Discrepant HIV results resolved by human DNA testing.

Area of Science:

• Clinical diagnostics
• Infectious disease research
• Laboratory quality control

Background:

• Accurate HIV testing is critical for patient management and public health.
• Initial screening tests can sometimes yield false positive results requiring confirmatory testing.
• Understanding sources of laboratory error is essential for maintaining testing integrity.

Observation:

• A high-risk patient received a positive HIV antibody/antigen test result.
• Follow-up testing for HIV RNA and antibodies 2-3 months later yielded negative results.
• Human DNA analysis confirmed all collected samples belonged to the same patient.

Findings:

• The initial positive HIV test result was determined to be a false positive.
• Laboratory investigations identified a probable splash-over contamination as the cause of the false positive result.
• This highlights the potential for pre-analytical errors in diagnostic testing.

Implications:

• Reinforces the importance of confirmatory testing protocols in HIV diagnosis.
• Underscores the need for stringent laboratory quality control measures to prevent contamination.
• Emphasizes the impact of laboratory errors on patient anxiety and clinical decision-making.