Prevalence and antimicrobial susceptibility of enterotoxigenic extra-intestinal Bacteroides fragilis among 13-year collection of isolates in Kuwait

Table 4 Antimicrobial susceptibility for 421 B. fragilis isolates

Antimicrobial agent (breakpoint in μg/ml)	Range	MIC₅₀	MIC₉₀	% of resistance
Amoxicillin-clavulanic acid (4)	0.125 - > 256	2	> 256	32
Clindamycin (2)	< 0.016 - > 256	> 256	> 256	62
Imipenem (4)	0.023 - > 32	0.25	6	11
Meropenem (4)	0.023 - > 32	0.5	> 32	17
Metronidazole (8)	0.023 - > 256	1	2	4
Piperacillin (16)	0.19 - > 256	> 256	> 256	61
Cefoxitin (16)	0.032 - > 256	8	> 256	26
Tigecycline (4)	0.094–32	1	8	14

ISSN: 1471-2180