European Journal of Clinical Microbiology and Infectious Diseases

, Volume 12, Issue 12, pp 922–927

Polymerase chain reaction for detection ofMycobacterium tuberculosis in sputum

  • Å. B. Andersen
  • S. Thybo
  • P. Godfrey-Faussett
  • N. G. Stoker
Article

DOI: 10.1007/BF01992166

Cite this article as:
Andersen, Å.B., Thybo, S., Godfrey-Faussett, P. et al. Eur. J. Clin. Microbiol. Infect. Dis. (1993) 12: 922. doi:10.1007/BF01992166

Abstract

The polymerase chain reaction (PCR) was evaluated in a trial which, with respect to the positive-to-negative ratio, approximated the situation of a diagnostic laboratory in a tuberculosis-endemic area. Three hundred sputum samples were included in the study, of which one-third were known to contain mycobacteria as judged by direct microscopy. The repetitive insertion sequence IS6110/IS986 ofMycobacterium tuberculosis was used as a target. The samples were spiked with DNA from a modified IS6110/IS986 sequence, which gives rise to PCR products easily distinguished from PCR products amplified from chromosomalMycobacterium tuberculosis DNA. This allowed identification of samples that contained substances inhibitory to theTaq polymerase. The detection limit of the assay was 0.05 pg to 0.5 pg of purifiedMycobacterium tuberculosis DNA, corresponding to 10 to 100 organisms. The sensitivity and specificity of the PCR was compared with that of conventional microscopy and culture. It was concluded that this method is fast and sensitive, but that culture currently is crucial for assessing viability and thus infectivity.

Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1993

Authors and Affiliations

  • Å. B. Andersen
    • 1
  • S. Thybo
    • 1
  • P. Godfrey-Faussett
    • 2
  • N. G. Stoker
    • 2
  1. 1.Mycobacteria DepartmentSector for Biotechnology, Statens SeruminstitutCopenhagen SDenmark
  2. 2.Department of Clinical SciencesLondon School of Hygiene and Tropical MedicineLondonUK