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Polymerase chain reaction testing for early detection of HIV infection in children
1Division of Pediatric Infectious Diseases and Immunology, University of Florida Health Science Center, Jacksonville, USA.
Insights
The polymerase chain reaction (PCR) test aids in the early diagnosis of vertically transmitted human immunodeficiency virus (HIV) infection. This sensitive test can identify HIV in infants, overcoming challenges posed by maternal antibodies.
Area of Science:
- Pediatrics
- Infectious Diseases
- Virology
Background:
- Diagnosing vertically acquired human immunodeficiency virus (HIV) infection in infants is challenging due to transplacentally acquired maternal antibodies.
- Early detection of HIV is crucial for timely intervention and improved outcomes in infants.
Purpose of the Study:
- To evaluate the utility of polymerase chain reaction (PCR) testing for the early diagnosis of perinatally acquired HIV infection.
- To assess the effectiveness of PCR in identifying HIV in infants from birth through the first few months of life.
Main Methods:
- Retrospective review of medical records for 50 children in the Northeast Florida Pediatric AIDS Program who underwent PCR testing.
- Analysis of PCR test results at different age points, from birth up to 4 months of age.
Main Results:
- PCR testing demonstrated increasing positivity rates with age: 62% at birth, 78% by 2 months, and 85% by 4 months.
- The PCR test showed high sensitivity and specificity in identifying HIV infection in infants.
- Early PCR testing can overcome diagnostic difficulties caused by maternal antibodies.
Conclusions:
- Polymerase chain reaction (PCR) testing is a valuable tool for the early and accurate diagnosis of vertically transmitted HIV infection in infants.
- Implementing early PCR testing can facilitate prompt management of HIV-infected newborns.
Abstract:
Diagnosis of vertically acquired human immunodeficiency virus (HIV) infection is often difficult because of transplacentally acquired maternal antibodies. The polymerase chain reaction (PCR) test is commercially available and has high sensitivity and specificity. To evaluate the usefulness of PCR testing in the early diagnosis of perinatally acquired HIV infection, we reviewed records of 122 children having follow-up in the Northeast Florida Pediatric AIDS Program. Seventy-two children were excluded for various reasons. Of the remaining 50 children, 37 had PCR testing. In 5 children, the initial PCR test was done at > 18 months of age. Results of PCR testing were positive in 8 of 13 (62%) at birth, 12 of 18 (67%) by 1 month of age, 18 of 23 (78%) by 2 months of age, and 20 of 24 (83%) by 3 months of age. In 24 of 27 (85%), results were positive by the time the children reached 4 months of age. Our data suggest that the PCR test is a useful tool for early diagnosis of vertically transmitted HIV infection.