Prevalence and mechanisms of ciprofloxacin resistance in Escherichia coli isolated from hospitalized patients, healthy carriers, and wastewaters in Iran

Table 5 Effect of PaβN (phenylalanine-arginine beta-naphthylamide) on MICs of ciprofloxacin in selected ciprofloxacin-resistant E. coli isolates

	Molecular characteristics of the isolates				MIC (µg/mL) without PAβN	MIC (µg/mL) with PAβN
	Gene pattern	Mutations
	Gene pattern	par C	gyr B	gyr A
1	oqxA/B	-	-	+	32	16
2	oqxA/B	-	-	-	128	64
3	oqxA/B	-	-	-	128	64
4	oqxA/B	-	-	-	64	32
5	oqxA/B	-	-	-	16	8
6	no oqxA/B	-	-	+	8	8
7	no oqxA/B	-	-	-	256	256

ISSN: 1471-2180