Table 4.
Antibiotics | Disc Potency (µg) | B-2 | B-5 | B-11 | B-14 | B-19 | B-21 | B-28 | B-33 |
---|---|---|---|---|---|---|---|---|---|
Ampicillin | 10 | S | S | S | S | S | S | S | S |
Cephalothin | 15 | S | S | S | S | S | S | S | S |
Chloramphenicol | 50 | S | S | S | S | S | S | S | S |
Cloxacillin | 20 | S | S | S | S | S | S | S | S |
Erythromycin | 10 | S | S | S | S | S | S | S | S |
Fusidic acid | 10 | R | R | R | R | R | R | R | R |
Gentamicin | 10 | R | R | R | R | R | R | R | R |
Kanamycin | 30 | R | R | R | R | R | R | R | R |
Nalidixic acid | 20 | R | R | R | R | R | R | R | R |
Neomycin | 20 | R | R | R | S | R | R | R | R |
Novobiocin | 30 | S | S | S | S | S | S | S | S |
Penicillin | 10 | S | S | S | S | S | S | S | S |
Polymyxin B | 20 | R | R | R | R | R | R | R | R |
Rifampicin | 20 | R | R | R | R | R | S | R | R |
Spectinomycin | 10 | S | S | S | S | S | S | S | S |
Streptomycin | 25 | R | R | R | R | R | S | R | R |
Tetracycline | 30 | S | S | S | S | S | S | S | S |
Vancomycin | 30 | S | S | S | S | S | S | S | S |
Where, inhibition zone diameter <8 mm, resistant (R); inhibition zone diameter between 8–10 mm, moderate (M) and inhibition zone diameter >10 mm, susceptibility (S).