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Latex agglutination assay of human immunoglobulin M antitoxoplasma antibodies which uses enzymatically treated antigen-coated particles.
- Source :
-
Journal of clinical microbiology [J Clin Microbiol] 1992 Apr; Vol. 30 (4), pp. 882-8. - Publication Year :
- 1992
-
Abstract
- An assay of immunoglobulin M (IgM) antitoxoplasma antibodies which is rapid (less than 30 min), homogeneous, and reliable (interassay coefficient of variation, less than 11%) is proposed. Its principle is based on the observation that a suspension of latex particles coated with toxoplasma antigens, after treatment with proteinase K, becomes less agglutinable by IgG antibodies but more agglutinable by IgM antibodies. The difference between the activities of the two classes of antibodies is increased by the addition of a monoclonal antibody directed against the Fc region of IgM. Agglutination is measured with a special instrument which optically counts the particles that remain free after the reaction. Turbidimetric reading, although less sensitive, is also suitable. No significant interferences either by IgG antitoxoplasma antibodies or by rheumatoid factor or antinuclear antibodies were observed. The sensitivity was similar to that of the immunosorbent agglutination assay.
- Subjects :
- Animals
Antigens, Protozoan
Endopeptidase K
Evaluation Studies as Topic
Humans
Latex Fixation Tests statistics & numerical data
Reproducibility of Results
Sensitivity and Specificity
Serine Endopeptidases
Antibodies, Protozoan analysis
Immunoglobulin M analysis
Latex Fixation Tests methods
Toxoplasma immunology
Subjects
Details
- Language :
- English
- ISSN :
- 0095-1137
- Volume :
- 30
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Journal of clinical microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 1572975
- Full Text :
- https://doi.org/10.1128/jcm.30.4.882-888.1992