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Impact of Climate Variability and Abundance of Mosquitoes on Dengue Transmission in Central Vietnam

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  • Luong Thi Nguyen

    (International Master/PhD Program in Medicine, College of Medicine, Taipei Medical University, 110 Taipei, Taiwan
    Department of Tropical Diseases, Baichay Hospital, 57000 Quang Ninh, Vietnam)

  • Huy Xuan Le

    (Nha Trang Pasteur Institute, 01000 Khanh Hoa, Vietnam)

  • Dong Thanh Nguyen

    (Department of Vector Control and Border Quarantine, Nha Trang Pasteur Institute, 01000 Khanh Hoa, Vietnam)

  • Ha Quang Ho

    (Department of Vector Control and Border Quarantine, Nha Trang Pasteur Institute, 01000 Khanh Hoa, Vietnam)

  • Ting-Wu Chuang

    (International Master/PhD Program in Medicine, College of Medicine, Taipei Medical University, 110 Taipei, Taiwan
    Department of Molecular Parasitology and Tropical Diseases, School of Medicine, College of Medicine, Taipei Medical University, 110 Taipei, Taiwan)

Abstract

Dengue fever is an important arboviral disease in many countries. Its incidence has increased during the last decade in central Vietnam. Most dengue studies in Vietnam focused on the northern area (Hanoi) and southern regions but not on central Vietnam. Dengue transmission dynamics and relevant environmental risk factors in central Vietnam are not understood. This study aimed to evaluate spatiotemporal patterns of dengue fever in central Vietnam and effects of climatic factors and abundance of mosquitoes on its transmission. Dengue and mosquito surveillance data were obtained from the Department of Vector Control and Border Quarantine at Nha Trang Pasteur Institute. Geographic Information System and satellite remote sensing techniques were used to perform spatiotemporal analyses and to develop climate models using generalized additive models. During 2005–2018, 230,458 dengue cases were reported in central Vietnam. Da Nang and Khanh Hoa were two major hotspots in the study area. The final models indicated the important role of Indian Ocean Dipole, multivariate El Niño-Southern Oscillation index, and vector index in dengue transmission in both regions. Regional climatic variables and mosquito population may drive dengue transmission in central Vietnam. These findings provide important information for developing an early dengue warning system in central Vietnam.

Suggested Citation

  • Luong Thi Nguyen & Huy Xuan Le & Dong Thanh Nguyen & Ha Quang Ho & Ting-Wu Chuang, 2020. "Impact of Climate Variability and Abundance of Mosquitoes on Dengue Transmission in Central Vietnam," IJERPH, MDPI, vol. 17(7), pages 1-16, April.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:7:p:2453-:d:341189
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