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Table 2 Phylogenetic groups of ESBL-producing E. coli isolates

From: Molecular epidemiology of extended-spectrum beta-lactamase-producing Escherichia coli in Tunisia and characterization of their virulence factors and plasmid addiction systems

Phylogenetic group Total CTX-M producers No CTX-M producers CTX-M-15 producers
Total number 163 (%) 118 45 101
    A 54 (33.1) 34 20 26
    B1 24 (14.7) 12 12 10
    B2 61 (37.4) 55 † 6 52 √
    D 24 (14.7) 17 7 13
  1. †: p < 0.0005 for CTX-M B2 producers vs no CTX-M B2 producers.
  2. √: p < 0.0005 for CTX-M-15 B2 producers vs no CTX-M-15 B2 producers.