Vol. 11, Issue 3 (2022)

Author(s):
Varsha Srivastava and Nidhi Vinod Singh

Abstract:
To determine the antimicrobial potential of guava (Psidium guajava) leaves, Stems and Fruits extracts against positive culture- Staphylococcus aureus and negative cultures- Pseudomonas aeruginosa and E. coli which are some of food borne and spoilage bacteria. The guava leaves, Stems and fruits were extracted in two different solvents methanol and ethanol. Compare to all parts, the stems were showing best result and the zone of inhibition was obtained 28.5 mm. The antibacterial activities of the extracts against bacteria were tested by using agar well diffusion assay and the MIC values were determined by broth dilution assay. The ethanolic extract showed least antibacterial activity as compared to methanolic extract. The least concentration was obtained 0.33 mg/ml in ethanolic extract of stems and 0.05 mg/ml in methanolic extract of stems against P. aeruginosa.