多重滴滴数字聚合酶连锁反应,用于在患有血液恶性瘤的患者中快速诊断疑似血液感染
Fangyi Dong1, Shishuang Wu1, Xiaoqiang Fan2
1Shanghai Institute of Hematology, State Key Laboratory of Medical Genomics, National Research Center for Translational Medicine at Shanghai, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
与传统血液培养相比,滴滴数字PCR (ddPCR) 显著改善了急性白血病患者的病原体检测. 这种敏感的方法有助于识别感染和耐药基因,以改善患者的治疗结果.
科学领域:
- 医学诊断 医学诊断 医学诊断
- 分子生物学分子生物学
- 传染病研究 传染病研究
背景情况:
- 患有急性白血病的患者面临来自疾病,化疗和移植的高感染风险.
- 延迟或不充分的感染治疗会对癌症治疗结果,生存率和成本产生负面影响.
- 传统的血液培养 (BCs) 对病原体识别的敏感性和速度有局限性.
研究的目的:
- 评估滴滴数码PCR (ddPCR) 用于敏感检测血液中的病原体DNA和耐药基因.
- 为了比较ddPCR的诊断性能与传统血液培养 (BCs) 在怀疑血液感染 (BSIs) 的中性衰竭患者.
主要方法:
- 招募了47名患有血液恶性瘤和中性衰竭发烧 (疑似BSI) 的成年患者队列.
- 血液样本在发烧的第一,第三和第五天使用ddPCR检测细菌,真菌和病毒.
- 用 ddPCR 阳性细菌感染的剩余核酸样本分析药物耐药性基因.
主要成果:
- 在29.79%的患者中,ddPCR检测到细菌,明显高于BCs (10.64%).
- ddPCR确定了10种病原体,而BCs只有5种,并且在单个样本中检测到多种病原体.
- ddPCR在四名患者中发现了耐药性基因,包括卡巴酶和mecA.
结论:
- 与BCs相比,ddPCR提供了更高的灵敏度和病原体检测范围.
- ddPCR可以识别耐药基因,为治疗提供关键信息.
- ddPCR是传统血液培养的宝贵补充工具,用于管理免疫功能低下患者的感染.
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