Antibody Titer, Erythrocytes
Method Description Describes how the test is performed and provides a method-specific reference
The specificity of the antibody to be titered is first determined and optimal phases of reactivity are selected. Two-fold serial dilutions of serum are tested against antigen-positive erythrocytes under optimal conditions. The result is the reciprocal of the highest dilution at which macroscopic agglutination (1+) is observed. Parallel titration of a previous specimen of the patient's serum (frozen) provides a baseline for comparison of antibody level. In the absence of a previous specimen from the patient, parallel titration of a control antiserum is used for standardization.
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Monday through Friday; Continuously, Saturday; 12 a.m.-4 p.m.,
Sunday; 7 a.m.-12 a.m.