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A Restriction Enzyme Based Cloning Method to Assess the In vitro Replication Capacity of HIV-1 Subtype C Gag-MJ4 Chimeric Viruses

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Group O human immunodeficiency virus-1 infections

H W Jaffe¹, G Schochetman

¹Division of AIDS, STD, and TB Laboratory Research, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.

Infectious Disease Clinics of North America

|March 12, 1998

Summary

Genetic diversity in human immunodeficiency viruses (HIV) poses diagnostic challenges. Group O HIV-1 strains, distinct from common group M, may evade standard tests, impacting AIDS diagnosis and blood safety.

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Area of Science:

Virology
Immunology
Public Health

Background:

Human immunodeficiency viruses (HIV), the causative agents of AIDS, exhibit significant genetic diversity.
HIV-1 encompasses major (group M) subtypes and genetically divergent group O viruses.
Group O HIV-1 is primarily found in Africa but has been reported globally, and is linked to AIDS.

Purpose of the Study:

To highlight the diagnostic challenges posed by genetically divergent Group O HIV-1.
To underscore the potential unreliability of standard HIV-1 group M diagnostic tests for Group O infections.
To emphasize the need for test modifications to ensure blood supply safety.

Main Methods:

Comparative analysis of HIV-1 genetic diversity, focusing on Group M and Group O subtypes.
Evaluation of diagnostic test performance for Group O HIV-1 detection.
Assessment of implications for blood screening and public health.

Main Results:

Group O HIV-1 viruses are highly divergent from Group M strains.
Existing diagnostic tests optimized for Group M may yield false-negative or unreliable results for Group O infections.
The prevalence of Group O, though regional, necessitates broader diagnostic considerations.

Conclusions:

The genetic divergence of Group O HIV-1 presents a significant challenge for current diagnostic assays.
Modifications to existing HIV detection tests are crucial to accurately diagnose Group O infections.
Ensuring the reliability of diagnostic tests is essential for safeguarding the blood supply and managing the AIDS epidemic.