EFFECT OF SOME ANTIBIOTICS AND MEDICINAL PLANTS ON BACTERIA ISOLATED FROM DENTAL CALCULUI

Abstract

Fifty three samples of dental calculi were collected and speculated for bacteria colonizing them. Only twenty two calculi were harbouring bacteria. Streptocccus mutans was isolated from 18 samples while Staphylococcus aureus from 4 calculi. Most of used antibiotics were effective against both bacterial species. The antimicrobial activity of aqueous and oil extracts of clove (Eugenia caryophyllus), nigella (Nigella sativa), chamaemplum (Anthemis mobils), and lemon grass (Cymbopahon schoenanthus) were tested. It was found that S.aureus was more efficient than Streptococcus mutans in resisting the oil and aqueous extracts of medicinal plants used in study. Oil extract of lemon grass was the most efficient extract in the inhibition of growth of both isol