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Related Experiment Videos

T-lymphocyte subpopulations in tuberculosis.

S Swaminathan1, K S Nandini, L E Hanna

  • 1Tuberculosis Research Center, Chennai, 600 031, India. Center for pulmonary and Infectious Disease Control, University of Texas Health Center at Tyler, Texas, USA.

Indian Pediatrics
|May 23, 2000
PubMed
Summary
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Pediatric tuberculosis is linked to lower numbers of CD3+ and CD4+ T cells. Treatment for tuberculosis in children effectively restores these vital immune cell counts.

Area of Science:

  • Immunology
  • Pediatrics
  • Infectious Diseases

Background:

  • Tuberculosis (TB) impacts cell-mediated immunity, causing both qualitative and quantitative immune defects.
  • Immune system alterations in children with TB, particularly lymphocyte profiles, remain incompletely understood.

Purpose of the Study:

  • To investigate changes in lymphocyte subpopulations in children diagnosed with tuberculosis.
  • To assess the impact of antituberculosis therapy on these lymphocyte changes.

Main Methods:

  • A prospective study was conducted involving children at referral hospitals.
  • Lymphocyte subpopulations were analyzed using flow cytometry.
  • Participants included healthy controls, children with newly diagnosed pulmonary TB, and children undergoing TB treatment.

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Main Results:

  • Children with TB exhibited reduced absolute numbers and percentages of CD3+ and CD4+ T cells compared to healthy controls.
  • A significant increase in CD4+ T cell counts was observed after antituberculosis therapy.
  • The proportion of T cells expressing the gamma delta T cell receptor remained similar between TB patients and controls.

Conclusions:

  • Pediatric tuberculosis is associated with a systemic reduction in CD3+ and CD4+ T cells.
  • Antituberculosis therapy leads to a reversal of these T cell deficits in children.