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The MODS method for diagnosis of tuberculosis and multidrug resistant tuberculosis
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The MODS method for diagnosis of tuberculosis and multidrug resistant tuberculosis

Published on: August 11, 2008

Laboratory diagnosis of tuberculosis in a large pediatric hospital in Cambodia

K Schopfer1, H L Rieder, T Bodmer

  • 1Institute of Infectious Diseases, University of Berne, Switzerland. kurt.schopfer@bluewin.ch

The International Journal of Tuberculosis and Lung Disease : the Official Journal of the International Union Against Tuberculosis and Lung Disease
|February 14, 2012
PubMed

Insights

Rapid molecular testing for tuberculosis (TB) in children is highly efficient, with rRNA amplification identifying over 90% of confirmed cases. On-site laboratory results were available within 48 hours for most children.

Area of Science:

  • Pediatric infectious diseases
  • Clinical microbiology
  • Molecular diagnostics

Background:

  • Tuberculosis (TB) diagnosis in children presents unique challenges.
  • Accurate and timely laboratory confirmation is crucial for effective treatment.
  • Pediatric hospital settings require efficient diagnostic workflows.

Purpose of the Study:

  • To assess the diagnostic efficiency of on-site microscopy and rRNA amplification for tuberculosis in children.
  • To evaluate specimen sampling strategies for culture in a pediatric setting.
  • To determine the turnaround time for on-site laboratory results.

Main Methods:

  • Retrospective analysis of pediatric TB cases from July 2005 to March 2006.
  • Comparison of results from microscopy, rRNA amplification, and culture.
  • Evaluation of specimen viability for culture after shipment delay.

Main Results:

  • Out of 52,400 admissions, 405 children had TB, with 91 laboratory-confirmed cases.
  • rRNA amplification identified 91.2% of cases confirmed by microscopy or rRNA assay.
  • rRNA identified 90.5% of culture-confirmed cases; culture alone contributed 7.1% to confirmed cases.
  • Specimen viability for culture was not affected by shipment delay.
  • On-site laboratory results were available within 48 hours for 97.4% of children.

Conclusions:

  • Implementing a mycobacteriology service with molecular techniques is feasible in referral hospitals.
  • rRNA amplification is a highly efficient method for diagnosing pediatric TB.
  • Proper specimen storage ensures culture viability despite shipment delays.
Abstract

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