Cholesterol is added to the antigen used in flocculation tests for syphilis to:

The serological test that can be modified to selectively detect only specific IgM antibody in untreated serum is:

The specificity of an immunoassay is determined by the:

In pernicious anemia, which of the following antibodies is characteristically detected?

Initiation of the activation mechanism of the alternative complement pathway differs from that of the classic pathway in that:

Washed red blood cells would be the product of choice for a patient with:

Which antibody isotype is important for the laboratory diagnosis of congenital rubella or primary infection in the mother?

Cells that assist B cells in responding to antigen molecules are:

Cells that are precursors of plasma cells that produce immunoglobulins are:

Patients suffering from Waldenstrom macroglobulinemia demonstrate excessively increased concentrations of which of the following?