TABLE 2.

Characteristics of MLST clonal complex ST131 members (n = 96) compared to those of non-ST131 (n = 113) ESBL-producing E. coli strains

CharacteristicNo. of isolates/total (%)P value
Clonal complex ST131Non-ST131
Antimicrobial susceptibilities (n = 209):
    GEN nonsusceptible64/96 (67)40/113 (35)0.0001
    TOB nonsusceptible89/96 (93)55/113 (49)<0.0001
    AMK nonsusceptible43/96 (45)39/113 (35)0.2
    TZP nonsusceptible33/96 (34)23/113 (20)0.03
    NIT nonsusceptible4/96 (4)13/113 (12)0.07
PMQR determinants (n = 209):
    aac(6′)-Ib-cr66/96 (69)46/113 (41)0.0001
    aac(6′)-Ib-cr and qnrB1/96 (1)0/113
Collection sites (n = 209):
    Community55/96 (57)75/113 (66)0.2
    Hospital29/96 (30)34/113 (30)1.0
    Nursing home12/96 (13)4/113 (4)0.02
Specimens (n = 209):
    Urine70/96 (73)94/113 (83)0.4
    Blood20/96 (21)11/113 (10)0.03
    Other6/96 (6)8/113 (7)1