Gene

Codon

# of isolates with mutation^*

Phenotypic susceptibility to FQ

S

R

I

gyrA

83

5

-

-

5

87

1

-

1

-

83 + 87

3

-

3

-

parC

57

1

-

1

-

gyrA & parC

83 + 87 & 80

2

-

2

-

gyrA & parC

83 & 57

1

-

1