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Introduction: Essential herbs such as garlic, ginger, and cardamom have shown antimicrobial activity with no potential adverse effects and are cost-effective. Despite these advantages, the efficacy of these agents needs to be tested against common oral pathogenic microorganisms to ensure that if found effective, they can be used in clinical settings. Aim: To evaluate and compare the effectiveness of garlic, ginger, and cardamom oils on Streptococcus mutans (S. mutans) against chlorhexidine. Materials and Methods: An in-vitro study was conducted at Bharati Vidyapeeth Dental College and Hospital, Navi Mumbai, in the Department of Microbiology and Bharati Vidyapeeth College of Pharmacy, Navi Mumbai, Maharashtra, India from January 2023 to September 2023. Oil extracts of garlic, ginger, and cardamom were loaded onto sterile filter paper discs measuring 6 mm in diameter in concentrations of 50 µL, 100 µL, and 200 µL. Additionally, 2% chlorhexidine (control group) was loaded onto similar sterile paper discs. The discs were dried and placed aseptically on culture media plates inoculated with S. mutans, and the plates were then incubated at 37°C overnight. Subsequently, the zones of inhibition were measured in millimeters. Results: Ginger oil exhibited the highest zone of inhibition, measuring 25 mm, followed by cardamom oil and garlic oil measuring 18 mm and 12 mm, respectively, at a concentration of 200 µL. The zone of inhibition measured for 100 µL concentrations of garlic, ginger, and cardamom oils were 7 mm, 16 mm, and 13 mm, respectively. For 50 µL concentrations of the oils, the zones of inhibition for garlic, ginger, and cardamom were 0 mm, 13 mm, and 9 mm, respectively. The zone of inhibition shown by chlorhexidine was 22 mm for concentrations of 50 µL, 100 µL, and 200 µL. Conclusion: Essential oil extracts from ginger, cardamom, and garlic were found to have antimicrobial activity against S. mutans, with ginger oil showing the highest effectiveness, followed by cardamom oil and garlic oil. [ABSTRACT FROM AUTHOR]

Poor oral health has broad consequences that can be seen at personal as well as societal levels, especially in developing countries like India. We have limited information on the healthy oral cavity's inhabitant microorganisms that play a crucial role in overall oral health. In a comprehensive culture-independent approach, the bacterial composition of healthy human oral cavities was determined from a sub-population of northern India. During this study, 20 mouthwash-derived metagenomes were explored for identifying bacterial diversity using the 16S rRNA hypervariable V3 region with the MiSeq Illumina platform. On the taxonomy assignment of operational taxonomic units (OTUs), 20 assigned phyla and 162 genera were recovered among the participants. The mean relative abundance revealed that Streptococcus was the dominant genera among the participants. However, at inter-individual analysis, Neisseria and Haemophilus exhibited first-order dominance among five and three healthy individuals, respectively. Correlation studies indicate that Streptococcus shares a strong relationship with Rothia, Corynebacterium, Prevotella, and Veillonella, whereas it was negatively correlated with Neisseria, Aggregatibacter, Porphyromonas, and Fusobacteria like Gram-negative bacteria. Bacterial diversity showed insignificant differences at the level of age and gender within and between the participants. The results support several of the major findings of previous reports on the healthy oral microbiome of the Indian population, however, the present investigation further illustrates that demographic region leaves an impact on overall bacterial composition. The study will assist in a better understanding of the oral microbiome from region-specific Indian population that was otherwise highly under-represented. [ABSTRACT FROM AUTHOR]