新出现的挑战 凝结酶阴性葡萄球菌对甲素的耐药性
Marta Katkowska1, Maja Kosecka-Strojek2, Mariola Wolska-Gębarzewska2,3
1Department of Oral Microbiology, Medical Faculty, Medical University of Gdansk, 80-204 Gdansk, Poland.
Antibiotics (Basel, Switzerland)
|January 25, 2025
概括
准确检测凝血酶阴性葡萄球菌 (CoNS) 中的甲素耐药性是具有挑战性的. 这项研究强调了改善实验室诊断的必要性,以正确识别素敏感甲素耐药性CoNS (OS-MRCoNS) 和边界素耐药性CoNS (BORCoNS).
科学领域:
- 临床微生物学 临床微生物学
- 抗微生物耐药性 抗微生物耐药性
- 分子诊断学 分子诊断学
背景情况:
- 凝聚酶阴性葡萄球菌 (CoNS) 是重要的机会性病原体.
- 准确识别CONS中甲素耐药性对于有效治疗至关重要.
- 低水平的耐药性和边界病例带来了诊断挑战.
研究的目的:
- 通过表型和分子方法来确定CoNS中的牛素敏感性.
- 为了估计OS-MRCoNS和BORCoNS的流行率.
- 评估用于识别这些耐药菌株的诊断方法.
主要方法:
- 对101种CoNS菌株进行查,以检测它们对素和素的敏感性.
- 使用的表型方法:光盘扩散,阿加稀释,乳聚合和CHROMagar.
- 使用的分子方法:检测mecA,mecB,mecC和SCCmec的类型.
主要成果:
- 15.8%的CoNS菌株是mecA阳性;6.9%被归类为OS-MRCoNS.
- 11.9%的mecA阴性菌株被归类为BORCoNS.
- 氧素盘扩散精确地确定了OS-MRCoNS,但不是BORCoNS;乳聚合和CHROMagar确定了BORCoNS,但不是OS-MRCoNS.
结论:
- 在CoNS中识别甲素耐药性需要一个细致的诊断方法.
- 目前的实验室方法在准确识别OS-MRCoNS和BORCoNS方面存在局限性.
- 需要进一步的研究来开发统一的诊断算法,以防止错误报告.
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