Antibiotic class
|
Specific antibiotic tested
|
Concentration
|
Interpretive categories and zone diameter breakpoints (nearest whole mm)a
|
No. of isolates/Total isolates
|
---|
Rb
|
I
|
S
|
R
|
I
|
S
|
---|
Macrolides
|
Azithromycin
|
15 μg
|
≤ 12
|
–
|
≥ 13
|
22/34
|
–
|
12/34
|
Cephalosporins
|
Ceftriaxone
|
30 μg
|
≤ 19
|
20–22
|
≥ 23
|
9/34
|
0/34
|
25/34
|
Cephalexin
|
30 μg
|
≤ 14
|
–
|
≥ 15
|
33/34
|
–
|
1/34
|
Penicillins
|
Penicillin
|
10 IU
|
≤ 14
|
–
|
≥ 15
|
33/34
|
–
|
1/34
|
Amoxicillin
|
25 μg
|
≤ 13
|
14–16
|
≥ 17
|
30/34
|
0/34
|
4/34
|
Aminoglycosides
|
Gentamicin
|
10 μg
|
≤ 12
|
13–14
|
≥ 15
|
2/34
|
0/34
|
32/34
|
Tetracyclines
|
Tetracycline
|
30 μg
|
≤ 11
|
12–14
|
≥ 15
|
26/34
|
1/34
|
7/34
|
Phenicols
|
Chloramphenicol
|
30 μg
|
≤ 12
|
13–17
|
≥ 18
|
13/34
|
5/34
|
16/34
|
- aFrom CLSI [32]
- b R resistant, I intermediate, S susceptible