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KMID : 1007520030120030307
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Food Science and Biotechnology
2003 Volume.12 No. 3 p.307 ~ p.311
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A Pathogenic Bacteria, Corynebacterium ulcerans CU, is More Sensitive to Growth Inhibition by Glycine and Isonicontic Acid Hydrazide than Amino Acid-producing Corynebacterium glutamicum Strains
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Jang, Ki-Hyo
Lee, Jae-Cheol/Britz, Margaret L.
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Abstract
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The effects of glycine (0-10%, w/v), isonicontic acid hydrazide (INH) (0-1%, w/v) and tween 80 (0-0.9%, w/v) on the growth of Corynebacterium glutamicum, Corynebacterium ulcerans, and Escherichia coli were evaluated. A pathogenic bacterium, C. ulcerans, was more sensitive to the inhibition by glycine than saprophytic corynebacteria, C. glutamicum AS019. C. glutamicum AS019 was the most resistant strain to the growth inhibition by glycine and INH. As a group, the corynebacteria were relatively more resistant to INH than mycobacteria. Release of proteins from Escherichia coli during sonication was faster than that from C. glutamicum. The present study indicates that the cell wall structure in corynebacterial strains is different, and thus different sensitivity of cells to cell wall modifiers may be used as an indicator for identification of pathogenic corynebacteria in foods.
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