Anaplasma phagocytophilum Antibodies, (IgG, IgM)

HGA, Human Granulocytic Anaplasmosis, HGE, Human Granulocytic Ehrlichiosis (HGE)

Test Codes

EPIC: LAB1231961, Beaker: XAPAB, Quest: 34464

Department

Send Outs

Specimen Collection Criteria

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. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.2 mL)

Rejection Criteria

Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46°F). (Minimum: 0.2 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
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.

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Tuesday, Thursday, Saturday.
Results available in 3 days. 

Reference Range

A. phagocytophilum IgG:  <1:64
A. phagocytophilum IgM  <1:20

Test Methodology

Immunofluorescence Assay (IFA)

Clinical Utility

Anaplasma phagocytophilum Antibodies (IgG, IgM) – Anaplasma phagocytophilum is a tick-borne agent that causes an acute febrile illness that often resembles Rocky Mountain spotted fever.

CPT Codes

86666 x 2.

Contacts

Last Updated

11/19/2025