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PubMed1977

Antibody estimation by indirect complement fixation test for foot-and-mouth disease in cattle.

Antibody against foot-and-mouth disease (FMD) virus was measured by the indirect complement fixation (ICF) test. For this test serum samples were collected from cattle experimentally infected with FMD virus of O, A and Asia 1 types, as well as cattle infected in the field. Two types of antigen were used. One was antigen derived from infected lingual epithelial culture prepared by Frenkel's method with each type of the virus. The other was antigen derived from the lingual epithelium of cattle infected by virus inoculation. ICF antibody began to be dectected about 4 5 days after inoculation. It reached a maximum titer 10 14 days after inoculation, remaining at this titer for about a week or two, and then decreased gradually. It was, however, detectable even 63 days after inoculation. The rise and fall of ICF antibody was parallel with that of neutralizing antibody, although that antibody was always lower in titer than this. ICF antibody was detected type-specifically from cattle infected experimentally and naturally. These results indicated that the ICF test was available for the routine serological diagnosis and epizootiological investigation and research.

Animals↗
PubMed1990

Complement fixation test for the diagnosis of Lyme disease.

Sera from 43 patients were tested for complement-fixing antibodies to Borrelia burgdorferi; these patients included 8 with confirmed Lyme disease, 21 who were serologically positive but not likely to have Lyme disease, and 14 who were serologically negative. Seven individuals, all confirmed Lyme disease patients, had complement-fixing antibodies. Complement fixation may be a useful confirmatory test for Lyme disease.

Antibodies, Bacterial↗
PubMed1976

Automated complement fixation test for the detection of antibodies against the core of hepatitis B virus (HBc).

The automated complement fixation system presented in this paper differs from those described by Studievic et al. (1971) and Vargues and Henley (1974). In the one developed here only one sampler is used with a wheel presenting a double row of cups. This system can assay 60 samples per h and can be modified to double this number. Our unit requires an incubation period of 15 min at 37 degrees C and we have nerver observed any contamination of the samples during the assay run.

Antibodies, Viral↗