The quantitative relation between complement and complement fixing antibody

Complement-fixing antibody response to rotavirus infection.

A human rotavirus complement-fixing (CF) antigen, prepared by purification of large volumes of fluid feces collected from children with winter diarrhea, was used to study the development and persistence of antibody in children with diarrhea and the prevalence of rotavirus antibody in Melbourne. In children with diarrhea, antibody rises were detectable within 4 to 6 weeks of the onset of illness...

Quantitative Influence of Antibody and Complement

effect measurable lysis, and lysis increases linearly with increasing levels of antibody sensitization. 100 ,ug/ ml of IgGI abolished lysis even at maximal levels of anti-D sensitization (15,000 molecules/cell). Two isoimmune IgG anti-A or anti-B antisera were 5 to 10-fold less efficient in promoting phagocytosis or lysis per molecule of IgG bound; however, because of the greater antigen densit...

pH Resistance of Foot-and-Mouth Disease Virus and its Complement-Fixing Antigen

Complement-fixing activity of rheumatoid synovial fluid.

Haemolytic complement activity has been shown to be reduced in synovial fluid of patients with rheumatoid arthritis as compared with patients with inflammatory effusions of similar protein content due to other causes (Hedberg, 1963; Pekin and Zvaifler, 1964; Fostiropoulous, Austen, and Bloch, 1965; Peltier, Coste, and Delbarre, 1966; Townes and Sowa, 1970). Anticomplementary activity was not ob...

Complement-fixing antibodies in cattle experimentally infected with Theileria annulata or vaccinated with tissue cultures