ToRCH Profile IgG, Serum
Method Description Describes how the test is performed and provides a method-specific reference
Detection of IgG-class antibodies to Toxoplasma gondii, rubella, cytomegalovirus, and herpes simplex virus types 1 and 2 is performed on the BioPlex 2200 system which uses multiplex flow immunoassay technology. Five different populations of fluorescent dyed beads are each coated with antigens unique to each infectious organism. Patient sample is combined with sample diluent and the 5 bead set and incubated at 37 degrees C. During this time IgG antibodies will bind to the antigen coated beads. After a wash cycle, a fluorescently labeled anti-human IgG antibody conjugate is added to the mixture and incubated at 37 degrees C. Following a wash step to remove unbound conjugate, the bead mixture is passed through a detector which identifies the bead based on dye fluorescence and determines the amount of antibody captured by the antigen based on fluorescence of the anti-human IgG conjugate. Raw data is calculated in relative fluorescence intensity and is converted to an Antibody Index (AI) for interpretation. Three additional dyed beads, an internal standard bead, a serum verification bead, and a reagent black bead are present in each reaction mixture to verify detector response, the addition of serum to the reaction vessel and the absence of significant non-specific binding in serum, respectively.(Package inserts: BioPlex 2200 System, ToRC IgG and MMRV IgG, Bio-Rad Laboratories, Clinical Diagnostics Group, Hercules, CA)
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 Saturday, 9 a.m.
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
Same day/1 day
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Performing Laboratory Location The location of the laboratory that performs the test