Antimicrobial Properties of Neem (Azadirachta Indica): A Comprehensive Review of Phytochemicals and Mechanisms of Action

Azadirachta indica, commonly known as neem, is a well-recognized medicinal plant which is utilized for its antimicrobial, antifungal, and antiviral actions. Neem is mainly used in the Asian continent (India, China, etc.). Neem's potent antibacterial, antifungal, and antiviral properties are due to its diverse array of phytochemicals, which include limonoids (azadirachtin, nimbin, nimbidin), flavonoids (quercetin, kaempferol), tannins, and triterpenoids. These compounds act by several mechanisms, including disrupting microbial cell membranes, inhibiting vital metabolic enzymes, preventing biofilm formation, and inducing oxidative stress in pathogens. Neem extracts have shown promising inhibition against several microbial strains, including Candida albicans, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa. The review concludes that neem is a promising candidate for developing safe, effective, and eco-friendly antimicrobial agents. However, further clinical studies, standardization, and regulatory validation are required. Future research should focus on targeted delivery systems, synergistic studies with conventional drugs, and its role in combating antimicrobial resistance (AMR). The main objective of this review is to study the botanical description, phytoconstituents and anti-microbial activity (anti-fungul, anti-viral, etc.) of neem.