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Clin Microbiol Infect. 2017 Mar 10. pii: S1198-743X(17)30152-0. doi: 10.1016/j.cmi.2017.03.003. [Epub ahead of print]
Serum Hepatitis B core-related antigen is more accurate than HBsAg to identify inactive carriers, regardless of HBV genotype.Riveiro-Barciela M1, Bes M2, Rodríguez-Frías F3, Tabernero D3, Ruiz A3, Casillas R4, Vidal J5, Homs M3, Nieto L6, Sauleda S2, Esteban R7, Buti M7.
Author information
1Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain. Electronic address: [email protected].2Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Transfusion Safety Laboratory, Banc de Sang i Teixits, Servei Català de la Salut, Barcelona, Spain.3Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain; Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain.4Vall d'Hebron Institut de Recerca, Barcelona, Spain.5Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain.6Liver Pathology Unit, Departments of Biochemistry and Microbiology (Virology Unit) Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain.7Liver Unit, Department of Internal Medicine, Hospital Universitari Vall d'Hebron and Universitat Autònoma de Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain.
AbstractOBJECTIVES: to investigate whether hepatitis B surface antigen (HBsAg) and hepatitis B core-related antigen (HBcrAg) levels are useful to identify inactive carriers among HBeAg-negative patients infected by different HBV genotypes.
METHODS: 202 consecutive HBeAg-negative chronic hepatitis B patients, 135 inactive carriers and 67 with HBV activity, were prospectively followed during 1 year.
RESULTS: In HBeAg-negative patients, HBsAg levels differed across the different genotypes (p<0.001). The highest levels were observed in genotypes F or H (4.2±0.6 logIU/mL), followed by genotype E (3.4±1.1 logIU/mL), A (3.4±0.8 logIU/mL), and the lowest in genotype D (2.7±1.1 logIU/mL). Variations in HBsAg levels were similar in inactive carriers and patients with HBV activity. HBsAg <3 logIU/mL showed good performance for identifying genotype-D inactive carriers: 76% of genotype D inactive carriers met this cut-off versus ≤31% for genotypes A, E, F or H. However, in patients with genotype A, HBsAg levels ≤3.7 logIU/mL better classified inactive carriers. The combination of a single measurement of HBcrAg ≤3 logU/mL plus HBV DNA ≤2000 IU/mL yielded a positive predictive value and diagnostic accuracy >85% in all HBV genotypes, except genotype H or F, with values of 62.5% and 72.7%, respectively, for the two parameters.
CONCLUSIONS: HBsAg levels varied across genotypes in HBeAg-negative patients. HBsAg levels <3 log IU/mL were only useful for identifying genotype D inactive carriers. A single HBcrAg measurement ≤3 logU/mL plus HBV DNA ≤2000 IU/mL was highly accurate for identifying inactive carriers, regardless of their HBV genotype.
Copyright © 2017 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.
KEYWORDS: HBV genotype; HBV inactive carrier; HBcrAg; HBeAg negative chronic hepatitis B; HBsAg; Hepatitis B
PMID:28288829DOI:10.1016/j.cmi.2017.03.003
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