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Table 1 Characteristics E. coli CTXR ST131 O25:H4/H30-Rx strains.

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

Strain

β-lactamic Resistance profile

Non-β-lactamic Resistance profile

Genetic resistance determinant

Phylogenetic group

ST/ST complex

AIEC genesa

Virulence genesa

C7223

AMP, AMC, CTX, CAZ

NA, CIP, S, T, TE, SXT

blaCTX-M15, blaOXA-1, aac(6′)-Ib-cr, tet(A)

B2

4225/131

insA, insB, intI1

fimH, iha, iucD, satA, papA, papGII

C7225

AMP, AMC, CTX, CAZ, FEP

NA, CIP, GM, AK, T, TE,

blaCTX-M15, blaOXA-1, aac(6′)-Ib-cr, tet(A), aac(3′)-II

B2

131/131

insA, insB, intI1

fimH, iha, iucD, satA, papA, papGII

C7226

AMP, AMC, CTX, CAZ, FEP

NA, CIP, GM, AK, T, TE

blaCTX-M15, blaOXA-1, aac(6′)-Ib-cr, aac(3′)-II

B2

131/131

insA, insB, intI1

fimH, iha, iucD, cnfI, iroN, papA, papGII

C7230

AMP, CTX, CAZ, FEP, IMP

NA, CIP, S, GM, T, TE

blaCTX-M15, tet(A),

B2

131/131

insA, insB, intI1

fimH, iha, iucD, cnfI, iroN, papA, papGII

  1. CTXR Resistant to cefotaxime, O25:H4/H30-Rx serotype/fimH variant-resistance to fluoroquinolones simultaneously with ESBL CTX-M-15 production, AMP ampicillin, AMC amoxicillin/clavulanic acid, CTX cefotaxime, CAZ ceftazidime, FEP cefepime, IMP imipenem, NA nalidixic acid, CIP ciprofloxacin, AK amikacin, GM gentamicin, T tobramicin, TE tetracycline, SXT sulfamethoxazole trimetoprim, S streptomycin
  2. aThis study