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Table 1 Percent of sequence similarity between the reference strain and field isolates

From: Impact of antigenic and genetic drift on the serologic surveillance of H5N2 avian influenza viruses

Year of isolation

Percentage of sequence identity

1994 (n = 29)

97.7 ± 2.1a

1995 (n = 16)

97.5 ± 1.4a

1996 (n = 4)

96.5 ± 0.5ab

1997 (n = 8)

96.0 ± 0.5b

1998 (n = 11)

94.5 ± 0.5b

2002 (n = 8)

92.7 ± 0.4c

2005 (n = 5)

90.8 ± 0.4d

2006 (n = 6)

90.1 ± 0.4d

2007 (n = 9)

91.1 ± 3.3c

2008 (n = 3)

91.0 ± 0.0c

  1. Percent of sequence similarity between the reference strain (A/Ck/México/1994) and low pathogenic Avian Influenza H5N2 viruses isolated between 1994 and 2008. Mean values ± SD. Statistical comparisons were made using ANOVA and Fisher's protected least significant difference test. Values with different superscript are significantly different (P ≤ 0.05).