ARUP's Laboratory Test Directory

Eastern Equine Encephalitis Antibody, IgG by IFA, Serum : 0050509

Mnemonic: EASTERN

Methodology: Indirect Fluorescent Antibody
Performed: Tue, Fri
Reported: 1-5 days
Specimen Required: Collect:  One 4 mL serum separator tube.

Storage/Transport Temperature:  1 mL serum at 2-8°C. (Min: 0.05 mL)  Submit specimen in an ARUP Standard Transport Tube.

Remarks:  Separate serum from cells ASAP. Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" or "convalescent."

Unacceptable Conditions:  Severely contaminated, severely lipemic, or hemolyzed specimens.

Stability (collection to initiation of testing):  After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Reference Interval:
Less than 1:16
Interpretive Data: A positive result for IgG may suggest current or past infection. Eastern equine encephalitis and western equine encephalitis viruses are both related and will show cross-reactivity. Initial infection by one of these viruses will show a specific rise in titer which is higher than titers against any other viruses of the group. A subsequent infection by another virus within this group, however, will boost the titer against the initial infecting virus (anamnestic response) and make a specific diagnosis difficult.
CPT Code(s): 86652
Cross References: Encephalitis Antibody, Eastern Equine IgG
 
 

 

 

 
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