[Source: US National Library of Medicine, full page: (LINK). Abstract, edited.]
Zoonoses Public Health. 2019 Dec 19. doi: 10.1111/zph.12671. [Epub ahead of print]
Surveillance of swine influenza viruses in sentinel familial farms in Hung Yen province in Northern Vietnam in 2013-2014.
Baudon E1,2, Peyre M2, Tung DD3, Thi Nga P3, Khong NV3, Cowling BJ1, Peiris M1.
Author information: 1 The University of Hong Kong, Hong Kong, China. 2 French Agricultural Research Center for International Development (CIRAD), Montpellier, France. 3 National Institute of Veterinary Research, Hanoi, Vietnam.
From May 2013 to April 2014, 15 swine family-run farms (17 pig litters) in two districts in Hung Yen province, near Hanoi, were virologically and epizootiologically monitored for swine influenza viruses (SIV) monthly. No SIV was isolated from nasal swabs. Maternal antibodies were detected in 10 litters, and seroconversion against SIV was detected in six litters. There was a marked difference in patterns of SIV transmission in the two districts. Van Lam district which has low density of swine with mainly smallholder farms had low intensity of SIV, with much of the infection caused by H1N1 2009 pandemic-like viruses A(H1N1)pdm09, likely originated from humans. In contrast, Van Giang district, which has high swine density and larger farms, had high levels of typical SIV (triple reassortants H3N2 and H3N2 Binh Duong lineage viruses) circulating within swine. With one exception, the SIV lineages detected were those we concurrently isolated from studies in a large central abattoir in Hanoi. Influenza-like illness symptoms reported by farmers were poorly correlated with serological evidence of SIV infection.
© 2019 Blackwell Verlag GmbH.
KEYWORDS: Vietnam; familial farm; maternal antibody; surveillance; swine influenza; value chain
PMID: 31855326 DOI: 10.1111/zph.12671
Keyword: Swine Influenza; Influenza A; H1N1pdm09; H3N2; Serology; Pigs; Vietnam.