Evolving complexities of infant HIV diagnosis within Prevention of Mother-to-Child Transmission programs

Area of Science:

• Pediatric Infectious Diseases
• Diagnostic Immunology
• Public Health

Background:

• Early diagnosis of HIV in infants and children is vital for effective antiretroviral therapy, preventing severe illness and mortality.
• Despite improved diagnostic tests, challenges in achieving early definitive HIV diagnosis in infants are increasing.
• Advances in prevention of mother-to-child transmission (PMTCT) programs, while effective, complicate infant HIV diagnosis.

Purpose of the Study:

• To examine the diagnostic challenges in early infant HIV diagnosis.
• To analyze the impact of PMTCT on HIV polymerase chain reaction (PCR) results.
• To address the declining positive predictive value of early infant diagnosis (EID) assays.

Main Methods:

• Review of current infant HIV diagnostic testing protocols.
• Analysis of factors influencing HIV polymerase chain reaction (PCR) results in infants.
• Evaluation of the impact of antiretroviral drug exposure on diagnostic accuracy.

Main Results:

• Infants exposed to antiretroviral drugs may show virological suppression, leading to false-negative HIV PCR results.
• Increased effectiveness of PMTCT programs reduces the transmission rate but lowers the positive predictive value of EID assays.
• Both false-negative and false-positive HIV PCR results are becoming more common, complicating diagnosis.

Conclusions:

• Current infant HIV diagnostic strategies face increasing complexity due to successful PMTCT interventions.
• False-negative and false-positive results can occur, necessitating careful interpretation of HIV PCR and EID assay outcomes.
• Addressing these diagnostic hurdles is essential for managing the burden of HIV in infants, especially in high-prevalence settings.