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Volume 18, Number 10—October 2012

Dispatch

Influenza A(H1N1)pdm09 Virus in Pigs, Réunion Island

Eric Cardinale1Comments to Author , Hervé Pascalis1, Sarah Temmam2, Séverine Hervé2, Aure Saulnier, Magali Turpin, Nicolas Barbier, Johny Hoarau, Stéphane Quéguiner, Stéphane Gorin, Coralie Foray, Matthieu Roger, Vincent Porphyre, Paul André, Thierry Thomas, Xavier de Lamballerie, Koussay Dellagi, and Gaëlle Simon
Author affiliations: Le Centre de Recherche et de Veille sur les Maladies Emergentes dans l’Océan Indien, Sainte-Clotilde, Ile de la Réunion, France (E. Cardinale, H. Pascalis, S. Temmam, M. Turpin, J. Hoarau, C. Foray, M. Roger, K. Dellagi); Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Montpellier, France (E. Cardinale, J. Hoarau, C. Foray, M. Roger, V. Porphyre); Institut de Recherche pour le Développement, Sainte-Clotilde (H. Pascalis, M. Turpin, K. Dellagi); Centre National de la Recherche Scientifique–Université de Lyon, Lyon, France (S. Temmam); Agence Nationale de Sécurité Sanitaire, de l’alimentation, de l’Environnement, et du Travail (ANSES), National Reference Laboratory for Swine Influenza, Ploufragan, France (S. Hervé, A. Saulnier, N. Barbier, S. Quéguiner, S. Gorin, G. Simon); Clinique Vétérinaire, Saint-Louis, Ile de la Réunion (P. André); Coopérative des Producteurs de Porcs de la Réunion, Saint-Pierre, Ile de la Réunion (T. Thomas); and Université de la Méditerranée, Marseille, France (X. de Lamballerie)

Main Article

Table 2

Seroprevalence rates for influenza A viruses among fattening pigs as determined by ELISA and HI testing, Reunion Island, 2010 and 2011*

Time of sampling campaign (total no. farms; total no. pigs) Antinucleoprotein ELISA
A(H1N1)pdm09 HI test
Herd, % Pigs, % Herd†, % Pigs, %
June 2010 (N = 45; n = 252) 13.33 5.55 8.89 3.57
March 2011 (N = 33; n = 256) 48.48 28.12 42.42 16.41
July–August 2011 (N = 38; n = 316) 47.37 34.49 39.47 27.21
October 2011 (N = 33; n = 259) 57.57 40.93 42.42 22.01

*Pigs were randomly sampled at the slaughterhouse during 4 campaigns. Seroprevalence rates are % farms positive at the herd level among all farms (N) and % pigs positive at the animal level among all animals (n). HI, hemagglutination inhibition.
†Within-herd prevalence of infected pigs ranged from 3% to 23%.

Main Article

1These authors contributed equally to this article.

2These authors contributed equally to this article.

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