Healthy Pigs in Quebec Found to Harbour Rotavirus A21 February 2014
CANADA - Healthy pigs on 10 farms in Quebec were found to be infected with rotavirus A at each sampling time. They had different genotypes of the virus from those in other countries and tools and equipment were consistently contaminated.
Group A rotaviruses (RVA) in pigs have been poorly investigated in Canada, according to Virginie Lachapelle of the University of Montreal and co-authors in the journal, Archives of Virology.
In a continued effort to fill this gap, they sampled 10 finisher swine farms in Quebec over a nine-month period.
The presence of RVA was detected in healthy pigs on all farms investigated during the entire sampling period.
The genotypes detected included G2, G5, G9 and G11; P, P, P, P and P; and I5 and I14. The predominant types were G2, P and I5, which are different from previous global reports.
Various fomites were consistently contaminated by RVA, suggesting that a resident viral flora remains in the farm environment and may play a role in the infection of incoming pigs, according to Lachapelle and co-authors.
They add that their results also suggest temporal or geographical specificities regarding strain distribution on pig farms.
Lachapelle V., J.S. Sohal, M.C. Lambert, J. Brassard, P. Fravalo, A. Letellier and Y. L'homme. 2014. Genetic diversity of group A rotavirus in swine in Canada. Arch Virol. 2014 Jan 9. Epub ahead of print.
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