Comparative Antibacterial activity of Azadirachta indica and Ocimum sanctum against Escherichia coli and Staphylococcus aureus

The present study demonstrated that Azadirachta indica (Neem) and Ocimum sanctum (Tulsi) possess significant antibacterial activity against the tested bacterial pathogens. Antimicrobial efficacy increased with extract concentration, as confirmed by the MIC analysis, indicating a clear dose-dependent inhibitory effect, with Neem showing slightly greater effectiveness in some cases. GLC analysis verified the presence of bioactive compounds, including azadirachtin in Neem and eugenol in Tulsi, which are known to contribute to their antimicrobial properties. Tulsi contains a complex phytochemical profile rich in biologically active constituents such as eugenol, ursolic acid, phenolic compounds, and tannins, while Neem is abundant in azadirachtin, nimbin, flavonoids, and other antimicrobial phytochemicals. The synergistic action of these compounds is likely responsible for the observed antibacterial effects. Overall, the findings highlight the potential of Neem and Tulsi as natural sources of antibacterial agents with promising applications in healthcare, pharmaceutical formulations, and food preservation. Further research aimed at isolating, characterizing, and evaluating the mechanisms of action of their active constituents may facilitate the development of effective plant-based antimicrobial therapies.

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