TRCHG - Performance: ToRCH Profile IgG, Serum

Test Catalog

Test Name

Test ID: TRCHG    
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 antihuman 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 that identifies the bead based on dye fluorescence and determines the amount of antibody captured by the antigen based on fluorescence of the antihuman IgG conjugate. Raw data are 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 nonspecific binding in serum, respectively.(Package inserts: BioPlex 2200 System, ToRC IgG and MMRV IgG, Bio-Rad Laboratories, Clinical Diagnostics Group, Hercules, CA)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


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

3 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

14 days

Performing Laboratory Location The location of the laboratory that performs the test