Evaluation of capture ELISA and rapid immunochromatographic test for the determination of IgM and IgG antibodies produced during dengue infection
1998; Elsevier BV; Volume: 10; Issue: 1 Linguagem: Inglês
10.1016/s0928-0197(98)00002-6
ISSN1873-4901
Autores Tópico(s)Malaria Research and Control
ResumoBackground: Rapid diagnosis of dengue infection is essential to patient management and disease control. The development of a rapid (5 min) immunochromatographic test and a 2 h commercial capture enzyme linked immunosorbent assay (ELISA) for anti-dengue IgM and IgG antibodies may lead to more rapid and accurate testing in peripheral health settings and diagnostic laboratories. Objectives: Evaluate two new commercial tests for dengue serology (Dengue Rapid test and Dengue Duo ELISA; PanBio, Brisbane, Australia). Study design: The sensitivity and specificity of the tests were compared with in-house dengue IgM ELISA and hemagglutination-inhibition (HAI) assays using known positive and negative dengue specimens, as well as specimens from non-dengue cases. Results: Both assays showed excellent sensitivity in the diagnosis of both primary and secondary dengue infection (100%). In both assays, IgG levels showed excellent correlation with hemagglutination-inhibition (HAI) assay, and these could be used to distinguish between primary and secondary dengue infections (92 and 97% of patients correctly classified in the rapid test and Duo ELISA, respectively). Specificity in both assays was 89% when sera from patients, with no apparent dengue infection, typhoid, leptospirosis and malaria, were tested. Conclusions: These tests should be a useful aid in confirming the clinical diagnosis of dengue infection. The rapid test will be particularly valuable in peripheral health settings, while the ELISA has a place in central testing laboratories.
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