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Related Experiment Videos

Diagnosing HIV-related disease: using the CD4 count as a guide

A C Jung1, D S Paauw

  • 1Department of Medicine, University of Washington, Seattle 98195-6420, USA.

Journal of General Internal Medicine
|March 21, 1998
PubMed
Summary

HIV patients face various disease risks based on CD4 counts. Lower CD4 counts, especially below 200/mm3 or 50/mm3, significantly increase susceptibility to opportunistic infections and specific HIV-related illnesses.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Virology

Background:

  • Human Immunodeficiency Virus (HIV) compromises the immune system, primarily affecting CD4+ T-lymphocyte counts.
  • Monitoring CD4 counts is crucial for assessing HIV disease progression and immune status.

Purpose of the Study:

  • To synthesize current knowledge on the correlation between CD4+ T-lymphocyte counts and the incidence of various HIV-associated diseases.
  • To stratify disease risks according to specific CD4+ T-lymphocyte count thresholds.

Main Methods:

  • A comprehensive literature review was conducted using MEDLINE.
  • Searches included English-language articles published between 1985 and 1996.
  • Keywords encompassed "CD4 lymphocyte count" and multiple HIV-related disease terms.

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Main Results:

  • Certain HIV-related conditions, such as sinusitis and Kaposi's sarcoma, occur irrespective of CD4 count.
  • A CD4 count below 200/mm³ elevates the risk of opportunistic infections like Pneumocystis pneumonia and toxoplasmosis.
  • CD4 counts below 50/mm³ are associated with severe conditions including cytomegalovirus retinitis and central nervous system lymphoma.

Conclusions:

  • CD4+ T-lymphocyte counts serve as a critical indicator for predicting specific HIV-related disease risks.
  • Risk stratification based on CD4 counts aids in clinical management and preventative strategies for HIV-infected individuals.
  • Understanding these thresholds is vital for timely intervention and improved patient outcomes in HIV care.