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Volume 29, Number 7—July 2023
Dispatch

Surveillance and Genomic Characterization of Influenza A and D Viruses in Swine, Belgium and the Netherlands, 2019–2021

Anna Parys, Nick Vereecke, Elien Vandoorn, Sebastiaan Theuns, and Kristien Van ReethComments to Author 
Author affiliations: Ghent University, Merelbeke, Belgium (A. Parys, E. Vandoorn, K. Van Reeth); Ghent University and PathoSense BV, Lier, Belgium (N. Vereecke, S. Theuns)

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Table 2

Swine influenza A virus genotypes of 23 viruses isolated from pigs in Belgium and the Netherlands, November 2019–December 2021*

Subtype Genotype Surface genes
 Internal genes
 Total
HA NA PB2 PB1 PA NP M NS
H1N1 M H1av N1av av av av av p av 4
A H1av N1av av av av av av av 3
AB H1av N1av av av av p av av 1
AC H1av N1av av av av av p p 1
S pH1 N1av p p p p p p 2
H
 H1hu
 N1av
av
 av
 av
 av
 av
 av
 1
H1N2 AR H1av N2g av av av av p av 1
R pH1 N2g p p p p p p 6
C H1hu N2s av av av av av av 1
AI H1hu N2g av av av av p av 1
AQ
 H1hu
 N2s
av
 av
 av
 av
 p
 av
 1
H3N2 N H3g N2g av av av av p av 1

*Nomenclature as described by Watson et al. (7). av, European avian-like; g, A/swine/Gent/1/1984-like; HA, hemagglutinin; hu, European human-like; M, matrix; NA, neuraminidase; NP, nucleoprotein; NS, nonstructural protein; p, 2009 pandemic; PA, polymerase; PB, polymerase basic; s, A/swine/Scotland/410440/1994-like.

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