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KMID : 0364820150510040444
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Korean Journal of Microbiology
2015 Volume.51 No. 4 p.444 ~ p.447
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Inhibitory effect of SeO2 on cell growth of methicillin-resistant Staphylococcus aureus
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Han Yeong-Hwan
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Abstract
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This study was carried out to determine the antibacterial activity of SeO₂ against pathogenic bacteria, methicillin-resistant Staphylococcus aureus (MRSA). Using the disc diffusion method, SeO₂ showed higher antibacterial activity against Gram-positive bacteria than Gram-negative bacteria used in this study. Coccus-form bacteria showed much susceptible to SeO₂, compared to bacillus-form bacteria. Compared to antibiotics-susceptible S. aureus, antibiotics used in this study showed lower antibacterial activity against MRSA. As 200-500 μg/disc of SeO₂ was applied, diameters of clear zone for S. aureus and MRSA were 20-32.7 mm and 13.5-17.9 mm, respectively. For MRSA, minimal inhibitory concentration of SeO₂ was 40 μg/ml. When SeO₂ was added in culture broth, cell growth of MRSA was inhibited. These results will be applied to determine antibacterial mechanism of MRSA and other pathogenic microorganisms.
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KEYWORD
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Staphylococcus aureus, inhibitory effect, methicillin resistant, MIC, SeO2
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