Sero-diagnosis of tuberculosis with A60 antigen enzyme-linked immunosorbent assay: failure in HIV-infected individuals in Ghana
Identifieur interne : 001599 ( Main/Merge ); précédent : 001598; suivant : 001600Sero-diagnosis of tuberculosis with A60 antigen enzyme-linked immunosorbent assay: failure in HIV-infected individuals in Ghana
Auteurs : T. S. Van Der Werf [Ghana, Pays-Bas] ; P. K. Das [Pays-Bas] ; D. Van Soolingen [Pays-Bas] ; S. Yong [Pays-Bas] ; T. W. Van Der Mark [Pays-Bas] ; R. Van Den Akker [Pays-Bas]Source :
- Medical Microbiology and Immunology [ 0300-8584 ] ; 1992-05-01.
Descripteurs français
- Wicri :
- geographic : Ghana.
- topic : Protection de l'environnement, Santé publique.
English descriptors
- KwdEn :
- Agogo, Agogo hospital, Anda biologicals, Assay, Cocito, Control subjects, Diagnostic kits, Diagnostic usefulness, Dutch patients, Elisa, Environmental protection, Enzyme immunoassay, Forest area, Ghana, Ghanaian, Ghanaian controls, Healthy controls, Higher levels, Humoral, Immunol, Immunosorbent, Immunosorbent assay, Median, Microbiol immunol, Mycobacterial, Mycobacterial antigen, Mycobacterium boris, National institute, Other mycobacterial diseases, Public health, Serological test, Serum antibody assay, Test results, Tuberculosis.
- Teeft :
- Agogo, Agogo hospital, Anda biologicals, Assay, Cocito, Control subjects, Diagnostic kits, Diagnostic usefulness, Dutch patients, Elisa, Environmental protection, Enzyme immunoassay, Forest area, Ghana, Ghanaian, Ghanaian controls, Healthy controls, Higher levels, Humoral, Immunol, Immunosorbent, Immunosorbent assay, Median, Microbiol immunol, Mycobacterial, Mycobacterial antigen, Mycobacterium boris, National institute, Other mycobacterial diseases, Public health, Serological test, Serum antibody assay, Test results, Tuberculosis.
Abstract
Abstract: In order to assess the diagnostic usefulness of the A60 (ANDA Biologicals, Strassbourg, France) sero-diagnostic enzyme-linked immunosorbent assay (ELISA) kit for tuberculosis in Africa, sera of 53 pulmonary smear-positive tuberculosis (TB) patients, 30 apparently healthy control subjects and 6 AIDS suspects were sampled in Agogo Hospital in the forest area of Ghana. These sera were analyzed for antibodies to HIV-1 and HIV-2, and IgG-antibodies to the A60 BCG-antigen, while the non-HIV individuals were tested for total IgG levels. One healthy control subject, all of 6 AIDS suspects and 7 of the TB patients has HIV infections. In the non-HIV TB group, the sensitivity and specifity of the A60 ELISA was 78% and 86%, respectively, which was much poorer than expected from published reports about the A60 test. The A60 test failed, completely however, to discriminate between TB and non-TB in the HIV-positive group. In the non-HIV groups, total IgG levels were significantly higher in TB patients than in controls. It seems that the usefulness of the A60 ELISA test to diagnose tuberculosis is very limited in this high-incidence area, and that it seems to be of no value in patients infected with HIV.
Url:
DOI: 10.1007/BF00189425
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<term>Diagnostic kits</term>
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<front><div type="abstract" xml:lang="en">Abstract: In order to assess the diagnostic usefulness of the A60 (ANDA Biologicals, Strassbourg, France) sero-diagnostic enzyme-linked immunosorbent assay (ELISA) kit for tuberculosis in Africa, sera of 53 pulmonary smear-positive tuberculosis (TB) patients, 30 apparently healthy control subjects and 6 AIDS suspects were sampled in Agogo Hospital in the forest area of Ghana. These sera were analyzed for antibodies to HIV-1 and HIV-2, and IgG-antibodies to the A60 BCG-antigen, while the non-HIV individuals were tested for total IgG levels. One healthy control subject, all of 6 AIDS suspects and 7 of the TB patients has HIV infections. In the non-HIV TB group, the sensitivity and specifity of the A60 ELISA was 78% and 86%, respectively, which was much poorer than expected from published reports about the A60 test. The A60 test failed, completely however, to discriminate between TB and non-TB in the HIV-positive group. In the non-HIV groups, total IgG levels were significantly higher in TB patients than in controls. It seems that the usefulness of the A60 ELISA test to diagnose tuberculosis is very limited in this high-incidence area, and that it seems to be of no value in patients infected with HIV.</div>
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