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<p>The inhibitory action of Sulphaphenazole on pure culture of Klebsiella aerogenes was studied with emphasis on the mode of action of the drug. Sensitivity was studied by broth dilution method and by Hi-Comb Method. The Minimum Inhibitory Concentration (MIC) of Sulphaphenazole determined by broth dilution method and Hi-Comb Method against Klebsiella aerogenes was 30 ?g/ml. Sulphaphenazole induced changes in bacteria which interfered with cell wall synthesis revealing morphological alterations that was shown by Scanning Electron Microscopy (SEM). The present studies were undertaken to investigate the presence and characteristic alterations in surface morphology of cells resulting from the action of Sulphaphenazole known to interfere with intracellular protein synthesis. The morphological abnormalities observed may be surface reflections of specific abnormalities of intracellular protein synthesis or may represent a final common pathway of drug-induced injury at many sites within or on bacterial cells. As the activity of dehydrogenases was inhibited by Sulphaphenazole, cells were incapable of oxidizing substrate. It resulted in limited supply of energy rich compounds such as ATP that affected the synthesis of macromolecules. Ultimately multiplication and growth of the organism got ceased.</p

Effect of Sulphaphenazole on Pathogenic Microorganism Klebsiella aerogenes