Immunoblot analysis for serodiagnosis of tuberculosis using a 45/47-kilodalton antigen complex of Mycobacterium tuberculosis.
Clin Diagn Lab Immunol
; 4(3): 334-8, 1997 May.
Article
em En
| MEDLINE
| ID: mdl-9144373
ABSTRACT
We evaluated the immunoglobulin G (IgG) antibody response to the 45/47-kDa secreted protein of Mycobacterium tuberculosis by immunoblot assay, to assess its potential value for serological diagnosis. Control subjects consisted of healthy volunteers with negative or positive tuberculin skin tests. Most (>98%) scored negative in an immunoblot test when the sera were analyzed at a 1400 dilution. Approximately 40% of sera (diluted 1 in 400) from tuberculous patients (positive smears) recognized the antigen complex. The sensitivity of the test for patients suffering from extrapulmonary tuberculosis was similar to that for patients suffering from pulmonary tuberculosis but who had negative smears. The frequency of positive reactions among the patients suffering from other pulmonary diseases was similar to that among the control subjects. In tuberculous patients infected with human immunodeficiency virus, the sensitivity of the immunoblot test was significantly lower. Thus, this test based on an antigen complex used in an immunoblot assay to detect the presence of IgG antibody has a specificity of 98% and a sensitivity of 40%. The simultaneous use of different purified antigens, selected at the same high specificity level, may improve the sensitivity of such an assay.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
/
3_ND
Base de dados:
MEDLINE
Assunto principal:
Tuberculose
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Tuberculose Pulmonar
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Testes Sorológicos
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Immunoblotting
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Mycobacterium tuberculosis
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Antígenos de Bactérias
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
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Observational_studies
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Risk_factors_studies
Limite:
Humans
Idioma:
En
Revista:
Clin Diagn Lab Immunol
Ano de publicação:
1997
Tipo de documento:
Article