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J Gen Virol. 2015 Jan 15. pii: vir.0.000049. doi: 10.1099/vir.0.000049. [Epub ahead of print]
Phylogenetically distinct equine influenza viruses show different tropism for the swine respiratory tract.
Patrono LV1, Bonfante F2, Zanardello C2, Terregino C2, Capua I2, Murcia PR3.
Author information
Abstract
Influenza A viruses circulate in a wide range of animals. H3N8 equine influenza virus (EIV) is an avian-origin virus that has established in dogs as canine influenza virus (CIV) and has also been isolated from camels and pigs. Previous work suggests that adaptive mutations acquired during EIV evolution might have played a role in CIV emergence. Given the potential role of pigs as a source of human infections, we determined the ability of H3N8 EIVs to replicate in pig cell lines and in respiratory explants. We show that evolutionary distinct EIVs display different infection phenotypes along the pig respiratory tract, but not in cell lines. Our results suggest that EIV displays a dynamic host range along its evolutionary history, supporting the view that evolutionary processes play important roles on host range and tropism, and also underscore the utility of using explants cultures to study influenza pathogenesis.
PMID: 25593159 [PubMed - as supplied by publisher]
Phylogenetically distinct equine influenza viruses show different tropism for the swine respiratory tract.
Patrono LV1, Bonfante F2, Zanardello C2, Terregino C2, Capua I2, Murcia PR3.
Author information
Abstract
Influenza A viruses circulate in a wide range of animals. H3N8 equine influenza virus (EIV) is an avian-origin virus that has established in dogs as canine influenza virus (CIV) and has also been isolated from camels and pigs. Previous work suggests that adaptive mutations acquired during EIV evolution might have played a role in CIV emergence. Given the potential role of pigs as a source of human infections, we determined the ability of H3N8 EIVs to replicate in pig cell lines and in respiratory explants. We show that evolutionary distinct EIVs display different infection phenotypes along the pig respiratory tract, but not in cell lines. Our results suggest that EIV displays a dynamic host range along its evolutionary history, supporting the view that evolutionary processes play important roles on host range and tropism, and also underscore the utility of using explants cultures to study influenza pathogenesis.
PMID: 25593159 [PubMed - as supplied by publisher]
