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A simple procedure to demonstrate antimicrobial activity in cell-free supernatants

Zunjarrao, D.; Reshamwala, S. M. S.

2026-06-23 microbiology
10.64898/2026.06.22.733903 bioRxiv
Show abstract

Probiotics produce antimicrobial peptides and small molecules that are secreted into the medium. Antimicrobial activity of cell-free supernatants can be tested using various qualitative and quantitative methods. Many of these techniques employ methods which introduce uncontrolled variables, impacting reproducibility and making comparison of reported results difficult. Here, we present a simple procedure for quantitative estimation of antimicrobial activity of cell-free supernatants which overcomes drawbacks of commonly used methods.

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