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題 名 | Toxigenicity and Susceptibility to UV Light and Chlorine for Aeromonas Hydrophila from Various Sources=不同來源之水生產氣單胞菌之毒性及其對殘氯和紫外光之敏感性 |
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作 者 | 蔡國珍; 蔡鳳城; 陳麗玉; | 書刊名 | 臺灣水產學會刊 |
卷 期 | 24:3 1997.09[民86.09] |
頁 次 | 頁225-233 |
分類號 | 369.38 |
關鍵詞 | 水生產氣單胞菌; 溶血素; 細胞毒素; 殘氯; 紫外光; Aeromonas hydrophila; Cytotoxin; Hemolysin; Residual chlorine; UV light; |
語 文 | 英文(English) |
中文摘要 | 本研究旨在探討不同來源水生產氣單胞菌(Aeromonas hydrophila)產毒能力受溫度影響之情形,及其對水中殘氯(Residual chlorine)及紫外光敏感性之比較。不論是環境分離株(A. hydrophila No.8-169及CCRC 13980)或是臨床分離株(A. hydrophila No.3)其細胞毒素和溶血素之力價數均以28℃最高。所有菌株在37℃毒素活性均明顯降低,且無蛋白 活性。在5℃時,除了臨床分離株無法生長外,兩株環境分離株均可生長,且產生毒素。環境分離株(No.8-169及CCRC 13980)對殘氯較敏感,10cfu/ml菌體在0.1 ppm 殘氯濃度下,分別經60 min及120 min完全死亡,但臨床分離株必需在0.4 ppm濃度,120 min才完全死亡。同樣的,環境分離株對紫外光比臨床株敏感,在同樣測試條件下,A. hydrophila No.8-169,CCRC 13980及No.3之D值分別為23,30及48秒。 |
英文摘要 | The temperature effects on the production of toxins and protease, and the susceptivity to ultraviolet (UV) light and residual chlorine for Aeromonas hydrophila from various sources were studied. Both environmental strains (A. hydrophila No.8-169 and CCRC 13980) and the clinical strain (A. hydrophila No.3) had higher titers of hemolysin and cytotoxin, and caseinase and ealstinase activities at 28℃ than at 37℃. Their toxin titers were obviously decreased at 37℃ and no any protease activity was detected at this temperature. Except the clinical strain, both of the environmental strains could grow at 5℃ and produce toxins. The environmental strains were more sensitive to the residual chlorine in water. At 0.1 ppm of residual chlorine, the cells (108 cfu/ml) of A. hydrophila No.8-169 and CCRC 13980 were killed after 60 and 120 min, respectively, whereas 0.4 ppm residual chlorine and 120 min were needed for the clinical strain. Similarly, the environmental strains were also more sensitive to UV light than the clinical strain. At the same conditions, the D values of UV irradiation for A. hydrophila No.8-169, CCRC 13980 and No.3 were 23, 30, and 48 sec, respectively. |
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