Key result
SPACH assay matches or exceeds commercial radioimmunoassay sensitivity and specificity for detecting HAV IgM antibodies.
Why the study?
A rapid, sensitive, and specific assay for detecting hepatitis A virus-specific IgM antibodies without hazardous substrates or radioactivity was needed.
Does the SPACH assay accurately detect HAV IgM antibodies compared to a commercial radioimmunoassay in sera from humans recently infected with hepatitis?
Does the SPACH assay accurately detect HAV IgM antibodies compared to a commercial radioimmunoassay in sera from humans recently infected with hepatitis?
The SPACH assay provides a rapid, non-hazardous alternative to radioimmunoassay for detecting HAV-specific IgM antibodies.
Answers are grounded in this paper and cite their sources.
SPACH assay may offer a safer alternative for HAV IgM detection; leaves open prospective validation before routine adoption.
A solid-phase antibody capture hemadsorption (SPACH) assay was developed to detect hepatitis A virus (HAV)-specific immunoglobulin M (IgM) antibodies in sera from humans recently infected with hepatitis. The assay is performed with microtiter plates coated with anti-human IgM antibodies to capture IgM antibodies from the test sera. HAV-specific IgM antibody is detected by the addition of HAV hemagglutinating antigen and goose erythrocytes. Hemadsorption of erythrocytes to antigen-antibody complexes attached to the solid phase indicate the presence of IgM antibodies. The SPACH assay was compared to a commercial radioimmunoassay and was found to be equally or more sensitive and specific for the detection of HAV IgM antibodies. The SPACH assay is an alternative, rapid assay that doesn't require hazardous substrates or radioactivity for the detection of HAV-specific antibodies.
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Summers et al. (1993) studied Hepatitis A virus infection. Solid-phase antibody capture hemadsorption (SPACH) assay vs. Commercial radioimmunoassay was evaluated on Detection of HAV IgM antibodies (sensitivity and specificity). The solid-phase antibody capture hemadsorption (SPACH) assay was equally or more sensitive and specific than a commercial radioimmunoassay for detecting HAV IgM antibodies.
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