊按蚊的丰度滞后一个月与每月的疟疾发病率呈正相关，尽管该物种在丰度方面排名第五，但由于CS蛋白率和HBI高，感染与MIV率高相关。其他物种的丰度趋势与疟疾没有显着相关。得出结论。流行病学是研究领域中最重要的媒介。

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