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- Antimicrobial Susceptibility of Riemerella anatipestifer Isolates from Ducks and Geese and the Mutations of Gyrase Associated with Quinolone Resistance
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題 名 | Antimicrobial Susceptibility of Riemerella anatipestifer Isolates from Ducks and Geese and the Mutations of Gyrase Associated with Quinolone Resistance=鴨、鵝雷氏桿菌抗菌劑感受性與對喹諾酮類藥物抗藥性有關之Gyrase突變 |
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作 者 | 陳燕萍; 李淑慧; 潘銘正; 陳秋麟; 沈瑞鴻; 張聰洲; 蔡向榮; | 書刊名 | 臺灣獸醫學雜誌 |
卷 期 | 38:1 2012.03[民101.03] |
頁 次 | 頁7-18 |
分類號 | 437.243 |
關鍵詞 | 抗菌劑感受性; 喹諾酮類藥物; 抗藥性; 雷氏桿菌; Antimicrobial susceptibility; Gyrase; Quinolones; Resistance; Riemerella anatipestifer; |
語 文 | 英文(English) |
中文摘要 | 本研究以瓊脂紙錠擴散法調查於1999年至2009年在臺灣分離之222株水禽雷氏桿菌對22種抗菌劑之藥物感受性。結果顯示,大多數菌株具有多重抗菌性,所有菌株對colistin、nalidixic acid與kanamycin等較具抗藥性,對nitrofuratoin(已於2004年被禁止使用於動物)、doxycycline與amoxycillin/clavulanic acid等較具感受性。此外,多種抗菌劑的抗藥性和多重抗藥性菌株的比率在2009年皆有明顯增加(p< 0.05)。另一方面,本研究亦調查雷氏桿菌與喹諾酮類藥物抗藥性相關之gyrase突變。大部分對喹諾酮類藥物感受性降低的菌株在GyrA上具Ser10→Pro和/或Ser83→Arg/lle突變且在GyrB上具Thr140→lle、lle503→Val和/或Gln155→Lys突變。值得注意的是,一株較不尋常的對nalidixic acid有感受性但對enrofloxacin有抗藥性之菌株,僅於GyrA之Gly81→ASP產生突變,而在GyrB沒有改變。本研究結果可作為台灣選擇抗菌劑治療雷氏桿菌症之用藥參考。此外,本研究亦為雷氏桿菌之喹諾酮類藥物抗藥性與gyrase突變相關性之首次報告。 |
英文摘要 | This study evaluated the susceptibility of 222 Taiwanese Riemerella anatipestifer isolated from domestic waterfowl between 1999 and 2009 to 22 antimicrobials by agar disk diffusion method. Results showed that most isolates were multi-antimicrobial resistance. R. anatipestifer isolates were most resistant to colistin, nalidixic acid and kanamycin and most susceptible to nitrofurantoin which has been banned for use in domestic animals in 2004, doxycycline and amoxycillin/clavulanic acid. Furthermore, the resistance rates to several antimicrobials and multi-resistance were increased obviously in 2009. In addition, this study investigated the mutations of gyrase associated with quinolone resistance in R. anatipestifer. Most isolates with reduced susceptibility to quinolones possessed amino acid alterations at Ser10→Pro and/or Ser83→Arg or Ile in GyrA and at Thr140→Ile, Ile503→Val and/or Gln155→Val in GyrB. Noteworthily, one isolate with an unusual susceptibility profile which was nalidixic acid-susceptible but enrofloxacin-resistant possessed only one mutation at Gly81→ Asp in GyrA and no change in GyrB. Results of this study can be used to select effective chemotherapies for R. anatipestifer infection in Taiwan. In addition, this study also provides information on a potential association between gyrase mutations and quinolone resistance in R. anatipestifer. |
本系統中英文摘要資訊取自各篇刊載內容。