A highly sensitive and specific chemiluminescent enzyme-linked immunosorbent assay for diagnosis of active Trypanosoma cruzi infection

A highly sensitive and specific chemiluminescent enzyme-linked immunosorbent assay for diagnosis of active Trypanosoma cruzi infection

Autor Almeida, I. C. Google Scholar
Covas, D. T. Google Scholar
Soussumi, LMT Google Scholar
Travassos, L. R. Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
RIBEIRAO PRETO FDN
Resumo BACKGROUND: Chagas' disease is transmitted to man either by the bite of insects harboring Trypanosoma cruzi or by the transfusion of blood from infected donors. the conventional serologic testing as presently used in blood banks in South America is unsatisfactory, because of a high number of inconclusive and false-positive results. Other methods such as polymerase chain reaction and enzyme-linked immunosorbent assay (ELISA) with recombinant antigens have been proposed, but inherent difficulties have so far precluded their adoption in the large-scale screening required by blood banks.STUDY DESIGN and METHODS: A highly sensitive and specific chemiluminescent ELISA using a purified trypomastigote glycoconjugate antigen and a complex epimastigote antigen was devised for the diagnosis of active T. cruzi infection. RESULTS: Chemiluminescent ELISA was 100-percent sensitive in the diagnosis of 100 cases of confirmed Chagas' disease. Inconclusive results and false-positive reactions were eliminated in a panel of 115 sera. the specificity of the chemiluminescent ELISA was 100 percent with a purified trypomastigote glycoconjugate antigen and 99.7 percent wiih a complex epimastigote antigen when applied to 1000 normal human sera and 288 heterologous sera from patients with other infections, including leishmaniasis, and vaccinated individuals.CONCLUSION: the chemiluminescent ELISAs provide a test that is highly sensitive (purified trypomastigote glycoconjugate and complex epimastigote antigens) and specific (purified trypomastigote glycoconjugate antigen) for Chagas' disease diagnosis. It can be used in blood bank screening and to monitor the treatment of patients undergoing chemotherapy.
Idioma Inglês
Data de publicação 1997-08-01
Publicado em Transfusion. Bethesda: Amer Assoc Blood Banks, v. 37, n. 8, p. 850-857, 1997.
ISSN 0041-1132 (Sherpa/Romeo, fator de impacto)
Publicador Amer Assoc Blood Banks
Extensão 850-857
Fonte http://dx.doi.org/10.1046/j.1537-2995.1997.37897424410.x
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:A1997XT16500014
Endereço permanente http://repositorio.unifesp.br/handle/11600/25774

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