Comparative sensitivity of six serological tests and diagnostic value of ELISA using purified antigen in hydatidosis. 2001

Y Sbihi, and A Rmiqui, and M N Rodriguez-Cabezas, and A Orduña, and A Rodriguez-Torres, and A Osuna
Instituto de Biotecnología, Facultad de Ciencias, Universidad de Granada, Granada, Spain.

Most serodiagnostic techniques have been evaluated for diagnosis of cystic hydatid disease caused by Echinococcus granulosus. Each, to varying degrees, has been shown to give false results, with considerable variation between laboratories. The comparative study was made concerning the sensitivity of the immunodiagnostic methods based on 58 sera from hydatid disease with different cyst locations. Latex agglutination, immunoelectrophoresis (IEP), and specific IgE, IgG enzyme-linked immunosorbent assay (ELISA) tests were studied. Specific IgG ELISA AgB (antigen B-rich fraction) was the most sensitive test (96.5%) and the least sensitive tests were specific IgE ELISA (24.1%) and IEP (25.8%). The low sensitivity of these two tests was due partly to the low reactivity detected in the sera of patients with lung hydatidosis. Initial laboratory studies showed purified antigens to be preferable to crude cyst fluid, regardless of the type of test used. For this reason, we evaluated the sensitivity and specificity of ELISA by using the purified antigen-B-rich fraction. In all, 117 sera were examined: 78 sera from patients with hydatidosis surgically confirmed, 15 sera from healthy control subjects, and 24 sera from patients with diseases other than hydatidosis. The method gave good results: 93.5% sensitivity, 89.7% specificity, and 92.3% diagnostic efficacy.

UI MeSH Term Description Entries
D007074 Immunoglobulin G The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B. Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
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
D004444 Echinococcosis, Hepatic Liver disease caused by infections with parasitic tapeworms of the genus ECHINOCOCCUS, such as Echinococcus granulosus or Echinococcus multilocularis. Ingested Echinococcus ova burrow into the intestinal mucosa. The larval migration to the liver via the PORTAL VEIN leads to watery vesicles (HYDATID CYST). Alveolar Echinococcosis, Hepatic,Echinococcosis, Hepatic Alveolar,Hydatid Cyst, Hepatic,Hydatidosis, Hepatic,Cyst, Hepatic Hydatid,Cysts, Hepatic Hydatid,Hepatic Alveolar Echinococcosis,Hepatic Echinococcosis,Hepatic Hydatid Cyst,Hepatic Hydatid Cysts,Hepatic Hydatidosis,Hydatid Cysts, Hepatic
D004445 Echinococcosis, Pulmonary Helminth infection of the lung caused by Echinococcus granulosus or Echinococcus multilocularis. Hydatid Cyst, Pulmonary,Hydatidosis, Pulmonary,Cyst, Pulmonary Hydatid,Cysts, Pulmonary Hydatid,Echinococcoses, Pulmonary,Hydatid Cysts, Pulmonary,Hydatidoses, Pulmonary,Pulmonary Echinococcoses,Pulmonary Echinococcosis,Pulmonary Hydatid Cyst,Pulmonary Hydatid Cysts,Pulmonary Hydatidoses,Pulmonary Hydatidosis
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.
D004797 Enzyme-Linked Immunosorbent Assay An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed. ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D005188 False Negative Reactions Negative test results in subjects who possess the attribute for which the test is conducted. The labeling of diseased persons as healthy when screening in the detection of disease. (Last, A Dictionary of Epidemiology, 2d ed) False Negative Reaction,Reaction, False Negative,Reactions, False Negative
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000909 Antibodies, Helminth Immunoglobulins produced in a response to HELMINTH ANTIGENS. Helminth Antibodies

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