Article ; Online: Characterization of Serum Samples With Discordant Results in 2 Herpes Simplex Virus Type 2 IgG Assays.
2022 Volume 49, Issue 5, Page(s) 353–359
Abstract: Background: Our laboratory system tests sera for herpes simplex virus type 2 (HSV-2) IgG using the DiaSorin Liaison chemiluminescent immunoassay (CIA), with the option to confirm positive samples by a laboratory-developed HerpeSelect inhibition assay. ... ...
Abstract | Background: Our laboratory system tests sera for herpes simplex virus type 2 (HSV-2) IgG using the DiaSorin Liaison chemiluminescent immunoassay (CIA), with the option to confirm positive samples by a laboratory-developed HerpeSelect inhibition assay. As part of the confirmation process, the HerpeSelect HSV-2 IgG enzyme immunoassay (EIA) is performed. This study investigated the relationship between DiaSorin HSV-2 IgG CIA-positive indices and HerpeSelect HSV-2 IgG EIA results. Methods: HerpeSelect HSV-2 IgG EIA results were compiled for a cohort of consecutive DiaSorin HSV-2 IgG CIA-positive (index ≥1.10) samples. To further characterize DiaSorin CIA-positive samples that were positive (concordant) or negative (discordant) by the HerpeSelect EIA, a separate composite reference study panel was constructed and also tested using the Biokit HSV-2 IgG assay and an HSV-2 IgG inhibition assay developed for the DiaSorin instrument. Samples were classified as DiaSorin HSV-2 IgG true positive or false positive based on a composite reference using HerpeSelect EIA, Biokit, and DiaSorin inhibition results. Results: Of 2305 consecutive DiaSorin HSV-2 IgG CIA-positive samples, 411 (17.8%) were HerpeSelect HSV-2 IgG EIA negative; 343 of 411 (83%) had DiaSorin indices of 1.10 to 3.00. For the composite reference study panel (N = 120), 59 of 60 discordant samples were classified as DiaSorin HSV-2 IgG false positive based on the composite reference, whereas 58 of 60 concordant samples were classified as true positive. Conclusions: Nearly all DiaSorin HSV-2 IgG CIA-positive but HerpeSelect HSV-2 IgG EIA-negative sera are falsely positive in the DiaSorin CIA. Furthermore, most DiaSorin false-positive samples exhibit low-positive indices, suggesting that guidelines for confirmatory testing should include low-positive samples by CIA and EIA. |
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MeSH term(s) | Antibodies, Viral ; Enzyme-Linked Immunosorbent Assay/methods ; Female ; Herpes Genitalis/diagnosis ; Herpes Simplex/diagnosis ; Herpesvirus 2, Human ; Humans ; Immunoglobulin G ; Male ; Sensitivity and Specificity |
Chemical Substances | Antibodies, Viral ; Immunoglobulin G |
Language | English |
Publishing date | 2022-01-24 |
Publishing country | United States |
Document type | Journal Article |
ZDB-ID | 435191-5 |
ISSN | 1537-4521 ; 0148-5717 |
ISSN (online) | 1537-4521 |
ISSN | 0148-5717 |
DOI | 10.1097/OLQ.0000000000001603 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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