从住院患者中分离出来的抗万科米辛抗性肠球菌的细胞毒性活性
Ewa Szczuka1, Dominika Rolnicka1, Maria Wesołowska1,2
1Department of Microbiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
Pathogens (Basel, Switzerland)
|October 25, 2024
概括
抗胺素抗性肠道球菌 (VRE) 是一个日益增长的威胁,表现出多种药物耐药性和对线索利德和tigecycline的新兴耐药性. 这项研究在VRE分离物中确定了关键的耐药基因,如vanA和氨基糖化物修饰酶.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 分子生物学分子生物学
背景情况:
- 抗菌素的肠球菌 (VRE) 是重要的医院病原体.
- 越来越多的抗生素耐药性在VRE中构成了重大的公共卫生挑战.
- VRE感染可能是危及生命的.
研究的目的:
- 为了描述VRE分离物的抗生素耐药性概况.
- 确定导致万科米辛和氨基糖化物耐药性的特定基因.
- 评估VRE.的细胞毒性活性.
主要方法:
- 从各种临床标本中收集了VRE分离物.
- 使用MALDI TOF进行了物种鉴定.
- 进行了抗生素敏感性测试.
- 分子分析确定了氨基糖化物修饰酶 (AME) 基因和vanA基因.
主要成果:
- 确定了37种VRE菌株,主要是Enterococcus faecium (81.1%) 和Enterococcus faecalis (18.9%).
- 隔离物表现出多种药物耐药性,包括对青素,诺基诺的耐药性,以及对线化物和tigecycline的新兴耐药性.
- 鉴定了双功能 aac6' -Ie-aph2' -Ia 和 aph3' -IIIa 基因,这些基因有助于高水平的氨基糖化物耐药性 (HLAR). 所有的菌株都携带了vanA基因.
- 来自殖民胃肠道和感染的VRE分离物显示出对HEp-2细胞的细胞毒性活性.
结论:
- VRE分离体表现出广泛的多药性耐药性,包括对新药的耐药性.
- 特定的AME基因和vanA基因的存在对于VRE耐药机制至关重要.
- VRE具有细胞毒性潜力,有助于其致病性.
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