Test Code MISC2MAYOEEPC Eastern Equine Encephalitis Antibody Panel, IgG and IgM, Spinal Fluid
Useful For
Aiding in the diagnosis of Eastern equine encephalitis
Method Name
Immunofluorescence Assay (IFA)
Reporting Name
East Equine Enceph Ab Panel, CSFSpecimen Type
CSFOrdering Guidance
This assay detects Eastern equine antibodies only. For a complete arbovirus panel, order ABOPC / Arbovirus Antibody Panel, IgG and IgM, Spinal Fluid.
New York State clients: This test is not available for specimens originating in New York.
Specimen Required
Container/Tube: Sterile vial
Specimen Volume: 0.8 mL
Specimen Minimum Volume
0.70 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
CSF | Refrigerated (preferred) | 14 days | |
Frozen | 14 days |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | OK |
Clinical Information
Eastern equine encephalitis (EEE) is within the alphavirus group. It is a low-prevalence cause of human disease in the Eastern and Gulf Coast states. EEE is maintained by a cycle of mosquito/wild bird transmission, peaking in the summer and early fall, when man may become an adventitious host. The most common clinically apparent manifestation is a mild undifferentiated febrile illness, usually with headache.
Central nervous system involvement is demonstrated in only a minority of infected individuals and is more abrupt and more severe than with other arboviruses, with children being more susceptible to severe disease. Fatality rates are approximately 70% EEE.
Infections with arboviruses can occur at any age. The age distribution depends on the degree of exposure to the particular transmitting arthropod, relating to age, sex, and occupational, vocational, and recreational habits of the individuals. Once humans have been infected, the severity of the host response may be influenced by age.
Reference Values
IgG: <1:1
IgM: <1:1
Reference values apply to all ages.
Interpretation
Detection of organism-specific antibodies in the cerebrospinal fluid (CSF) may suggest central nervous system (CNS) infection. However, these results are unable to distinguish between intrathecal antibodies and serum antibodies introduced into the CSF at the time of lumbar puncture or from a breakdown in the blood-brain barrier. The results should be interpreted with other laboratory and clinical data prior to a diagnosis of CNS infection.
Method Description
Dilutions of cerebrospinal fluid (CSF) are prepared and allowed to react with substrate cells infected with the appropriate arbovirus. If antibodies to this virus are present in the CSF of the patient, an antigen-antibody complex will develop that can be detected by a fluorescein-labeled antibody directed to human globulin.(Tsai TF: Arboviruses. In: Murray PR, Baron EF, Pfaller MA, eds. Manual of Clinical Microbiology. 7th ed. ASM Press; 1999:1107-1124; Beaty BJ, Casals J, Brown KL, et al: Indirect fluorescent-antibody technique for serological diagnosis of LaCrosse [California] virus infections. J Clin Microbiol. 1982;15;429-443; Beckham JD, Tyler KL: Arbovirus Infections. Continuum (Minneap Minn). 2015 Dec;21(6 Neuroinfectious Disease):1599-1611. doi: 10.1212/CON.0000000000000240)
Day(s) Performed
May through October: Monday through Friday
November through April: Monday, Wednesday, Friday
Report Available
Same day/1 to 4 daysPerforming Laboratory

Test Classification
This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
86652 x 2
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
EEPC | East Equine Enceph Ab Panel, CSF | 69035-4 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
26369 | East Equine Enceph Ab, IgG, CSF | 10897-7 |
26370 | East Equine Enceph Ab, IgM, CSF | 10899-3 |
Forms
If not ordering electronically, complete, print, and send a Microbiology Test Request (T244) with the specimen.
Testing Algorithm
See Mosquito-borne Disease Laboratory Testing in Special Instructions.