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2006

All Graduate Theses and Dissertations

Antibiotic resistance

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Antimicrobial Properties Of Syringopeptin 25a And Rhamnolipids, Prerak T. Desai May 2006

Antimicrobial Properties Of Syringopeptin 25a And Rhamnolipids, Prerak T. Desai

All Graduate Theses and Dissertations

The increasing bacterial resistance to available antibiotics requires the search for new antibacterial compounds to be broadened. This study investigated the antimicrobial properties of two secondary metabolites from fluorescent pseudo monads -- syringopeptin 25A, a lipodepsipeptide produced by Pseudomonas syringae pv. syringae, and a rhamnolipid mixture produced by Pseudomonas aeruginosa. The rate of antimicrobial action was determined by monitoring the rate of uptake of propidium iodide during exposure to the compounds. Inhibition was also confirmed by the microbroth dilution method to determine the MI Cs. Both the compounds inhibited growth of Gram-positive organisms, including Mycobacterium smegmatis, staphylococci, and listeria. Inhibition of ...