Johnson S R, Martin D H, Cammarata C, Morse S A
Division of Sexually Transmitted Disease Laboratory Research, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
J Clin Microbiol. 1995 Apr;33(4):1036-8. doi: 10.1128/jcm.33.4.1036-1038.1995.
A PCR assay for the detection of Haemophilus ducreyi in clinical specimens taken from genital ulcers was developed. Although H. ducreyi, when present in such specimens, could be detected by PCR, the sensitivity of the assay was reduced by the presence of Taq polymerase inhibitors in the specimen. The sensitivity of the PCR assay was improved by the use of detergents in preparing nuclei acids from clinical specimens and by the inclusion of a dialysis step prior to amplification. In addition, sodium phosphate included in the transport medium was found to be an inhibitor of the Taq polymerase.
开发了一种用于检测从生殖器溃疡采集的临床标本中杜克雷嗜血杆菌的聚合酶链反应(PCR)检测方法。虽然当此类标本中存在杜克雷嗜血杆菌时可通过PCR检测到,但标本中Taq聚合酶抑制剂的存在会降低该检测方法的灵敏度。通过在从临床标本制备核酸时使用去污剂以及在扩增前加入透析步骤,提高了PCR检测方法的灵敏度。此外,发现运输培养基中所含的磷酸钠是Taq聚合酶的一种抑制剂。