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Detection of African swine fever virus in free-ranging wild boar in Southeast Asia

Denstedt, Emily and Porco, Alice and Hwang, Jusun and Nga, Nguyen Thi Thanh and Ngoc, Pham Thi Bich and Chea, Sokha and Khammavong, Kongsy and Milavong, Phonesavanh and Sours, Sreyem and Osbjer, Kristina and Tum, Sothyra and Douangngeun, Bounlom and Theppanya, Watthana and Long, Nguyen Van and Thanh Phuong, Nguyen and Tin Vinh Quang, Le and Hung, Vo Van and Hoa, Nguyen Thi and Anh, Dao Le and Fine, Amanda and Pruvot, Mathieu (2021). Detection of African swine fever virus in free-ranging wild boar in Southeast Asia. Transboundary and Emerging Diseases. 68 , 2669-2675
[Research article]

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Abstract

African Swine Fever (ASF) is a highly contagious and fatal viral disease affecting both domestic and wild suids. The virus was introduced to Southeast Asia in early 2019 and has since spread rapidly throughout the region. Although significant efforts have been made to track and diagnose the disease in domestic pigs, very little is known about ASF in free-ranging wild boar and their potential role in maintaining the disease within Southeast Asia. Through a collaboration between government and non-government actors in Laos, Viet Nam, and Cambodia, investigations were conducted to (a) characterize the interface between domestic pigs and wild boar, (b) document risk factors for likely ASF spillover into wild boar populations by way of this interface, and (c) determine whether ASF in wild boar could be detected in each country. An extensive overlap between wild boar habitat and domestic pig ranging areas was found around villages bordering forests in all three countries, creating a high-risk interface for viral spillover between domestic pig and wild boar populations. Fifteen and three wild boar carcasses were detected through passive reporting in Laos and Viet Nam, respectively, in 2019 and early 2020. Four of five carcasses screened in Laos and two of three in Viet Nam were confirmed positive for African swine fever virus using real-time PCR. There were no confirmed reports of wild boar carcasses in Cambodia. This is the first confirmation of ASF in wild boar in Southeast Asia, the result of a probable viral spillover from domestic pigs, which highlights the importance of early reporting and monitoring of ASF in wild boar to enable the implementation of appropriate biosecurity measures.

Authors/Creators:Denstedt, Emily and Porco, Alice and Hwang, Jusun and Nga, Nguyen Thi Thanh and Ngoc, Pham Thi Bich and Chea, Sokha and Khammavong, Kongsy and Milavong, Phonesavanh and Sours, Sreyem and Osbjer, Kristina and Tum, Sothyra and Douangngeun, Bounlom and Theppanya, Watthana and Long, Nguyen Van and Thanh Phuong, Nguyen and Tin Vinh Quang, Le and Hung, Vo Van and Hoa, Nguyen Thi and Anh, Dao Le and Fine, Amanda and Pruvot, Mathieu
Title:Detection of African swine fever virus in free-ranging wild boar in Southeast Asia
Series Name/Journal:Transboundary and Emerging Diseases
Year of publishing :2021
Volume:68
Page range:2669-2675
Number of Pages:7
Publisher:WILEY
ISSN:1865-1674
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science > Pathobiology
Keywords:African swine fever, ASF, livestock-wildlife interface, outbreak, Southeast Asia, spillover, wild boar
URN:NBN:urn:nbn:se:slu:epsilon-p-110451
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110451
Additional ID:
Type of IDID
DOI10.1111/tbed.13964
Web of Science (WoS)000608066100001
ID Code:25317
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Clinical Sciences
Deposited By: SLUpub Connector
Deposited On:13 Sep 2021 12:25
Metadata Last Modified:13 Sep 2021 12:31

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