检验医学 ›› 2017, Vol. 32 ›› Issue (10): 879-882.DOI: 10.3969/j.issn.1673-8640.2017.010.010

• 临床应用研究·论著 • 上一篇    下一篇

亚抑菌浓度阿奇霉素与妥布霉素联合应用对铜绿假单胞菌疗效的分析

范雪梅   

  1. 仁寿县人民医院检验科, 四川 眉山 620500
  • 收稿日期:2016-08-31 出版日期:2017-10-20 发布日期:2017-11-20
  • 作者简介:null

    作者简介:范雪梅,女,1982年生,学士,技师,主要从事微生物耐药机制与治疗研究。

Efficiency of azithromycin and tobramycin drug combination on Pseudomonas aeruginosa

FAN Xuemei   

  1. Department of Clinical Laboratory,Renshou People's Hospital,Meishan 620500,Sichuan,China
  • Received:2016-08-31 Online:2017-10-20 Published:2017-11-20

摘要:

目的 探讨阿奇霉素(AZM)与妥布霉素(TOB)联合应用对铜绿假单胞菌浮游菌和生物膜的抑制作用。方法 采用棋盘稀释法检测AZM与TOB联合应用对铜绿假单胞菌标准菌株PAO1及2株临床分离株PA0121和PA1324浮游菌的抗菌活性;通过96孔板构建生物膜结合结晶紫染色法检测2种抗菌药物联合应用对铜绿假单胞菌生物膜形成的抑制作用。结果 AZM与TOB联合应用对3株铜绿假单胞菌浮游菌的抑菌指数(FIC)均为2.0,联合应用效果表现为无关作用。1 μg/mL AZM能明显促进0.25、0.5及1 μg/mL TOB抑制PAO1生物膜的作用(P<0.05),且当AZM浓度升高到2 μg/mL时,其协同作用更明显。亚抑菌浓度的AZM也能促进TOB抑制临床分离株PA0121和PA1324生物膜的形成(P<0.05)。结论 AZM与TOB联合应用对铜绿假单胞菌浮游菌的抑制效果表现为无关作用,但能协同抑制生物膜的形成。

关键词: 阿奇霉素, 妥布霉素, 铜绿假单胞菌, 生物膜, 协同作用, 联合用药

Abstract:

Objective To investigate the inhibitory effect of azithromycin(AZM) and tobramycin(TOB) drug combination on Pseudomonas aeruginosa and biofilm. Methods Chequer board dilution method was used to determine the inhibitory activity of AZM and TOB drug combination on Pseudomonas aeruginosastandard isolate(PAO1)and clinical isolates(PA0121 and PA1324) in planktonic form. The combined method of 96-well plates with crystal violet staining was used to determine the inhibitory effect of AZM and TOB drug combination on Pseudomonas aeruginosa biofilm formation. Results The fractional inhibitory concentration(FIC) index of the 3 isolates was 2. However,1 μg/mL AZM could enhance the inhibitory effect of 0.25,0.5 and 1 μg/mL TOB on PAO1 biofilm formation(P<0.05). The synergistic effect was obvious at AZM level 2 μg/mL with inhibitory effect on PA0121 and PA1324 biofilm formation(P<0.05). Conclusions There is a synergistic effect of AZM and TOB drug combination on Pseudomonas aeruginosa in biofilm formation but independent effect in planktonic form.

Key words: Azithromycin, Tobramycin, Pseudomonas aeruginosa, Biofilm, Synergistic effect, Drug combination

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