Molecular and serological characterization of occult hepatitis B among blood donors in Maputo, Mozambique
Mem. Inst. Oswaldo Cruz
; 115: e200006, 2020. tab, graf
Article
em En
| LILACS, SES-SP
| ID: biblio-1135222
Biblioteca responsável:
BR1.1
ABSTRACT
BACKGROUND Occult hepatitis B virus (HBV) - characterized by the absence of detectable HBsAg in the presence of HBV DNA - represents a potential threat for blood safety. OBJECTIVES This study was conducted with the aim to investigate the serological and molecular characterization of occult HBV infection (OBI) among blood donors in Mozambique. METHODS 1,502 blood donors were tested for HBsAg. All HBsAg-negative individuals were tested for HBV DNA. Antibodies against HBV core, surface and HBe antigen (anti-HBc, anti-HBs, HBeAg) were measured in HBV DNA positive individuals. FINDINGS 1435 serum samples were HBsAg negative and 16 positive for HBV DNA, 14 confirmed to have OBI, corresponding to a frequency of 0.98%. Of the 14 OBI infections identified, 13/14 (92.8%) were positive for anti-HBc, 4/14 (28.5%) for anti-HBs, and no samples were reactive for HBeAg. Of the 14 OBI cases, nine samples (64.2%) were sequenced for the S/P region. Eight samples (88.9%) belonged to genotype A1 and one (11.1%) to genotype E. One escape mutation (T123A) associated with OBI and various amino acid substitutions for genotype A1 and E were observed. MAIN CONCLUSIONS Our results show the importance of using nucleic acid amplification test to detect occult hepatitis B infection in blood donors in Mozambique.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
/
SES-SP
Assunto principal:
Doadores de Sangue
/
Vírus da Hepatite B
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Técnicas de Amplificação de Ácido Nucleico
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Hepatite B
/
Antígenos de Superfície da Hepatite B
Tipo de estudo:
Observational_studies
/
Prevalence_studies
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Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
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Female
/
Humans
/
Male
País/Região como assunto:
Africa
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
MEDICINA TROPICAL
/
PARASITOLOGIA
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Brasil
/
Moçambique
/
Estados Unidos
País de publicação:
Brasil