银纳米颗粒对MDR的抗菌活性Corynebacterium伪结核病从病例性淋巴腺炎病例中分离出来
Eman M Elghazaly1, Hebatallah M Saad2, Samy A Khaliel3
1Department of Microbiology, Faculty of Veterinary Medicine, MatrouhUniversity, MarsaMatruh, 51744, Egypt.
Microbial pathogenesis
|September 18, 2025
概括
银纳米颗粒 (Ag-NPs) 在治疗泛耐药的Corynebacterium伪结核病方面表现有前途,这种病因是牲畜中病变性淋巴结核炎的原因. Ag-NPs有效地破坏了细菌.
科学领域:
- 兽医微生物学 兽医微生物学
- 纳米技术纳米技术
- 传染性疾病 传染性疾病
背景情况:
- 科里尼细菌伪结核病 (Corynebacterium pseudotuberculosis,C. pseudotuberculosis) 是一种致动物性病原体,会导致绵羊和山羊的慢性淋巴腺炎 (Caseous lymphadenitis,CLA) 等慢性疾病.
- 这种病原体对人类健康构成风险,并且由于抗生素耐药性,治疗结果不佳.
- 泛耐药菌株在兽医领域是一个重大挑战.
研究的目的:
- 研究银纳米颗粒 (Ag-NPs) 对抗一种全抗药性C. pseudotuberculosis菌株的疗效.
- 为了确定Ag-NPs的最小抑制度 (MIC) 和最小杀菌度 (MBC).
- 用扫描电子显微镜 (SEM) 评估Ag-NPs对C.伪结核病的形态影响.
主要方法:
- 从受感染的绵羊和山羊样本中分离和识别C.伪结核病.
- 现型方法,几内亚猪的致病性测试,以及16S rRNA基因的PCR进行确认.
- 抗生素敏感性测试和确定Ag-NP的MIC和MBC值.
- 扫描电子显微镜 (SEM) 可视化细菌形态变化.
主要成果:
- 在120个样本中,10%的样本为C. pseudotuberculosis呈阳性.
- 鉴定出了一种全抗药性C.伪结核菌株,该菌株对六种抗生素类别有抗性.
- Ag-NPs的MIC为0.1 mg/ml (100 ppm),而MBC为0.05 mg/ml (50 ppm). 在这种情况下,Ag-NPs的MIC是0.1 mg/ml (100 ppm),而MBC则是0.05 mg/ml (50 ppm).
- 在用Ag-NPs治疗的C.伪结核病中,SEM揭示了显著的形态损伤,包括膜破裂.
结论:
- 银纳米颗粒显示出强大的抗菌活性,对抗泛耐药性C.伪结核病.
- Ag-NPs可以作为一种新的治疗药物,用于治疗病变性淋巴结核炎 pyogranulomas.
- 这项研究强调了纳米技术在对抗牲畜抗生素耐药性细菌感染方面的潜力.
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