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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
VARICELLA-ZOSTER(IGM) AB(Q)
MessageSENDOUT/QUEST
Test Code
VAR/ZOST IGM
Preferred Specimen
SERUM
Minimum Volume
1mLS
Instructions
DRAW IN SST-GOLD TUBE, LET CLOT, SPIN, SEND TO LAB
Transport Container
ORIGINAL TUBE
Transport Temperature
REFRIGERATED
Specimen Stability
Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic • Grossly icteric
Methodology
Immunoassay (IA)
Setup Schedule
TUES-SAT AM
Report Available
NEXT DAY
Reference Range
VZV Ab (IgM) ≤0.90
Interpretive criteria
0.00-0.90 Negative
0.91-1.09 Equivocal
≥1.10 Positive
Results from any one IgM assay should not be used as a sole determinant of a current or recent infection. Because an IgM test can yield false positive results and low levels of IgM antibody may persist for more than 12 months post infection, reliance on a single test result could be misleading. If an acute infection is suspected, consider obtaining a new specimen and submit for both IgG and IgM testing in two or more weeks.
Interpretive criteria
0.00-0.90 Negative
0.91-1.09 Equivocal
≥1.10 Positive
Results from any one IgM assay should not be used as a sole determinant of a current or recent infection. Because an IgM test can yield false positive results and low levels of IgM antibody may persist for more than 12 months post infection, reliance on a single test result could be misleading. If an acute infection is suspected, consider obtaining a new specimen and submit for both IgG and IgM testing in two or more weeks.
Performing Laboratory
Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153
