TABLE 3

Antimicrobial resistance scores and range toward 6 non-β-lactam antibiotics among 6 groups of strains defined by the possible combination of ESBL and CTX-M-15 production, ESBL production and fluoroquinolone resistance, and CTX-M-15 production and fluoroquinolone resistance, including those for MBL-positive and MBL-negative strains

SubgroupSubset definitionAll isolatesST131 isolatesNon-ST131 isolatesFecal isolates
No. of isolatesMedian (range) scoreNo. of isolatesMedian (range) scoreNo. of isolatesMedian (range) scoreNo. of isolatesMedian (range) score
1ESBL positive, CTX-M-15 positive724 (1–6)355 (2–6)214 (2–6)164 (2–5)
2ESBL positive, CTX-M-15 negative414 (1–6)154 (3–6)23 (3)245 (1–6)
3ESBL negative, fluoroquinolone resistant104 (3–6)43 (3–4)54 (4–6)10 (5)
4ESBL negative, fluoroquinolone susceptible71 (0–3)20 (0)22 (1–3)31 (0–3)
5CTX-M-15 positive, fluoroquinolone susceptible694 (2–6)385 (2–6)204 (2–6)114 (2–5)
6CTX-M-15 positive, fluoroquinolone susceptible73 (0–4)33 (0–3)10 (3)33 (3–4)
7MBL positive255 (2–6)125 (2–6)134 (2–6)00
8MBL negative584 (0–6)314 (0–6)274 (1–6)00