γ/δ T lymphocytes in Mycobacterium tuberculosis infection

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Abstract

Background - Data on the percentage of γ/δ T lymphocytes in the peripheral blood of patients infected with Mycobacterium tuberculosis are few and contradictory. The percentage of γ/δ T lymphocytes in the peripheral blood of tuberculin positive and tuberculin negative patients with Mycobacterium tuberculosis infection and healthy controls was compared. Methods - Thirty six patients infected with Mycobacterium tuberculosis and 11 healthy controls were studied. Lymphocytes were separated, cytocentrifuged onto glass microscope slides, and reacted with anti-γ/δ monoclonal antibody. The percentage of γ/δ positive cells was determined by microscopic counting of 300 lymphocytes. Results - No difference was found in the percentage of γ/δ T lymphocytes between patients and controls. However, when the patients were divided into two groups according to reactivity or non-reactivity in the Mantoux skin reaction a higher percentage of γ/δ T lymphocytes was found in the peripheral blood of patients with tuberculin anergy than in tuberculin positive patients or controls. Conclusions - Higher γ/δ T cell counts are found in tuberculin negative patients with tuberculosis than in tuberculin positive patients or tuberculin positive controls. The high γ/δ T cell counts in tuberculin anergic patients may reflect a shift in the immune response in a Th2 direction characterised by increased antibody production and decreased cell mediated responses.

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CITATION STYLE

APA

Balikó, Z., Szereday, L., & Szekeres-Bartho, J. (1997). γ/δ T lymphocytes in Mycobacterium tuberculosis infection. Thorax, 52(4), 375–377. https://doi.org/10.1136/thx.52.4.375

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