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KMID : 0425120100480010035
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Parasites, Hosts and Diseases
2010 Volume.48 No. 1 p.35 ~ p.41
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Malaria Vector Surveillance in Ganghwa-do, a Malaria-Endemic Area in the Republic of Korea
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Oh Sung-Suck
Hur Myung-Je
Joo Gwang-Sig
Kim Sung-Tae
Go Jong-Myeong
Kim Yong-Hee
Lee Wook-Gyo
Shin E-Hyun
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Abstract
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We investigated the seasonality of Anopheles mosquitoes, including its species composition, density, parity, and population densities of mosquitoes infected with the parasite in Ganghwa-do (Island), a vivax malaria endemic area in the Republic of Korea. Mosquitoes were collected periodically with a dry-ice-tent trap and a blacklight trap during the mosquito season (April-October) in 2008. Anopheles sinensis (94.9%) was the most abundant species collected, followed by Anopheles belenrae (3.8%), Anopheles pullus (1.2%), and Anopheles lesteri (0.1%). Hibernating Anopheles mosquitoes were also collected from December 2007 to March 2008. An. pullus (72.1%) was the most frequently collected, followed by An. sinensis (18.4%) and An. belenrae (9.5%). The composition of Anopheles species differed between the mosquito season and hibernation seasons. The parous rate fluctuated from 0% to 92.9%, and the highest rate was recorded on 10 September 2008. Sporozoite infections were detected by PCR in the head and thorax of female Anopheles mosquitoes. The annual sporozoite rate of mosquitoes was 0.11% (2 of 1,845 mosquitoes). The 2 mosquitoes that tested positive for sporozoites were An. sinensis. Malarial infections in anopheline mosquitoes from a population pool were also tried irrespective of the mosquito species. Nine of 2,331 pools of Anopheles mosquitoes were positive. From our study, it can be concluded that An. sinensis, which was the predominant vector species and confirmed as sporozoite-infected, plays an important role in malaria transmission in Ganghwa-do.
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KEYWORD
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Anopheles mosquito, Plasmodium vivax, sporozoite rate, parous rate, PCR, Ganghwa-do
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