A critical look at the diagnostic value of culture-confirmation in childhood tuberculosis

J Infect. 2006 Dec;53(6):364-9. doi: 10.1016/j.jinf.2005.12.025. Epub 2006 Feb 7.

Abstract

Objectives: To describe the clinical presentation, delay in diagnosis and treatment initiation, and outcome of culture-confirmed childhood tuberculosis.

Methods: Retrospective study of children<13 years of age at Tygerberg Children's Hospital, Cape Town, South Africa with culture-confirmed tuberculosis seen January 2002-June 2003. Data were collected by review of hospital and clinic records.

Results: Culture-confirmed tuberculosis was diagnosed in 184 children, median age 36 months; 26 (14.1%) were diagnosed clinically and treatment was started before admission. Tuberculosis was newly diagnosed in 158 children; 127 (80.4%) were clinically diagnosed and 31 (19.6%) were diagnosed only after culture result was known (culture-diagnosed). The median time from admission to diagnosis was 1 day (1-21 days) for clinically diagnosed, and 73 (34-178 days) for culture-diagnosed children. Treatment was initiated by hospital physicians in all 127 clinically diagnosed and 14/31 culture-diagnosed children. Of the 17 culture-diagnosed children not started on treatment, 4 were subsequently diagnosed on clinical grounds and treated at clinic level, 8 were found in good health, 4 failed to follow-up and 1 neonate died before the culture result was known.

Conclusions: In symptomatic children, the vast majority could be confidently diagnosed on clinical grounds. However, culture-confirmation remains valuable to establish drug susceptibility.

MeSH terms

  • Child
  • Child, Preschool
  • Clinical Laboratory Techniques
  • Enzyme-Linked Immunosorbent Assay
  • Female
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Medical Records
  • Polymerase Chain Reaction
  • Retrospective Studies
  • South Africa / epidemiology
  • Time Factors
  • Tuberculosis, Pulmonary / diagnosis*
  • Tuberculosis, Pulmonary / epidemiology
  • Tuberculosis, Pulmonary / physiopathology