在实验室模型中Malassezia pachydermatis获得了对多元体的耐药性
Urszula Czyżewska1, Sandra Chmielewska2,3, Marek Bartoszewicz1
1Department of Microbiology and Biotechnology, Faculty of Biology, University of Bialystok, K. Ciolkowskiego 1J, 15-245 Bialystok, Poland.
Pathogens (Basel, Switzerland)
|November 27, 2025
概括
这项研究模拟了马拉塞西亚巴赫德马蒂斯如何对尼斯塔丁等抗真菌药物产生耐受性. 一些菌株随着时间的推移发展出稳定的耐药性,突出显示出需要更好的抗真菌策略.
科学领域:
- 菌类学 菌类学是指菌类学.
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 马拉塞西亚巴赫德马蒂斯是一种酵母物种,经常涉及到狗外耳炎.
- 增加抗真菌耐药性在治疗真菌感染方面构成了重大挑战.
- 聚烯抗真菌药物,如尼斯塔丁和纳塔米,对于治疗马拉西亚菌感染至关重要.
研究的目的:
- 为了研究马拉西 (Malassezia pachydermatis) 中对尼斯塔丁和纳塔胺素的耐受性发展.
- 建立一个观察导致抗真菌药物耐药性的连续变化的模型.
- 确定影响M. pachydermatis菌株药物适应的因素.
主要方法:
- 十种M. pachydermatis菌株经过105周的连续传递,在nystatin和natamycin的亚致命度的媒介上进行了连续传递.
- 定期确定最小抑制度 (MIC) 和最小杀菌度 (MFC) 的值.
- 无毒经验被用来评估获得性耐药性的稳定性.
主要成果:
- 在M. pachydermatis菌株中观察到对药物压力的可变反应.
- 一些菌株的MIC值逐渐增加,尼斯塔丁的MIC值增加了五倍.
- 在药物戒断后的几个菌株中,获得的耐药性是稳定的,而其他菌株则恢复了敏感性.
- 经过30-45个通道后观察到显著的耐受性发展,而不是立即.
结论:
- 开发的模型有效地追踪了抗真菌耐受性的顺序变化.
- 这种模型可以帮助识别易感菌株并评估治疗风险,特别是在免疫受损的个体中.
- 这些发现支持针对真菌感染开发有针对性的疗法和耐药性预测算法.
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