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Research article - Peer-reviewed, 2022

Zoonotic Flavivirus Exposure in Peri-Urban and Suburban Pig-Keeping in Hanoi, Vietnam, and the Knowledge and Preventive Practices of Pig Farmers

Long Pham-Thanh; Thang Nguyen-Tien; Magnusson, Ulf; Vuong Nghia Bui; Anh Ngoc Bui; Lundkvist, Ake; Duoc Trong Vu; Son Hai Tran; Minh Xuan Can; Hung Nguyen-Viet; Lindahl, Johanna F.

Abstract

Mosquito-borne diseases (MBDs), including those caused by flaviviruses, remain human health problems for developing and urbanizing economies. This cross-sectional study examined risks of flavivirus exposure through a survey regarding knowledge and practices of pig farmers, and serological analysis of pigs in peri-urban and suburban Hanoi city. A total of 636 pig sera from 179 pig farms in 4 districts, namely, Chuong My, Dan Phuong, Ha Dong, and Bac Tu Liem, were analyzed by a competitive ELISA designed for flavivirus antibody detection. The results indicated a low level of awareness about MBDs among pig farmers, and a high seroprevalence in pigs at 88.5% (95%CI = 85.8-90.9%). Moreover, common practices of pig owners to prevent mosquitoes at home and farm did not show a significant reduction in flavivirus exposure in pigs. At animal level, significant associations between seropositive pigs and the farms with more than 60 pigs, and the district location were found. Farm-level multivariable analysis did not identify significant risk factors for flavivirus exposure. The study suggests that improving awareness of pig owners about MBDs in Hanoi city may be warranted to reduce the risk for MBD flavivirus infections in both humans and pigs.

Keywords

flaviviruses; knowledge and practices; pigs; serology; mosquitoes; risk factors; Hanoi

Published in

Tropical Medicine and Infectious Disease
2022, volume: 7, number: 5, article number: 79
Publisher: MDPI

Authors' information

Pham-Thanh, Long
International Livestock Research Institute (ILRI)
Pham-Thanh, Long
Uppsala University
Pham-Thanh, Long
Minist Agr and Rural Dev
Nguyen-Tien, Thang
International Livestock Research Institute (ILRI)
Nguyen-Tien, Thang
Uppsala University
Swedish University of Agricultural Sciences, Department of Clinical Sciences
Bui, Vuong Nghia
National Institute of Veterinary Research
Bui-Ngoc, Anh
National Institute of Veterinary Research
Lundkvist, Ake
Uppsala University
Vu, Duoc Trong
National Institute Of Hygiene And Epidemiology
Tran, Son Hai
National Institute Of Hygiene And Epidemiology
Xuan Can, Minh
Hanoi Sub Dept Livestock Prod and Anim Hlth
Nguyen-Viet, Hung
International Livestock Research Institute (ILRI)
Lindahl, Johanna Frida (Lindahl, Johanna Frida)
International Livestock Research Institute (ILRI)
Lindahl, Johanna F. (Lindahl, Johanna)
Uppsala University
Swedish University of Agricultural Sciences, Department of Clinical Sciences

UKÄ Subject classification

Pathobiology
Infectious Medicine

Publication Identifiers

DOI: https://doi.org/10.3390/tropicalmed7050079

URI (permanent link to this page)

https://res.slu.se/id/publ/117423