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Table 8 Contingency table between Phylogroup and number of virulence factors. Chi-square test; p-value = 0.0325

From: Comparative genomics of European avian pathogenic E. Coli (APEC)

  Number of virulence factors
   1 4 5 6 7 8 9 10 11 12
  A 1 0 0 1 3 1 2 1 0 0
Phylogroup A1 0 1 1 4 2 6 8 3 0 0
  B1 0 2 2 1 1 2 0 0 0 1
  B2 0 2 0 6 8 5 15 3 3 0
  D 0 0 1 0 4 2 2 0 1 0