Biomaterial Database

A new whole-scolex complement-fixation test for hydatid disease. 1968

A Fischman

The sensitivity of indirect agglutination tests for the diagnosis of human hydatid disease, although high, is not sufficient. Furthermore, the general use of hydatid fluid as antigen is responsible for some false positive reactions. Scolex extracts have been shown to increase specificity, but less attention has been paid to whole-scolex antigens. The author describes a new whole-scolex complement-fixation test that, like other scolex tests, is more specific than tests using fluid antigen. Its sensitivity is at least equal to that of the hydatid fluid latex-agglutination test, and is higher than that of the fluorescent-antibody, the scolex extract latex, and the hydatid fluid complement-fixation tests.The new test is also of interest since particulate antigens are uncommon, compared with soluble antigens, in complement-fixation techniques.

UI	MeSH Term	Description	Entries
D008722	Methods	A series of steps taken in order to conduct research.	Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique
D003168	Complement Fixation Tests	Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by addition of a second antigen-antibody system such as red cells and appropriate red cell antibody (hemolysin) requiring complement for its completion (stage 2). Failure of the red cells to lyse indicates that a specific antigen-antibody reaction has taken place in stage 1. If red cells lyse, free complement is present indicating no antigen-antibody reaction occurred in stage 1.	Complement Absorption Test, Conglutinating,Conglutination Reaction,Conglutinating Complement Absorption Test,Complement Fixation Test,Conglutination Reactions,Fixation Test, Complement,Fixation Tests, Complement,Reaction, Conglutination,Reactions, Conglutination,Test, Complement Fixation,Tests, Complement Fixation
D004443	Echinococcosis	An infection caused by the infestation of the larval form of tapeworms of the genus Echinococcus. The liver, lungs, and kidney are the most common areas of infestation.	Cystic Echinococcosis,Cysts, Hydatid,Hydatid Cyst,Hydatidosis,Echinococcus Granulosus Infection,Echinococcus Infection,Hydatid Disease,Cyst, Hydatid,Cystic Echinococcoses,Echinococcoses,Echinococcoses, Cystic,Echinococcosis, Cystic,Echinococcus Granulosus Infections,Echinococcus Infections,Granulosus Infection, Echinococcus,Granulosus Infections, Echinococcus,Hydatid Cysts,Hydatid Diseases,Hydatidoses,Infection, Echinococcus,Infection, Echinococcus Granulosus,Infections, Echinococcus Granulosus
D004446	Echinococcus	A genus of very small TAPEWORMS, in the family Taeniidae. The adult form is found in various CARNIVORA but not humans. The larval form is seen in humans under certain epidemiologic circumstances.
D005189	False Positive Reactions	Positive test results in subjects who do not possess the attribute for which the test is conducted. The labeling of healthy persons as diseased when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed)	False Positive Reaction,Positive Reaction, False,Positive Reactions, False,Reaction, False Positive,Reactions, False Positive
D005455	Fluorescent Antibody Technique	Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.	Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000941	Antigens	Substances that are recognized by the immune system and induce an immune reaction.	Antigen