Swine influenza in Norway: a distinct lineage of influenza A(H1N1)pdm09 virus.

ABSTRACT:

Background

Since the influenza A(H1N1)pdm09 virus was first introduced to the Norwegian pig population in September 2009, it has repeatedly been detected in pigs in Norway. No other subtypes of influenza virus are circulating in Norwegian pigs.

Objective

To follow the diversity of A(H1N1)pdm09 viruses circulating in pigs in Norway and to investigate the relationship between viruses circulating in Norwegian pigs and in humans.

Methods

Between January 2011 and January 2013, nasal swabs from 507 pigs were tested for A(H1N1)pdm09 virus by real-time RT-PCR. The hemagglutinin (HA) gene of virus-positive samples was sequenced and compared with publically available sequences from viruses circulating in humans at the time.

Results

Sequencing and phylogenetic analysis of

SUBMITTER: Forberg H 

PROVIDER: S-EPMC5655891 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature