TABLE 2.
Independent introductions of avian virus B-allele NS segments into mammalian hosts
| Strain | Host | Transmission | Notes (reference) | GenBank accession no. (NS segment) | Avian source |
|---|---|---|---|---|---|
| A/equine/Jilin/1/1989 (H3N8) | Equine | Epidemic | Major equine influenza epidemic (25) | M65020 | Domestic |
| A/muskrat/Buryatiya/1944/2000 (H4N6) | Muskrat | Single isolate | Closely related to an H4N6 avian influenza virus circulating in Russia at a similar time point (70). | GU052363.1 | Wild |
| A/swine/KU/16/2001 (H7N2) | Swine | Likely single isolate | Isolated from 1 pig (of 532 tested) from a slaughterhouse; apparent reassortment between avian H7N2 and H5N3 viruses (71). | CY067690 | Domestic |
| A/swine/Saskatchewan/18789/02 (H1N1) | Swine | Likely transmissible in pigs | Isolated from a 1,200-sow pig farm where influenza-like symptoms affected pigs of all ages; fully avian virus (72) | AY619957 | Wild |
| A/New York/107/2003 (H7N2) | Human | Single isolate | Apparent individual infection of a 48-year-old immunocompromised man from the Caribbean with fever and flu-like symptoms; no apparent transmission to family (73) | EU587374.2 | Domestic |
| A/swine/Korea/C13/2008 (H5N2) | Swine | Apparent transmission | Serological evidence of transmission within pigs (maybe asymptomatic?) (74) | FJ461601.1 | Wild |