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A consistently and repeatedly negative IFA-ANA is:

IgM antibodies are frequently hemolytic because of:

Cold agglutinins are often found in the serum of a patient with

The FTA-ABS test for the serological diagnosis of syphilis is:

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

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

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

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

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

Acquired (adaptive) immune response differs from innate (natural) immune response in that the acquired immune response: