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Ehrlichia chaffeensis Antibodies (IgG & IgM)

Item Value
Approval req'd? No
Available Stat? No
Test code EHRL
Test group Ehrlichia
Performed by Focus via Quest
Sendout? Yes
Method Immunofluorescence assay
Container type Red top (Gold top NOT acceptable)
Amount to Collect 2 mL blood
Sample type Serum
Preferred volume 1 mL serum
Min. Volume 0.2 mL serum
UCSF Rejection Criteria Sample collected in Gold top
Processing notes Refrigerate sample. Order Quest # 8524N
Units titer
Normal range
IgG < 1:64 titer
IgM < 1:20 titer
Synonyms Human Monocytic ehrlichiosis; HME
Stability Room temperature 4 days, refrigerated 1 week, frozen at -20C 1 month.
Turn around times Set up 6x per week, turnaround 4-5 days
Additional information Human monocytic ehrlichiosis (HME), a tick-transmitted disease caused by Ehrlichia chaffeensis bacteria and is often described as 'spotless' rocky mountain spotted fever has been reported in various regions of the United States. Infected individuals produce specific antibody to E. chaffeensis which can be detected by the IFA test. A single IgG titer of 1:64 or greater indicates exposure to E. chaffeensis. A four fold or greater rise in IgG titer between acute and convalescent sera and/or an IgM titer of 1:20 or more is suggestive of recent or current infection.

This test was developed and its performance characteristics determined by Quest Diagnostics Nichols Institute. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. Performance characteristics refer to the analytical performance of the test.
CPT coding 86666-90 x2
LOINC code 45059-3
Last Updated 10/28/2013 11:48:35 AM
Entry Number 335
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