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Aim of this study was to isolate and characterize soil pigmented bacteria for their industrial and environmental use. In this investigation, soil pigmented bacteria were subjected to antibiotic susceptibility screening and heavy metal tolerance assays. As a result, it was noted that 85-95% pigmented isolates showed sensitivity to Gentamicin, Trimethoprim and Tetracycline; 40 and 35% isolates were resistant to Penicillin and Ampicillin, respectively. Heavy metal tolerance tests indicated that soil pigmented microflora pose effectual tolerance even at higher concentrations of heavy metals (3mM and 5mM). Strain S13 grew well in 5.0mM concentration of copper sulfate while S17 tolerated all concentrations (0.5mM to 5.0mM) of lead acetate. This strain flourished more as the molar amount of lead acetate increased (up to 5.0mM). Isolate S3 was capable to thrive under 5.0mM concentration of mercuric sulfate. These findings can be helpful to select those pigmented bacterial strains that are susceptible to antibiotics with the ability of heavy metal tolerance, thus they can be used for large scale production of pigments for food and pharmaceutical applications and detoxification of heavy metals in various ecological niches.
Ayisha Aman, Sidra Riaz, Ayesha Siddiqui, Suad Naheed. (2019) ASSESSMENT OF ANTIBIOTIC SUSCEPTIBILITY AND HEAVY METAL RESISTANCE OF PIGMENTED BACTERIA ISOLATED FROM SOIL, , Volume 16, Issue 4.
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