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Table 3 E. coli ST131 O25:H4/H30-Rx virotypes, according with the virulence genes content.

From: Adherent/invasive Escherichia coli (AIEC) isolates from asymptomatic people: new E. coli ST131 O25:H4/H30-Rx virotypes

Virotype Virulence factors encoding genes
afa/draBC afa operon iroN sat ibeA papGII cnfI hlyA papGIII cdtB neuC-K1
A + + ±
B + ±
C +
D ± ± ± ± + ± ± ± ± ±
E + + + +
Fa + + +
Ga + +
  1. anew proposed virotype; +, positive PCR result; −, negative PCR result. afa/draBC, Afa/Dr adhesins; afa operon, FM955459; iroN, catecholate siderophore receptor; sat, secreted autotransporter toxin; ibeA, invasion of brain endothelium; papGII, allele II of papG gene; cnf1, cytotoxic necrotizing factor type 1; hlyA, alpha-hemolysin; papGIII, allele III of papG gene; cdtB, cytolethal distending toxin; neuC-K1, K1 variant of group II capsule