Table 3 Minimum Inhibitory Concentrations against Gram-Negative bacteria measured under aerobic conditions, µg/mL.

From: In vitro Antimicrobial Activity of Acne Drugs Against Skin-Associated Bacteria

Anti-acne

agent

Bacteria

antibiotics

non-antibiotics

Colistin

Tetracycline

Erythromycin

Oxacillin

Clindamycin

Dapsone

Salicylic acid

Azelaic acid

Benzoyl peroxide 75%

E. coli

ATCC 25922

1–2

>32

2

1

>4100

16000

16000

2048

A. johnsonii

ATCC 17909

64

>32–16

0.5

0.06

0.015–0.03

256

2000

8000–16000

2048

  1.  [n = 4, duplicate results from 2 independent assays.]