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Monitoring of malaria vectors at the ChinaMyanmar border while approaching malaria elimination

Artykuł
Czasopismo : Parasites & Vectors   Tom: 11, Zeszyt: 511, Strony: 1-12
Shao-sen Zhang [1] , [2] , [3] , [4] , [5] , [6] , [7] , Shui-sen Zhou [1] , [2] , [3] , [4] , Zheng-bin Zhou [1] , [2] , [3] , [4] , Tian-mu Chen [1] , [2] , [3] , [4] , Xue-zhong Wang [8] , Wen-qi Shi [1] , [2] , [3] , [4] , Wei-kang Jiang [1] , [2] , [3] , [4] , Ju-lin Li [9] , Xiao-nong Zhou [1] , [2] , [3] , [4] , Roger Frutos [5] , [6] , Sylvie Manguin [7] , Aneta Afelt [10]
  • [1]
    National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
  • [2]
    Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China
  • [3]
    National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China
  • [4]
    WHO Collaborating Center for Tropical Diseases, Shanghai 200025, China
  • [5]
    IES, Université Montpellier, CNRS, 34059 Montpellier Cedex 5, France
  • [6]
    Cirad, UMR 17, Intertryp, Campus international de Baillarguet, 34398 Montpellier Cedex 5, France
  • [7]
    HydroSciences Montpellier (HSM), Institut de Recherche pour le Développement (IRD), CNRS, Université Montpellier, 34093 Montpellier, France
  • [8]
    Yunnan Institute of Parasitic Diseases, Pu’er Yunnan 665000, China
  • [9]
    Jiangsu Institute of Parasitic Diseases, Wuxi 214064, Jiangsu Province, China
  • [10]
2018-08-15 angielski
Identyfikatory
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Cechy publikacji
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  • Oryginalny artykuł naukowy
  • Zrecenzowana naukowo
Dyscypliny naukowe
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Biologia , Ekologia , Geografia , Kształtowanie środowiska , Nauki o zdrowiu
Słowa kluczowe
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Abstrakty ( angielski )
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Background: Tengchong County was one of the counties located at the China-Myanmar border with high malaria incidence in the previous decades. As the pilot county for malaria elimination at the border area, Tengchong County is aiming to be the first county to achieve malaria elimination goal. A cross-sectional entomological survey was carried out to evaluate the feasibility of elimination approach and assess the receptivity of malaria reintroduction. Methods: Light traps associated with live baits were used to investigate the abundance of adult mosquitoes in nine villages in Tengchong County. Light traps were set to collect adult mosquitoes in both human houses and cowsheds from dusk till dawn in each site. Results: A total of 4948 adult Anopheles mosquitoes were collected from May to December in two villages. Of the mosquitoes were captured, 24.2% were in human houses and 75.8% in cowsheds. The peak of abundance occurred in July for An. sinensis and in September-October for An. minimus (s.l.) Ten Anopheles species were collected, the most prevalent being An. sinensis (50.3%), An. peditaeniatus (31.6%) and An. minimus (s.l.) (15.8%), contributing to 97.6% of the sample. Potential breeding sites were also investigated and a total of 407 larvae were collected, with An. sinensis (50.1%) and An. minimus (s.l.) (46.2%) as predominant species. Ponds and rice fields were the two preferred breeding sites for Anopheles mosquitoes; however, the difference between the number of adults and larvae captured suggest other breeding sites might exist. Both An. sinensis and An. minimus (s.l.) were found zoophilic with human blood index as 0.21 and 0.26, respectively. No Plasmodium positive Anopheles specimens were found by PCR among 4,000 trapped mosquitoes. Conclusions: Although no indigenous malaria cases have been reported in Tengchong County since 2013, there is still a risk from the presence of vectors in the context of human population movements from neighboring malaria endemic areas. The presence of An. sinensis, associated to rice fields, is particularly worrying. Sustained entomological surveillance is strongly suggested even after malaria elimination certification.
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