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

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

Virotype	Virulence factors encoding genes
Virotype	afa/draBC	afa operon	iroN	sat	ibeA	papGII	cnfI	hlyA	papGIII	cdtB	neuC-K1
A	+	+	–	±	–	–	–	–	–	–	–
B	–	–	+	±	–	–	–	–	–	–	–
C	–	–	–	+	–	–	–	–	–	–	–
D	±	±	±	±	+	–	±	±	±	±	±
E	–	–	–	+	–	+	+	+	–	–	–
F^a	–	–	+	–	–	+	+	–	–	–	–
G^a	–	–	–	+	–	+	–	–	–	–	–

^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

ISSN: 1476-0711