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Table 4 Percentage of resisting isolates to nalidixic acid, ofloxacin, and ciprofloxacin, among strains which have harbored just one type of qnr genes and/or qnr S and B

From: Frequency of quinolone resistance genes among extended-spectrum β-lactamase (ESBL)-producing Escherichia coli strains isolated from urinary tract infections

Antibiotics

qnr B

qnr A

qnr S

qnr S-B

21 (no)

10 (no)

41 (no)

21 (no)

Nalidixic acid (%)

33.33

60.00

73.17

100

Ofloxacin (%)

28.57

50.00

70.73*

95.23

Ciprofloxacin (%)

28.57

50.00

68.29*

95.23

NA, OF, and CIP (%)

28.57

50.00

65.85

95.23

  1. Abbreviations: R resistant, no number
  2. *P value < 0.05