Abstract
In this study, bacterial isolates form Bat guano of a lime stone cave capable of producing antibiotics are reported. Screening of bacterial strains was carried out from top, middle, and bottom layer of the guano sample. Out of 20 isolated strains, three showed antimicrobial activity against all tested ATTC strain of common bacterial (both gram positive and gram negative) and fungal species. 16s RNA gene sequencing of the strain showing maximum activity revealed the isolated strain as Bacillus subtilis. Optimum production of antimicrobial compounds took place in TSB medium after 72 h of incubation at 30 °C. FTIR of crude extract showed chemical similarity with bacitracin. GCMS analysis of the crude extract revealed a range of antimicrobial and anticancer compounds. It is concluded that Bacillus subtilis strain isolated from Bat Guano is a potential source of novel antimicrobial compounds of broad-spectrum nature and have inhibitory effects against potential pathogens.
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