Two symptomatic Toxoplasma infections of laboratory personnel have been serologically followed up for 5.5 and 10 months, respectively. Results obtained by commonly used test systems (indirect fluorescent antibody tests for IgG and IgM antibodies, complement fixation test) were compared with those of two recently developed and improved tests for IgM detection (immunosorbent agglutination assay [...

It is shown by complement fixation studies with protein antigens and specific immune rabbit sera that the rate of fixation of complement is determined by the concentration of antibodies in the immune sera, that the greater part of fixation of complement takes place during the 1st hour, and that fixation is practically completed at the end of 4 hours at ice box temperature. It is further shown t...

The technique of complement fixation test as a measure for the serological diagnosis of neurotropic virus infections was first put in practice by Casals and Palacios (1) in the year 1941, and confirmed of its practical diagnostic value by numerous follow-ups made after it. In spite of repeated attempts, the application of this technique for the diagnosis of poliomyelitis had not been successful...

Taylor-Robinson, David (National Institutes of Health, Bethesda, Md.), Norman L. Somerson, Horace C. Turner, and Robert M. Chanock. Serological relationships among human mycoplasmas as shown by complement-fixation and gel diffusion. J. Bacteriol. 85:1261-1273. 1963.-Antigenic relationships among human mycoplasmas were studied by complement-fixation and agar gel diffusion techniques. Four recogn...

For the first time in Iran, a number of 1736 sera samples of wild pigeons which were collected from different parts at Tehran, were investigated to determine the specific antiornithosis antibody using complement fixation test. In this study, 26,5 percent of samples represented ornithosis. 

Interest in the Reiter strain of Treponema pallidum, a nonpathogenic, cultivatable, anaerobic spirochete, has been stimulated by the demonstration that the organism possesses four antigens; one, a thermolabile protein, being group specific for treponemes (D'Alessandro et al., 1949). This antigen has recently been employed in a Reiter protein complement fixation test for syphilis (Cannefax and G...

A competitive enzyme immunoassay was developed to detect serum complement-fixing antibodies in virus diseases. This assay utilized conglutinin-covered plastic beads as the solid phase to detect specific antibody-antigen complexes that competed for complement with a probe complex comprised of Escherichia coli beta-galactosidase and its specific antibody. Binding to the solid phase is C3bi mediat...

Clinical and serological follow-up of 7 patients submitted to renal transplantation and presenting positive serological reactions to Chagas' disease before immunosuppression did not show significant changes in indirect immunofluorescence and complement fixation titres for Chagas' disease, or signs and symptoms indicating exacerbation of the disease during follow-up. In addition, 18 of 66 recipi...