IntroductionStreptococcus mutans has been implicated as primary microorganisms which cause dental caries in humans. There has been an increased interest in the therapeutic properties of some medicinal plants and natural compounds which have demonstrated antibacterial activities. Grape is one of the plants of this group which contains tannin and polyphenolic compound.AimTo evaluate and compare antibacterial activity of grape seed extract at different concentrations with chlorhexidine gluconate against S. mutans.Materials and methodsGrape seeds were extracted with ethanol/water ratio of 70:30 volume/volume. The extracts were filtered through Whatman No. 1 filter paper until it becomes colorless. Streptococcus mutans strains were taken. To check the antimicrobial properties of grape seed extract at different concentration and chlorhexidine gluconate, they were added to S. mutans strain and incubated for 48 hours than colony-forming units/mL were checked.ResultsGrape seed extract at higher concentration were found to be more potent against S. mutans. Chlorhexidine gluconate was found to have most potent antibacterial action compared to all different concentrations of grape seed extract.ConclusionGrape seed extract as a natural antimicrobial compound has inhibitory effect against S. mutans.How to cite this articleSwadas M, Dave B, Vyas SM, Shah N. Evaluation and Comparison of the Antibacterial Activity against Streptococcus mutans of Grape Seed Extract at Different Concentrations with Chlorhexidine Gluconate: An in vitro Study. Int J Clin Pediatr Dent 2016;9(3):181-185.