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Surveillance of swine influenza viruses in sentinel familial farms in Hung Yen province in Northern Vietnam in 2013-2014

Baudon Eugénie, Peyre Marie-Isabelle, Tung Dao Duy, Thi Nga Pham, Khong Nguyen Viet, Cowling Benjamin John, Peiris Malik. 2020. Surveillance of swine influenza viruses in sentinel familial farms in Hung Yen province in Northern Vietnam in 2013-2014. Zoonoses and Public Health, 67 (3) : 213-221.

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Quartile : Q1, Sujet : VETERINARY SCIENCES / Quartile : Q3, Sujet : INFECTIOUS DISEASES

Résumé : 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.

Mots-clés Agrovoc : surveillance épidémiologique, influenzavirus porcin, exploitation agricole familiale, transmission des maladies

Mots-clés géographiques Agrovoc : Viet Nam

Mots-clés libres : Familial farm, Maternal antibody, Surveillance, Swine influenza, Value chain, Vietnam

Classification Agris : L73 - Maladies des animaux

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Auteurs et affiliations

  • Baudon Eugénie, University of Hong Kong (CHN) - auteur correspondant
  • Peyre Marie-Isabelle, CIRAD-BIOS-UMR ASTRE (FRA) ORCID: 0000-0002-0887-3418
  • Tung Dao Duy, National Institute of Veterinary Research (VNM)
  • Thi Nga Pham, National Institute of Veterinary Research (VNM)
  • Khong Nguyen Viet, National Institute of Veterinary Research (VNM)
  • Cowling Benjamin John, University of Hong Kong (CHN)
  • Peiris Malik, University of Hong Kong (CHN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/598902/)

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