Epidemiological Features of Clostridium difficile Colonizing the Intestine of Jordanian Infants

Table 3

Antimicrobial MIC results of 37 C. difficile isolates.

Antimicrobial agents	MIC50 (µg/ml)	MIC90 (µg/ml)	Resistance breakpoint (µg/ml)	MIC (µg/ml) range	Number (%) of resistance
	5.3	9.6	8	3.0–16.0	29 (78.4)
Erythromycin	0.42	0.75	8	0.25–2.0	11 (29.7)
Vancomycin	0.89	1.60	32	1.0–4.0	Null
Metronidazole	0.09	0.16	32	0.023–0.25	Null

total of 40.5% of isolates were positive for both mutated GyrA and GyrB genes.