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Table 1 Composition of avian H7 HA sequence dataset (background NA subtypes N1, N2, N3 and N7)

From: Evolutionary interactions between haemagglutinin and neuraminidase in avian influenza

  Subtype
All subtypes (253) H7N1 (62) H7N2 (75) H7N3 (69) H7N7 (47)
Host order     
Ans. (38) Ans. (6) Ans. (6) Ans. (13) Ans. (13)
Gal. (173) Gal. (39) Gal. (60) Gal. (52) Gal. (22)
Pathogenicity     
HP (56) HP (20) HP (0) HP (20) HP (16)
LP (195) LP (42) LP (75) LP (49) LP (29)
Time-span (years) 1934-2001 1978-2006 1963-2006 1927-2003
Location     
Europe (118) Europe (53) Europe (5) Europe (25) Europe (35)
Asia (14) Asia (4) Asia (4) Asia (3) Asia (3)
Africa (4) Africa (3) Africa (0) Africa (0) Africa (1)
Australia (10) Australia (0) Australia (0) Australia (4) Australia (6)
N. America (99) N. America (2) N. America (66) N. America (29) N. America (2)
S. America (8) S. America (0) S. America (0) S. America (8) S. America (0)
  1. Numbers of H7 sequences associated with different NA subtypes, avian hosts, viral pathogenicities and years and locations of sampling are given in brackets. Note that it was not possible to determine such information for all sequences. For different avian host taxonomic orders, we use the abbreviations Ans. = Anseriformes, and Gal. = Galliformes.