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Spatial distribution of Culex mosquito abundance and associated risk factors in Hanoi, Vietnam

Ha, Tuyen V. and Kim, Wonkook and Nguyen-Tien, Thang and Lindahl, Johanna and Nguyen-Viet, Hung and Thi, Nguyen Quang and Nguyen, Huy Van and Unger, Fred and Lee, Hu Suk (2021). Spatial distribution of Culex mosquito abundance and associated risk factors in Hanoi, Vietnam. PLoS Neglected Tropical Diseases. 15 , e0009497
[Research article]

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Abstract

Japanese encephalitis (JE) is the major cause of viral encephalitis (VE) in most AsianPacific countries. In Vietnam, there is no nationwide surveillance system for JE due to lack of medical facilities and diagnoses. Culex tritaeniorhynchus, Culex vishnui, and Culex quin-quefasciatus have been identified as the major JE vectors in Vietnam. The main objective of this study was to forecast a risk map of Culex mosquitoes in Hanoi, which is one of the most densely populated cities in Vietnam. A total of 10,775 female adult Culex mosquitoes were collected from 513 trapping locations. We collected temperature and precipitation information during the study period and its preceding month. In addition, the other predictor variables (e.g., normalized difference vegetation index [NDVI], land use/land cover and human population density), were collected for our analysis. The final model selected for estimating the Culex mosquito abundance included centered rainfall, quadratic term rainfall, rice cover ratio, forest cover ratio, and human population density variables. The estimated spatial distribution of Culex mosquito abundance ranged from 0 to more than 200 mosquitoes per 900m2. Our model estimated that 87% of the Hanoi area had an abundance of mosquitoes from 0 to 50, whereas approximately 1.2% of the area showed more than 150 mosquitoes, which was mostly in the rural/peri-urban districts. Our findings provide better insight into understanding the spatial distribution of Culex mosquitoes and its associated environmental risk factors. Such information can assist local clinicians and public health policymakers to identify potential areas of risk for JE virus. Risk maps can be an efficient way of raising public awareness about the virus and further preventive measures need to be considered in order to prevent outbreaks and onwards transmission of JE virus.

Authors/Creators:Ha, Tuyen V. and Kim, Wonkook and Nguyen-Tien, Thang and Lindahl, Johanna and Nguyen-Viet, Hung and Thi, Nguyen Quang and Nguyen, Huy Van and Unger, Fred and Lee, Hu Suk
Title:Spatial distribution of Culex mosquito abundance and associated risk factors in Hanoi, Vietnam
Series Name/Journal:PLoS Neglected Tropical Diseases
Year of publishing :2021
Volume:15
Article number:e0009497
Number of Pages:13
Publisher:PUBLIC LIBRARY SCIENCE
ISSN:1935-2727
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 3 Medical and Health Sciences > 303 Health Sciences > Public Health, Global Health, Social Medicine and Epidemiology
URN:NBN:urn:nbn:se:slu:epsilon-p-113126
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113126
Additional ID:
Type of IDID
DOI10.1371/journal.pntd.0009497
Web of Science (WoS)000670711100009
ID Code:25487
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Clinical Sciences
Deposited By: SLUpub Connector
Deposited On:22 Sep 2021 23:25
Metadata Last Modified:23 Sep 2021 05:01

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