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Competitive ELISA for detection of HHV-6 antibody: seroprevalence in a danish population
1Department of Virology, Statens Seruminstitut, Copenhagen S Denmark.
Insights
A new enzyme-linked immunosorbent assay (ELISA) for human herpesvirus 6 (HHV-6) is highly sensitive. This HHV-6 ELISA detected antibodies in 100% of children aged 3 and above, outperforming traditional methods.
Area of Science:
- Virology
- Immunology
- Infectious Diseases
Background:
- Human herpesvirus 6 (HHV-6) is a common viral infection.
- Accurate detection of HHV-6 antibodies is crucial for diagnosis and understanding infection dynamics.
- Existing diagnostic methods may have limitations in sensitivity.
Purpose of the Study:
- To develop and validate a competitive enzyme-linked immunosorbent assay (ELISA) for detecting HHV-6 antibodies.
- To evaluate the sensitivity and performance of the new ELISA compared to indirect immunofluorescence assay (IFA).
Main Methods:
- A competitive HHV-6 ELISA was developed using rabbit polyclonal antibodies and cellular antigen.
- 285 sera from Danish children (1-6 years) were screened for HHV-6 antibodies.
- The ELISA was compared against IFA using 83 serum samples from 65 patients (4 weeks - 72 years).
Main Results:
- The HHV-6 ELISA demonstrated high seropositivity rates in children, reaching 100% in those aged 3 years and older.
- The ELISA showed significantly higher sensitivity than IFA, detecting 100% of patient sera compared to IFA's 65%.
- The ELISA identified one seroconversion in an infant that IFA missed.
Conclusions:
- The developed competitive HHV-6 ELISA is a sensitive and reliable method for detecting HHV-6 antibodies.
- This assay offers improved diagnostic capabilities compared to IFA, particularly for early detection and seroconversion.
- The findings support the utility of this ELISA in epidemiological studies and clinical diagnostics for HHV-6 infections.
Abstract:
A competitive HHV-6 enzyme-linked immunosorbent assay (ELISA) was established, utilizing HHV-6 rabbit polyclonal antibodies and HHV-6 cellular antigen. In total, 285 sera from Danish children aged 1-6 years were screened for HHV-6 antibodies. The lowest seropositive rate, 78% was found in the youngest age group from 1 year to 15 months. All 120 (100%) children aged 3 years and above were seropositive. The ELISA was compared with indirect immunofluorescence assay (IFA) using a group of 83 serum samples from 65 Danish patients (aged 4 weeks to 72 years). All but one of the sera (100% of patients) were positive in the ELISA, but only 71% of sera (65% of patients) were positive with both assays. The ELISA detected one seroconversion in a baby, which was not detected by IFA. The ELISA was found to be more sensitive than IFA.