Antibiotic class
|
Antibiotics
|
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
|
< 17
|
17–21
|
≥ 22
|
24/36
|
7/36
|
5/36
|
Cephalosporins
|
Ceftriaxone
|
30 μg
|
< 15
|
15–20
|
≥ 21
|
9/36
|
5/36
|
22/36
|
Cephalexin
|
30 μg
|
< 12
|
12–17
|
≥ 18
|
34/36
|
2/36
|
0/36
|
Penicillins
|
Penicillin
|
10 IU
|
< 8
|
8–28
|
≥ 29
|
36/36
|
0/36
|
0/36
|
Amoxicillin
|
25 μg
|
< 14
|
14–24
|
≥ 25
|
36/36
|
0/36
|
0/36
|
Aminoglycosides
|
Gentamicin
|
10 μg
|
< 18
|
18–20
|
≥ 21
|
9/36
|
27/36
|
0/36
|
Tetracyclines
|
Tetracycline
|
30 μg
|
< 22
|
22–24
|
≥ 25
|
31/36
|
5/36
|
0/36
|
Phenicols
|
Chloramphenicol
|
30 μg
|
< 18
|
18–20
|
≥ 21
|
24/36
|
11/36
|
1/36
|
- a From CLSI [33], Hansen et al. [34], CA-SFM [35]and Soussy et al. [36]
- b R resistant, I intermediate, S susceptible