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Ehrlichia chaffeensis Antibodies (IgG, IgM)

Clinical System Name

Miscellaneous Test


E chaffeensis Ab
E. chaffeensis Ab
HME (human monocytic ehrlichosis)
human monocytic ehrlichosis

Sample Requirements

Specimen: Whole Blood

Container(s): Red or Gold SST or Gold Microtainer

Preferred Vol: 2.0 mL

Minimum Vol: 0.5 mL


Processing Instructions

Reject due to: Gel separator or SST tube

Spin: Y

Aliquot: Y

Temp: 2 - 4 C

Storage location: Spin sample and aliquot serum into plastic aliquot tube. Refrigerate sample in CPA refrigerator send-outs rack.


Off-site collection: Spin blood and aliquot serum into plastic aliquot tube. Transport room temperature.


Specimen Type Temperature Time
Serum Room temp

7 d

  Refrigerated 14 d
  Frozen -20 30 d



STAT Performed TAT

M - Sa

2 - 4 d


Performing Laboratory

Quest Diagnostics Infectious Disease, Inc.

33608 Ortega Highway, Bldg B-West Wing

San Juan Capistrano, CA 92675-2042


Phone Number: (800) 642-4657


Department: Send Outs

Phone Number: (206) 987-2563

CPT Codes

86666 (x2)


Method: Immunofluorescence Assay (IFA)

Analytical Volume: 0.2 mL Serum


Reference Range

E. chaffeensis IgG < 1:64
E. chaffeensis IgM < 1:20


Send Out Instructions

Reference Test Name:

Ehrlichia chaffeensis Antibodies (IgG, IgM)

Reference Test Number:


Instructions: Send out Monday through Friday with the Quest courier.