Patterns of hepatitis B virus infection in Brazilian human immunodeficiency virus infected patients: high prevalence of occult infection and low frequency of lamivudine resistant mutations
Mem. Inst. Oswaldo Cruz
;
101(6): 655-660, Sept. 2006. tab
Artigo
em Inglês
| LILACS
| ID: lil-437060
ABSTRACT
Hepatitis B virus (HBV) molecular profiles were determined for 44 patients who were infected with human immunodeficiency virus (HIV) type 1 and had antibodies to the hepatitis B core antigen (anti-HBc), with and without other HBV serological markers. In this population, 70 percent of the patients were under lamivudine treatment as a component of antiretroviral therapy. HBV DNA was detected in 14 (32 percent) patients. Eight out of 12 (67 percent) HBsAg positive samples, 3/10 (30 percent) anti-HBc only samples, and 3/22 (14 percent) anti-HBs positive samples were HBV DNA positive. HBV DNA loads, measured by real time polymerase chain reaction, were much higher in the HBsAg positive patients (mean, 2.5 Î 10(9) copies/ml) than in the negative ones (HBV occult infection; mean, 2.7 Î 10(5) copies/ml). Nine out of the 14 HBV DNA positive patients were under lamivudine treatment. Lamivudine resistant mutations in the polymerase gene were detected in only three patients, all of them belonging to the subgroup of five HBsAg positive, HBV DNA positive patients. A low mean HBV load (2.7 Î 10(5) copies/ml) and an absence of lamivudine resistant mutations were observed among the cases of HBV occult infection.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Infecções por HIV
/
Vírus da Hepatite B
/
HIV-1
/
Lamivudina
/
Fármacos Anti-HIV
/
Hepatite B
Tipo de estudo:
Estudo de etiologia
/
Estudo de prevalência
/
Fatores de risco
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2006
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Fundação Oswaldo Cruz/BR
/
Hospital Universitário Gaffrée e Guinle/BR
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