III. Complement Fixation Tests of High and Low Molecular Antigen

Complement Fixation Tests in Pertussis.

Bordet and Gengou (1), in 1906, performed serological tests on pertussis employing the organisms which they discovered and claimed to be the causative agent of whooping cough as the antigen for the complement fixation test. They got a positive reaction in most cases of the disease. Yet, later investigations failed to confirm these results. Among those who confirmed their results were Renaux (2)...

Complement Fixation Tests in Poliomyelitis **

Infection with poliomyelitis virus gives rise to complement-fixing (C-F) antibodies which may be detected with antigens prepared either from the brains of infected mice or tissue culture fluids, as shown with Type II by Casals et al."' and with all three types by Svedmyr et al.' These workers used sufficient antigen in each test to obtain maximum sensitivity. With this antigen concentration the...

Studies on Complement Fixation in Tuberculosis. Iii

The prolonged extraction of the tubercle bacillus with boiling ethyl alcohol, followed by one or more reprecipitations by chilling the hot alcoholic solution, easily yields a preparation very active as antigen in the complement fixation reaction. This preparation gives a precipitation reaction with high dilution of the normal blood serum of a number of species. The precipitation reaction presen...

The coccidioidal complement fixation and immunodiffusion-complement fixation antigen is a chitinase.

Culture filtrates and autolysates of Coccidioides immitis have provided suitable crude antigens for the serodiagnosis and prognosis of coccidioidomycosis. One of these, a heat-labile antigen which participates in the immunodiffusion reaction corresponding to the complement fixation reaction (IDCF), has been characterized as a 110-kDa native protein that, when subjected to reducing conditions an...

Cat scratch disease: results of complement-fixation and skin tests.