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  • Title: Enzyme-linked immunosorbent assay for leptospirosis immunoglobulin M specific antibody using surface antigen from a pathogenic Leptospira: a comparison with indirect hemagglutination and microagglutination tests.
    Author: Petchclai B, Hiranras S, Kunakorn M, Potha U, Liemsuwan C.
    Journal: J Med Assoc Thai; 1992 Jan; 75 Suppl 1():203-8. PubMed ID: 1402466.
    Abstract:
    A search for a sensitive and specific test for human leptospirosis was made by enzyme-linked immunosorbent assay for immunoglobulin M specific antibody (IgM ELISA) using a surface antigen from L.interrogans serovar bataviae, L. interrogans serovar pyrogenes and L.interogans serovar icterohaemorrhagiae. The IgM ELISA tests using each of the three antigens were evaluated in 103 sera primarily positive by microagglutination test (MA). Optical density of these IgM ELISA tests showed good correlation. The IgM ELISA using antigen from serovar bataviae was compared with MA and indirect hemagglutination (IHA) in 20 sera primarily positive by IHA, and 103 sera primarily positive by MA. IgM ELISA and IHA using antigen prepared from serovar bataviae in 103 sera positive for MA had a sensitivity of 98.06 and 92.23 per cent respectively. In 20 sera primarily positive by IHA, IgM ELISA and MA showed sensitivity of 80 and 45 per cent respectively. The surface antigen used in IgM ELISA is broadly specific making IgM ELISA a sensitive and specific test for human leptospirosis. IHA agreed more with IgM ELISA in comparison to MA. As MA is not sensitive for early infection, IHA and IgM ELISA should be in routine use in general laboratories.
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