One of the most prevalent and important health problems in the world is periodontal and plaque-related diseases that antibiotic drugs are used with their side effects as their treatment. With increasing resistance to antibiotics and a desire from the general public for "natural" therapies, there is a need to minimize antibiotic use and develop new treatments for oral diseases without antimicrobial agents. Probiotics are viable microorganisms which provide a health benefit to the host when administered in adequate amounts; studies show that probiotics have the potential to modify the oral microbiota and decrease the colony-forming unit (CFU) counts of the oral pathogens being investigated to prevent or treat oral disease, such as dental caries and the periodontal diseases. In addition, the identification of specific strains with probiotic activity is required for any oral infectious disease, in order to determine the exact dose, the time of treatment, and the ideal vehicle.
Background Studies have been conducted on citrus fruits and their essential oils in terms of preservative properties and the effect on food safety. Objective This study aimed to examine the antibacterial effects of kumquat peel essential oil. Methods In this experimental study, Kumquat fruit was purchased from the market in Qazvin, Iran. Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of kumquat peel essential oil against Staphylococcus aureus and Escherichia coli strains were measured using broth microdilution method (the range of essential oil concentrations was 25000-12500-6250-3125-1562.5-781.25-390.625-195.31-97.655-48.82 µg/ml), and the diameter of the bacteria growth inhibition zone was determined by diffusion method (the percentage of essential oil was (4×10 5 µg/ml) and then compared with standard 10 6-8×10 5-6×10 5-antibiotics. For statistical analysis, independent t-test and oneway ANOVA were used. Findings Their mean levels of MIC and MBC for the essential oil against the Staphylococcus aureus were 0.42±0.18 and 1.04±0.3, and against the Escherichia coli, they were 0.26±0.09 and 0.42±0.18, respectively. Under Disk diffusion, the highest mean diameter of growth inhibition zone for Staphylococcus aureus and Escherichia coli were obtained 12.1 and 10.17 mm, respectively. Conclusion The kumquat peel essential oil has a significant antimicrobial effect on the study bacteria. As an herbal product, it can be useful as an alternative to synthetic drugs and food additives.
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