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1.
Braz J Infect Dis ; 17(3): 369-74, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23602467

RESUMO

Hepatitis C virus infects over 15 million patients from India and 2.86 million from Brazil. Detection of anti-hepatitis C virus antibodies has limited sensitivity during acute phase: the pre-seroconversion window period. Hepatitis C virus-RNA detection techniques are used to overcome this shortfall, but are costly and unavailable widely in developing countries. Estimation of hepatitis C virus core-antigen, a protein with highly conserved sequence, by enzyme-immunoassays is an economic and simpler alternative to RNA detection. This study was conducted in Delhi, involving 300 acute and chronic liver disease patients, tested for anti-hepatitis C virus 3rd-generation ELISA, hepatitis C virus core-antigen-ELISA and hepatitis C virus-RNA reverse transcription-polymerase chain reaction. Among the acute patients, hepatitis C virus core-antigen assay could identify 13 out of 14 pre-seroconversion window period cases and 6 out of 8 seroconverted cases, with a pre-seroconversion window period sensitivity of 92.9% and specificity of 100%. In hepatitis C virus core-antigen-positive cases, the viral load was in the range of 4900 to 1.46×10(6)IU/mL, whereas in hepatitis C virus core-antigen-negative cases, the range of viral load was 100-4500IU/mL. The cost of the hepatitis C virus core-antigen-ELISA was estimated around 3-4 times lesser than the in-house reverse transcription-polymerase chain reaction and 9-10 times lesser than the United States Food and Drug Administration approved reverse transcription-polymerase chain reaction. With a good sensitivity and specificity in the acute phase of infection, hepatitis C virus core-antigen-ELISA can thus be a useful alternative in the developing nations.


Assuntos
Hepacivirus , Antígenos da Hepatite C/sangue , Hepatite C/diagnóstico , RNA Viral/sangue , Proteínas do Core Viral/sangue , Hepacivirus/genética , Hepacivirus/imunologia , Humanos , Índia , Valor Preditivo dos Testes , Reprodutibilidade dos Testes , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Sensibilidade e Especificidade , Carga Viral
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