Newest information just received from the WVMA
Canine Influenza Virus Update from WVDL
This message is intended to update WVMA Veterinarians concerning canine influenza virus (CIV). Hotspots of CIV remain to be the metropolitan Chicago area with reported confirmed positive dogs in Indiana, Iowa, and Wisconsin. The single canine case in Madison was first identified as influenza A positive by a broadly reactive matrix real-time RT-PCR assay developed at WVDL. Collaboration with Cornell University scientists indicated distinctive traits in the strain, which prompted the WVDL to type the strain with as N2. This strain is different from the circulating H3N8 strain and explains the more robust clinical disease reported in dogs in the Chicago area.
The canine H3N2 virus was sequenced at the National Veterinary Service Laboratory (NVSL) in Ames, IA, which revealed the H3N2 virus to be almost genetically identical to Asian strains with no evidence of genetic re-assortment. This new canine strain is distinctly different from human seasonal and swine influenza A (H3N2) strains. Also important to note is that the Asian H3N2 strain has been reported to infect domestic cats. A few cats have been tested at WVDL but none have tested positive.
As of Tuesday, April 28, 2015, WVDL reports that all positive samples tested thus far are type N2. The majority of positive samples are from the Chicago area. To be clear: the WVDL is aware of only one CIV positive dog in Wisconsin thus far. However, CIV is not a reportable disease, so we may not have all testing information available to report to WVMA veterinarians.
Recommendations for dog owners remain the same.