Summary auto-generated
This study compared PCR and tissue culture methods for detecting Epstein-Barr virus (EBV) in clinical samples from healthy donors and immunocompromised transplant recipients. Researchers tested peripheral blood mononuclear cells and throat wash samples using conventional immortalization assays and PCR amplification targeting the EBNA 2 gene. PCR detected EBV significantly more frequently than tissue culture in all sample types, with detection rates increasing substantially in throat wash cell pellets compared to filtered supernatants. In healthy donors, PCR detected EBV in 52% of blood samples and 59% of throat wash cell pellets, compared to 41% and 14% respectively by tissue culture. In transplant patients, PCR detected virus in 79% of blood samples and 81% of throat wash cell pellets versus 47% and 24% by culture. All samples positive by biological assays were also PCR-positive. The findings demonstrate that PCR is a rapid, sensitive alternative to time-consuming tissue culture methods for EBV detection, though it cannot differentiate between biologically active and inactive virus.
Key findings
- PCR amplification detected EBV significantly more frequently than tissue culture methods across all sample types tested (P<0.01 to P<0.000001)
- EBV was detected in 79% of blood samples and 81% of throat wash cell pellets from transplant recipients by PCR compared to 47% and 81% by tissue culture, respectively
- Throat wash cell pellets yielded significantly higher EBV detection rates than filtered supernatant fluid, reflecting EBV's cell-associated nature (P<0.02 in transplant patients)
- All samples positive by conventional immunalization assays were also positive by PCR, confirming PCR sensitivity
- No correlation existed between EBV detection in throat wash and peripheral blood from the same individual
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Abstract
In this study we have compared the use of PCR and conventional tissue culture methods to detect Epstein-Barr virus (EBV) in peripheral blood mononuclear cells and throat wash samples. The study population included 29 healthy adult and 20 immunocompromised EBV-seropositive donors. The results show significantly higher EBV detection rates by PCR than the tissue culture methods in throat wash samples from both donor groups (P < 0.01 in healthy donors and P < 0.009 in the immunocompromised donors) and in peripheral blood from the immunocompromised but not from the healthy donors (P < 0.008). Furthermore, when EBV DNA detection rates in throat wash cell pellet and supernatant fluid were compared, a higher positive result was obtained with the cell pellets which reached statistical significance in the immunocompromised group (P < 0.02). No correlation was found between positivity in throat wash and peripheral blood from the same donors.