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Table 4 Summaries of the sequence variability and Simpson’s index of the three CPV-2 antigenic variants

From: Molecular epidemiology of canine parvovirus type 2 in Italy from 1994 to 2017: recurrence of the CPV-2b variant

  No. of sequences Total no. of sites S η π s a a/η k D
CPV-2a 56 1745 53 55 0.00251 SD 0.00019 42 13 0.23636 4.384 0.02403
CPV-2b 18 1745 16 16 0.00227 SD 0.00061 11 5 0.3125 3.961 0.37255
CPV-2c 49 1745 26 26 0.00132 SD 0.00013 23 3 0.11538 2.301 0.08078
Tot. 123 1745 81 83 0.00329 SD 0.00012 63 20 0.24096 5.747 0.02519
  1. a: total number of non-synonymous differences. a/η: total number of non-synonymous differences on the total number of mutations. CPV-2: canine parvovirus type 2. D: Simpson’s index. k: average number of nucleotide differences. η: total number of mutations. π: nucleotide diversity (average number of nucleotide differences per site) and standard deviation. s: total number of synonymous differences. S: number of polymorphic (segregating) sites