An interesting case of isolated false-negative hepatitis B surface antigen in a blood donor.
Vox Sang
; 2023 Dec 29.
Article
en En
| MEDLINE
| ID: mdl-38157225
ABSTRACT
BACKGROUND AND OBJECTIVES:
An important requirement for a hepatitis B surface antigen (HBsAg) screening assay is reliable detection of HBsAg mutant forms, especially in blood donation. Here we investigate and describe the case of an isolated false-negative result of commercial serology HBsAg screening assay of a blood donor. MATERIALS ANDMETHODS:
The current donation was routinely tested for HBsAg and hepatitis B virus (HBV) DNA in the mini-pool mode nucleic acid testing (MP-NAT of six samples), and further evaluated by individual donation ID-NAT. Finally, it was quantified and sequenced. All previous donations were found to have negative HBsAg and HBV DNA, as also the subsequent sample taken 3 months after the marked donation.RESULTS:
The current donation of the 53-year-old unvaccinated female with 14 previous donations was initially HBsAg negative and HBV DNA (MP-NAT) positive. Further testing showed HBsAg positive using other HBV serological assays, antibodies to HBV core antigen immunoglobulin M positive and HBV DNA ID-NAT positive, and contained 200 IU/mL of HBV DNA. The implicated donation carried genotype D strains, subtype ayw2 (F83S, V96A, V190A, L193S, I195T, L213S, F220L). The mutations in three positions, namely amino acids T118A, P120T, and P127T, were proven subsequently.CONCLUSION:
This unique mutation combination near the target epitope of one of the immunoassay monoclonals is a possible cause of the reduced analytical sensitivity of the serology assay.
Texto completo:
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Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Vox Sang
Año:
2023
Tipo del documento:
Article
Pais de publicación:
Reino Unido