Enhanced-latex-agglutination assay for C-reactive protein in serum, with use of a centrifugal analyzer.

This is an improved assay of C-reactive protein in serum, for use with the Baker "Encore" centrifugal analyzer. Features of this assay include: 250-specimen throughput per hour, within-batch CV 2.2%, between-batch CV 2.

Insulin dependence: problems with the classification of 100 consecutive patients.

We have evaluated the clinical and immunogenetic features of 100 consecutive patients presenting to an adult diabetic clinic who were judged clinically to need insulin therapy but were not sufficiently ill to be admitted to hospital. Over this same period 15 newly diagnosed patients (aged 13-70 years) were started on insulin as in-patients of whom ten were in ketoacidosis. The 100 out-patients, aged 11-75 years at the time of starting insulin, were followed for at least a year.

C reactive protein concentrations in neonates: determination by a latex enhanced immunoassay.

A latex enhanced immunoassay on a centrifugal fast analyser was used to compare serum C reactive protein concentrations in maternal and neonatal blood. In the neonate the C reactive protein concentration at birth was less than 1.0 mg/l; the concentration rose slightly during the first two weeks of life.

Kinetics of the antigen:antibody reaction. Light scattering and particle size measurement using photon correlation spectroscopy.

Many techniques for the estimation of specific proteins measure light scattered by, or the turbidity of, suspensions of antigen:antibody aggregates formed in fluid-phase reactions. Although the shapes of reaction curves obtained are well documented, interpretation of the data in relation to the laws of light scattering and the mechanism of the antigen:antibody reaction are poorly described in the literature. Using photon correlation spectroscopy it has been shown that antigen:antibody complexes continue to grow in size even when no further increases in scatter intensity or turbidity are apparent.

Monoclonal antibodies to human IgG: reaction characteristics in the centrifugal analyzer.

We used monoclonal antibodies to human IgG in a kinetic turbidimetric method with a centrifugal analyzer. Results for total IgG with monoclonal and polyclonal reagents correlated well (r = 0.979).