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題 名 | Studies on Curing Methods for Identifying R-plasmids in Reuterin-Producing Lactobacillus Reuteri(RPLR)=翦除法鑑定洛德因乳酸桿菌抗藥質體研究 |
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作 者 | 柯尚余; 張登欽; 吳春利; 楊忠亮; | 書刊名 | 臺灣畜牧獸醫學會會報 |
卷 期 | 64 1994.12[民83.12] |
頁 次 | 頁77-90 |
分類號 | 437.243 |
關鍵詞 | 抗藥質體; 洛德因乳酸桿菌; 抗藥性; R-plasmids; Lactobacillus reuteri; Antibiotic resistant trait; |
語 文 | 英文(English) |
中文摘要 | 本試驗依照翦除藥劑的種類濃度及翦除溫度的差異等因素,共計組合68種翦除條 件,以檢視其對95株PRLR菌的翦除抗藥性能力結果發現只有12種條件能對23株PRLR菌有 上述功能,其抗藥性翦除率,分別是青黴素1.3%(1/76),紅黴素 11.6%(11/95),氯黴素 7.6%(4/52),及紅黴素並氯黴素13.4%(7/52)將RPLR菌在含0.39 ug/mL Ethidium bromide 的LCMG培養液中繼代,可翦除6株RPLR菌的抗藥性,是12種條件中能力最強者;其餘11 種平均皆只能翦除2∼3株菌的抗藥性而已本試驗無法找出一種翦除條件可同時適用於所有 RPLR菌;翦除條件的選擇,似乎隨菌株的不同而有差異由翦除前後菌株質体相的差異比較, 共計可鑑定出(1)。四個抗紅黴素質体(pTE32, 4.5-Kb; pTE32, 7.5-Kb; pTE33, 7.0-Kb; pTE36, 16.0-Kb),(2)。一個抗氯黴素質体(pTC82; 7.0-Kb), (3)。三個抗紅黴素並抗氯黴素質体(pEC27, 16.0-Kb; pEC67, 16.0-Kb; pEC68; 16.0-Kb),本試驗所發現的抗紅黴素並抗氯黴素質体, 在RPLR菌尚屬首次。 |
英文摘要 | Sixty eight conditions, based on the combination of factors including kinds of chemicals, concentrations of chemicals, and cultivation temperature, were designed to test the curing effect on 95 RPLR strains bearing well-defined antibiotic resistant traits (R-traits). Only 12 conditions exhibited curing efficiency on eliminating R-trait(s) from 23 RPLR strains in this study. The R-trait(s) curing rates(%) for penicillin resistance (Pn-r), erythromycin resistance (Em-r), chloramphenicol resistance (Cm-r) and Em-r+Cm-r were 1.3(1/76), 11.6(11/95), 7.6(4/52), and 13.4(7/52) respectively. Passages of culture in LCMG media containing subinhibitory concentration (0.39 ug/mL) of ethidium bromide was the most powerful condition capable of curing R-trait(s) from 6 strains. The other 11 conditions could eliminate R-trait(s) fro an average of 2 ~ 3 strains only. Our result did not allow us to choose one curing method applicable for every R-trait(s) bearing RPLR strain, and we think the choice must be made specifically for each individual strain. Analysis of plasmid profiles between parent strains and cured strains enabled us to identify (1) four Em-r plasmids (pTE31, 4.5-Kb; pTE32, 7.5-Kb; pTE33, 7.0-Kb; pTE36, 16.0-Kb), (2) one Cm-r plasmid (pTC82; 7.0-Kb). And (3) three Em-r+Cm-r plasmids (pEC27, 16.0-Kb; pEC67, 16.0-Kb; pEC68; 16.0-Kb). This is the first evidence of plasmids encoding Cm-r+Em-r in Lac reuteri. |
本系統中英文摘要資訊取自各篇刊載內容。