刃天青微量板法对沙门氏菌的抗菌敏感性试验
2021-03-01任奕婧孙嘉笛孙秀兰
任奕婧 孙嘉笛 孙秀兰



摘要 采用刃天青微量板法检测多株沙门氏菌对抗生素的耐药性,得到最小抑菌浓度(MIC)。通过肉眼观察和荧光检测都可判定沙门氏菌的耐药性,判定时间仅需5 h,刃天青法与微量肉汤稀释法检测得到的耐药性结果一致。其中用颜色观察能更清晰明确地分辨出耐药折点,荧光检测可以动态地反映细菌随时间变化的生长情况。刃天青微量板法具有简便、快速、灵敏度高的特点,能确定抗生素的耐药性和精确耐药MIC值。
关键词 沙门氏菌;药敏试验;刃天青微量板法
中图分类号 R446.5 文献标识码 A 文章编号 0517-6611(2021)03-0199-04
doi:10.3969/j.issn.0517-6611.2021.03.053
Abstract The resazurin microplate method was used to detect the resistance of several Salmonella strains to antibiotics, and the minimum inhibitory concentration (MIC) was obtained.The drug resistance of Salmonella could be determined by visual inspection and fluorescence detection, and the determination time was only 5 hours. The drug resistance results obtained by the resazurin method and the micro broth dilution method were consistent. Among them, color observation could more clearly distinguish drugresistant turning points, and fluorescence detection could dynamically reflect the growth of bacteria over time. The resazurin microplate method was simple, fast and highly sensitive. It could determine antibiotic resistance and precise resistance MIC values.
Key words Salmonella;Antibiotic sensitivity test;Resazurin microplate method
沙門氏菌(Salmonella)作为一种食源性病原体,对人类健康构成了巨大威胁。沙门氏菌可通过受污染的畜禽产品、蛋、奶乃至海洋产品感染人类[1-7]。近年来,由于抗生素的广泛使用,出现了沙门氏菌耐药株和多重耐药株,导致沙门氏菌耐药性问题日益严重,对畜牧业和人类健康都构成了潜在威胁[8-9]。
为了应对这种威胁,迫切需要进行抗生素敏感测试(AST),以快速诊断这些危险细菌的耐药性,确保快速、准确地使用抗生素。当前,各种传统实验室方法可用来表征微生物对抗生素的体外敏感性,如常量肉汤稀释和微量肉汤稀释法、圆盘扩散法和抗菌梯度法等。但是,这些方法多数都需要冗长的测试程序,通常需要经历收集样品、富集培养物,在这之后还至少需要孵育16 h才能进行检测[10-11]。耐药细菌的流行率增加表明现在迫切需要能够在数小时而不是数天之内提供药敏性数据的AST。……
