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KMID : 0351619730140020327
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Kyungpook Medical Journal
1973 Volume.14 No. 2 p.327 ~ p.339
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Biological Characteristics of Sporotrichum Schenckii Isolated From Soil
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Abstract
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Sporotrichum schenckii widely distributed in nature is known to cause cutaneous or systemic sporotrichosis through wounds of man and animal. Since there are many reports insisting on differences between the saprophytes and pathogenes in their biological characteristics, the author attempted this study to compare the biological characteristics of S. schenckii isolated from soil and patients in Korea.
For The purpose of this study, 21 strains of saprophytes isolated from soil (12 white mycelial phase, 5 black mycelial phase and 4 yeast phase), 4 pathogenic and 3 control strains were used.
1. Conversion of yeast phase on brain heart infusion blood agar: The highest rate was shown in pathogenic strains followed by black and white mycelial phase strains in that order.
2. Sensitivity to potassium iodide: Pathogenic strains were sensitive but saprophytes were not affected.
3. Casein agar, ammonium nitrate agar and inositol agar : All strains showed poor growth on these media but each strain was well identified.
4. Media containing thiamine: All strains showed good growth and increase in coloring of the colony.
5. Sensitivity to gentian violet, phenylmercuric acetate and thymol: High sensitivity was shown in yeast phase, black mycelial phase and pathogenic strains. White mycelial phase strains, however, showed strong resistance.
Sensitivity to nystatin and trichomycin: High sensitivity was shown in yeast phase strains and slightly less in pathogenic and black mycelial phase strains, but white mycelial phase strains shewed strong resistance.
6. Growth attitude to temperature: Pathogenic and yeast phase strains did not grow at a temperature higher than 36℃ but white mycelial phase strains grew even at 38℃.
7. Resistance to heat: The strongest resistance was shown in white mycelial phase strains followed by yeast phase, black mycelial phase and pathogenic strains.
8. Sensitivity to ultraviolet light: Pathogenic and black mycelial phase strains were most sensitive and followed by yeast and white mycelial phase strains in that order.
9. Electron microscopic findings showed similarity in saprophytes (yeast and black mycelial phase strains) and pathogenic strains. Some difference was noted in white mycelial phase strains.
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