Hsin Sheng College of Medical Care and Management, Taoyuan, Taiwan.
J Clin Lab Anal. 2010;24(3):139-44. doi: 10.1002/jcla.20396.
Blood culture is commonly used to detect microorganisms in patients with a suspected blood infection. This study evaluated the alkaline wash/lysis procedure to extract DNA of microorganisms in a clinical blood culture. A multiplex polymerase chain reaction (PCR) targeting the 16S rDNA (ribosomal DNA) gene and the fungal ITS (internal transcribed spacer) gene was used as a reliable indicator for the presence of microorganism DNA in the extracts. A total of 535 BacT/ALERT positive blood culture bottles were evaluated. Multiplex PCR showed positive results in 530 DNA extracts, but 5 DNA extracts gave negative results. We conclude that the alkaline wash/lysis procedure in combination with the multiplex PCR is a simple and sensitive method, which can be used in a standard diagnostic laboratory to detect microorganisms in blood culture material.
血培养常用于检测疑似血液感染患者体内的微生物。本研究评估了碱性洗涤/裂解程序,以提取临床血培养中微生物的 DNA。针对 16S rDNA(核糖体 DNA)基因和真菌 ITS(内部转录间隔区)基因的多重聚合酶链反应(PCR)被用作提取物中微生物 DNA 存在的可靠指标。共评估了 535 个 BacT/ALERT 阳性血培养瓶。多重 PCR 在 530 个 DNA 提取物中显示阳性结果,但 5 个 DNA 提取物结果为阴性。我们得出结论,碱性洗涤/裂解程序与多重 PCR 相结合是一种简单、敏感的方法,可在标准诊断实验室中用于检测血培养物中的微生物。