Quantitative determination of the antibacterial activity of licorice (Glycyrrhiza glabra) and tetracycline gel against (Aa), (Pg) and (Pi) - a microbiological study.

Objectives: The aim of this study was to evaluate and compare the antibacterial efficacy of licorice gel and tetracycline gel against , and .

Methods: An indigenously prepared 50 μL licorice and tetracycline gel was subjected to antibacterial sensitivity test (thrice) against Aa, Pg, Pi by agar well diffusion method using Brain Heart Infusion media. Colonies of Aa, Pg, Pi was transferred into broth and incubated at 37 °C for 24 h and diameter of inhibition zone was measured.