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When indirect hemagglutination, indirect immunofluorescence and enzyme-linked immunosorbent assay are used together for serologically diagnosing Chagas disease, results that are considered discordant sometimes occur because there is disagreement between what these tests indicate. The availability of the chemiluminescent ELISA method enabled tests on 200 serum samples that had previously produced discordant results from the three above-mentioned methods. CL-ELISA revealed that 193 of these samples were negative and seven were positive. The use of this new procedure provides further support for understanding this subject, but more concrete advances will depend on documentation with blood analyses from people previously demonstrated to be unquestionably infected or uninfected with Trypanosoma cruzi.

revista da sociedade brasileira de medicina tropical

Comportamento do método quimioluminescente-ELISA em relação a resultados considerados discordantes por meio de três técnicas convencionais para diagnóstico da doença de Chagas