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Lymphocyte transformation test: The multiple positive results turned to all negative after influenza infection
Makoto Kondo1, Shohei Iida1, Ai Umaoka1
1Department of Dermatology Mie University Graduate School of Medicine Tsu Japan.
Insights
Previously positive lymphocyte transformation test (LTT) results can become negative during influenza infection. Timing of LTT is crucial, as infection may influence test outcomes.
Area of Science:
- Immunology
- Infectious Diseases
Background:
- The lymphocyte transformation test (LTT) is a diagnostic tool used to assess cell-mediated immunity.
- Understanding factors that influence LTT results is critical for accurate interpretation.
Observation:
- A notable change from positive to negative LTT results was observed in individuals concurrently experiencing influenza infection.
- This suggests a potential suppressive effect of influenza on lymphocyte responsiveness.
Findings:
- Influenza infection can alter the immunological status, leading to a false-negative LTT result.
- The dynamic interplay between viral infections and immune assays requires careful consideration.
Implications:
- Clinicians should be aware that concurrent infections, such as influenza, can impact LTT outcomes.
- Consideration of the patient's infection status and the timing of LTT are essential for reliable diagnostic interpretation.
Abstract:
Previously positive lymphocyte transformation test (LTT) results changed to negative during influenza infection. As observed in the current article, results of LTT may be influenced by infection; therefore, it is crucial to consider the timing of LTT.

