This study aimed to assess the antimicrobial activity of Allium sativum, Zingiber officinal, Mentha pamiroalaica, Curcuma longa aqueous extracts against gram-positive and gram-negative bacteria found in supragingival plaque of periodontitis patients. Thirty-five samples were collected from the supragingival plaques. Using disk diffusion and agar well diffusion methods, the antimicrobial activity of amoxicillin and aqueous extracts of Allium sativum, Zingiber officinal, Mentha pamiroalaica, Curcuma longa were examined. The antimicrobial activity of amoxicillin was compared to that of these plants. Seventeen bacterial isolates were obtained, 11 were G-negative (64.7%) and 6 were G-positive (35.3%). All bacterial isolates responded to Allium sativum, Zingiber officinale, Mentha pamiroalaica and Curcuma longa extracts, with inhibition zones (20 to 35 mm). In contrast, most bacterial isolates were resistant to amoxicillin, and some were responsive to amoxicillin. Allium sativum, Zingiber officinal, Mentha pamiroalaica and Curcuma longa extracts appeared to be effective in inhibiting various microorganisms and may raise the hope of being good alternatives to antibiotics.
Abood et al. (Mon,) studied this question.