Comparison of Standard and Point-of-Care CD4+ T Lymphocyte Measurement Methods in HIV-1 Infected Turkish Patients

Area of Science:

• Immunology
• Infectious Diseases
• Medical Diagnostics

Background:

• CD4+ T lymphocytes are crucial targets of HIV infection and key indicators of immune status.
• Monitoring CD4+ T lymphocyte counts is vital for assessing immune competence and predicting treatment success in HIV management.
• Standard flow cytometry is the established method for CD4+ T lymphocyte enumeration, but its accessibility can be limited.

Purpose of the Study:

• To compare the cost, effectiveness, reliability, and time efficiency of point-of-care (POC) CD4+ T lymphocyte testing against standard flow cytometry.
• To evaluate the utility of POC CD4+ T lymphocyte testing for disease management in HIV-infected individuals.

Main Methods:

• A study involving 113 patients to compare CD4+ T lymphocyte count and percentage using both standard flow cytometry and a POC method.
• Hemoglobin (Hb) levels were also assessed and compared between the two methods.
• Statistical analysis using intraclass correlation coefficients (ICC) to determine consistency between methods.

Main Results:

• Good consistency was observed between the two methods for Hb levels (ICC = 0.849) and CD4+ T lymphocyte percentage (ICC = 0.803).
• Moderate but statistically significant consistency was found for CD4+ T lymphocyte count (ICC = 0.651, p < 0.001).
• POC testing demonstrated good agreement with the standard flow cytometry method.

Conclusions:

• Point-of-care CD4+ T lymphocyte monitoring is a viable alternative to standard flow cytometry, particularly in resource-limited settings where cost and accessibility are concerns.
• The POC method is cost-effective, easy to use, and provides rapid results, making it suitable for predicting HIV treatment success.
• While virological monitoring (HIV RNA) is expensive, CD4+ T lymphocyte monitoring using POC devices offers a practical approach to patient management.