Effect of NaOH, catalase, various proteolytic enzymes and diaion treatment on the inhibitory activity of CFS produced by L. paraplantarum against S. aureus. The results are expressed as mean ± SD of three replicate experiments. a HPLC showing chromatogram for mix standard solution of organic acids 1 lactic acid, 2 acetic acid, 3 propionic acid, 4 butyric acid b showing the elution time for organic acids (1 lactic acid, 2 acetic acid) present in the test sample of CFS produced by L. paraplantarum