Lymphocyte subsets phenotype in patients with infectious mononucleosis

الملخص EN

Background : Infectious mononucleosis (IM) is a lymphoproliferative disease caused primarily by the Epstein-Barr virus (EBV) infection.

The initial viral infection by EBV occurs in B lymphocytes and is followed by an extensive proliferation of T lymphocytes.

Previous studies on immunity to EBV (including IM) have mainly focused on activation of peripheral blood T cells, which are responsible for the lymphocytosis in blood during acute IM. Patients and Methods : Indirect immunofluorescence technique analysis was performed to detect the percentage of CD3, CD4, CD8, CD19, and CD56 positive lymphocytes. Results : Our results on the phenotype of T cells in samples from patients with infectious mononucleosis showed that there is a significant increase in percentage of CD8+ T-cells when compared with healthy group.

In addition, increased in percentage of CD3 T-cells and moderately increase in CD56 (NK) cells.

CD4 and CD19 percentage were significantly decrease in comparison with healthy control. Conclusion : Acute infectious mononucleosis is characterized by a marked increase in the percentage of CD3 and CD8 T- cells with a slight increase in CD56 percentage.

A marked decrease in CD19 percentage and CD4 / CD8 ratio was noticed.