Table 4

Proportional contribution of ST131 to resistance by antimicrobial agent and source group

Antimicrobial agentNo. of ST131-resistant isolates/total no. of isolates (%) by isolate source
FecalCystitisPyelonephritis
Ampicillin4/59 (7)42/135 (31)89/160 (56)
Amoxicillin-clavulanate4/33 (12)42/90 (47)89/102 (87)
Cephalothin1/33 (3)23/129 (18)54/157 (34)
Trimethoprim-sulfamethoxazole2/17 (12)22/64 (34)52/87 (60)
Nitrofurantoin0/3 (0)4/10 (40)9/9 (100)
Gentamicin1/3 (33)9/19 (47)13/21 (62)
Amikacin0/3 (0)3/6 (50)5/6 (83)
Norfloxacin1/10 (10)15/40 (38)37/42 (88)
Ciprofloxacin0/3 (0)15/41 (37)36/41 (88)
Imipenem1/13 (7)1/2 (50)1/2 (50)
Nalidixic acid4/76 (5)24/68 (35)58/72 (81)
Tetracycline0/3 (0)37/193 (19)84/196 (43)
Ceftriaxone0/3 (0)4/13 (31)11/18 (61)
Ceftazidime0/3 (0)1/3 (33)3/12 (25)
All drug-bacterium combinations17/265 (6.4)247/826 (29.9)554/943 (58.7)