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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).