Table 2.

Avian influenza virus HA-NA subtype combinations isolated from wild aquatic birds in North America, 2014–2015

HA-NANA 123456789
HA 1H1N1H1N2H1N3H1N5H1N6H1N8H1N9
2H2N2H2N3H2N4H2N5H2N6H2N8H2N9
3H3N1H3N2H3N3H3N4H3N5H3N6H3N8H3N9
4H4N1H4N2H4N3H4N4H4N5H4N6H4N8H4N9
LP 5*H5N2H5N9
6H6N1H6N2H6N4H6N5H6N6H6N8H6N9
LP 7*H7N1H7N3H7N4H7N5H7N7H7N9
8H8N4
9H9N1
10H10N2H10N3H10N7H10N8H10N9
11H11N1H11N2H11N3H11N6H11N8H11N9
12H12N1H12N4H12N5
13H13N3H13N6
14H14N7
16H16N3H16N6
  • Viruses comprising HA subtypes H1–H14 and H16 and NA subtypes N1–N9 were identified. (Locations of surveillance sites and species sampled are described in Materials and Methods.) All subtype H5 viruses were determined to be low pathogenic using viral nucleotide sequencing performed by the National Veterinary Services Laboratories, US Department of Agriculture.

  • * Low pathogenic.