Epic Code LAB1231978 Ehrlichia chaffeensis (IgG, IgM)

Test Name Alias

HGE, Human Granulocytic Ehrlichiosis, HME, Human Monocytic Ehrlichiosis, Ehrlichia Chaffeensis Antibodies, IgG and IgM | Ehrlichia Ab | Quest: 34271

Interface Order Alias

1231978

Clinical Information

Ehrlichia chaffeensis (IgG, IgM) - Human Monocytic Ehrlichiosis (HME) is a tick-borne infection caused by Ehrlichia chaffeensis. Infections range in severity from asymptomatic to life-threatening, especially in patients who are immunocompromised.

Specimen Requirements

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and

maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells within two hours of collection. Transfer serum to a plastic transport tube and

maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Specimen Transport Temperature

Transport: 1.0 mL serum, room temperature (20-26°C or 68-78.8°F) (Minimum: 0.2 mL)

Rejection Criteria

Hemolyzed specimens.
Severely lipemic specimens.
Specimens not collected and processed as indicated.

Specimen Stability

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 hours
Refrigerated (2-8°C or 36-46°F): 14 days
Frozen (-20°C/-4°F or below): 30 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Test Frequency

Tuesday, Thursday, Saturday
Results available in 3 days.

Reference Range

By report.

Performing Department

Send Outs

Performing Department Laboratory Location

Sent to Quest Diagnostics- Great Lakes Region

Methodology

Immunofluorescence Assay (IFA)

CPT

34271

Reviewed Date

10/30/2025

Orderable Regions