Prevalence of antibiotic resistant Escherichia coli isolates from fecal samples of food handlers in Qatar

Table 1 Minimum inhibitory concentration (MIC) range and interpretation for antibiotics used to test susceptibility of E. coli isolates (n = 78) from food handlers’ fecal samples

Antibiotic	Abbreviation	MIC range tested (μg/mL)	MIC Interpretive Standard (μg/mL)^a SIR
Penicillin & Penicillin β-lactamase inhibitor combinations
Ampicillin	AM	0.016–256	≤8	16	≥32
Amoxicillin/Clavulanic acid	XL	0.016–256	≤8/4	16/8	≥32/16
Aminoglycosides
Gentamicin	GM	0.016–256	≤4	8	≥16
Quinolone
Ciprofloxacin	CI	0.002–32	≤0.006	0.12–0.5	≥1
Chloramphenicol
Chloramphenicol	CL	0.016–256	≤8	16	≥32
Tetracycline
Tetracycline	TC	0.016–256	≤4	8	≥16
Folate pathway inhibitors
Trimethoprim	TR	0.002–32	≤8	–	≥16
Sulphamethoxazole	SX	0.064–1024	≤258		≥512
Cephalosporin
Ceftriaxone	TX	0.016–256	≤1	2	≥4

^a The MIC values interpretation into sensitive (S), intermediate (I), and resistant (R) was according to the Clinical & Laboratory Standards Institute (CLSI) guidelines

ISSN: 2047-2994