糖尿病足的细菌学概况,特别参考生物膜形成
Nitya Tirumala1, Leela Rani K2
1Medicine, Vydehi Institute of Medical Sciences and Research Centre, Bangalore, IND.
Cureus
|April 22, 2025
概括
糖尿病足 (DFU) 通常是由形成生物膜的多药耐药生物体 (MDROs) 引起的,增加毒性和抗生素耐药性. 检测生物膜的形成可以指导抗生素的选择,减少MDRO的发展,加快DFU的愈合.
科学领域:
- 微生物学 微生物学
- 传染性疾病 传染性疾病
- 糖尿病学 糖尿病学
背景情况:
- 糖尿病是一种全球性健康问题,印度的病例数量最多.
- 糖尿病足 (DFU) 影响8-17%的糖尿病患者,通常是由多微生物和多抗药性 (MDR) 感染引起的.
- 生物膜的形成显著增强了细菌的毒性和抗生素耐药性,使DFU治疗和愈合复杂化.
研究的目的:
- 调查糖尿病足样本中生物膜形成细菌的流行情况.
- 确定DFU中常见的细菌物种及其抗生素敏感性模式.
- 评估生物膜形成,多药性耐药性和DFU中的细菌物种之间的相关性.
主要方法:
- 从患者那里收集了74个DFU样本.
- 利用格拉姆染色用于直接显微镜和生物体识别.
- 使用刚果红甲板检测生物膜形成细菌.
主要成果:
- 93.24%的样本产生了细菌生长;格拉姆阴性细菌占主导地位,其中Pseudomonas aeruginosa,Klebsiella pneumoniae,Proteus mirabilis和Escherichia coli是最常见的.
- 超过75%的分离物对安皮西林, cefuroxime 和 erythromycin 呈现出耐药性,而对埃尔塔佩内姆, 梅罗佩内姆, 艾米卡辛, جنت米辛, zylpenicillin, 米辛和 克林达米辛的敏感性很高.
- 42.03%的阳性培养形成了生物膜,Pseudomonas aeruginosa是最常见的生物膜前者. 值得注意的是,100%的多耐药生物体 (MDROs) 是生物膜形成者,而Staphylococcus aureus分离物显示100%的生物膜形成.
结论:
- 生物膜形成是DFU毒性和抗生素耐药性的关键因素.
- 在DFU样本中检测生物膜形成细菌是指导抗菌疗法的可行方法.
- 确定生物膜生产者可以帮助减少MDROs的发展,并加速糖尿病患者的伤口愈合.
相关概念视频
01:29Biofilms
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
01:31Diabetic Foot Ulcer
Definition A diabetic foot ulcer (DFU) is a chronic, non-healing wound that develops in individuals with diabetes. It typically occurs on pressure-bearing areas such as the heel, metatarsal heads, or hallux, and carries a high risk of infection and amputation.Pathophysiology • The development of DFUs can be explained by four interconnected mechanisms: neuropathy, ischemia, infection, and impaired wound healing. • Neuropathy is the most common factor. Sensory neuropathy reduces pain perception,...