NDLI: Quantitative Detection of Borrelia burgdorferi by Real-Time PCR

Content Provider	PubMed Central
Author	Pahl, Andreas Uta, Kühlbrandt Brune, Kay Martin, Röllinghoff Gessner, André
Copyright Year	1999
Abstract	Currently, no easy and reliable methods allowing for the quantification of Borrelia burgdorferi in tissues of infected humans or animals are available. Due to the lack of suitable assays to detect B. burgdorferi CFU and the qualitative nature of the currently performed PCR assays, we decided to exploit the recently developed real-time PCR. This technology measures the release of fluorescent oligonucleotides during the PCR. Flagellin of B. burgdorferi was chosen as the target sequence. A linear quantitative detection range of 5 logs with a calculated detection limit of one to three spirochetes per assay reaction mixture was observed. The fact that no signals were obtained with closely related organisms such as Borrelia hermsii argues for a high specificity of this newly developed method. A similar method was developed to quantify mouse actin genomic sequences to allow for the standardization of spirochete load. The specificity and sensitivity of the B. burgdorferi and the actin real-time PCR were not altered when samples were spiked with mouse cells or spirochetes, respectively. To evaluate the applicability of the real-time PCR, we used the mouse model of Lyme disease. The fate of B. burgdorferi was monitored in different tissues from inbred mice and from mice treated with antibiotics. Susceptible C3H/HeJ mice had markedly higher burdens of bacterial DNA than resistant BALB/c mice, and penicillin G treatment significantly reduced the numbers of spirochetes. Since these results show a close correlation between clinical symptoms and bacterial burden of tissues, we are currently analyzing human biopsy specimens to evaluate the real-time PCR in a diagnostic setting.
Starting Page	1958
File Format	PDF
ISSN	1098660X
e-ISSN	1098660X
Journal	Journal of Clinical Microbiology
Issue Number	6
Volume Number	37
Language	English
Publisher	American Society for Microbiology
Publisher Date	1999-06-01
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Microbiology (medical)

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