Update Type: Test Resumed
Test Updated: 07/20/2022
Test Overview
Test Methodology

Indirect Immunofluorescence (IFA)

Test Usage

To aid in the diagnosis of Q Fever (Coxiella burnetii).

Reference Range *

Phase I/Phase II IgG <1:16, Phase I/Phase II IgM: <1:16.

Test Limitations

Low levels of phase II IgG antibody (<1:256) may be considered non-specific.

Test Details
Days Set Up
Monday - Friday
Analytic Time

2 - 5 days

Soft Order Code
MiChart Code
Q Fever Antibody
  • C. burnetii
  • Coxiella Burnetii
  • Coxiella Titer
  • Weil-Felix Agglutinins
  • Febrile Agglutinins
  • Q Fever Ab, IgG and IgM, Serum
  • QF I IgG
  • QF I IgM
  • QF II IgG
  • QF II IgM
  • Q Fever Phase I Ab, IgG
  • Q Fever Phase I Ab, IgM
  • Q Fever Phase II Ab, IgG
  • Q Fever Phase II Ab, IgM
  • Interpretation
Reference Laboratory
Mayo QFP (83149)
Special Testing
Specimen Requirements
Collection Instructions

Collect blood in a red top or SST tube. Centrifuge, aliquot serum into plastic vial and refrigerate.

Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Additional Information

Test includes Phase I and Phase II results for both IgG and IgM. Q Fever Antibody IgG and Q Fever Antibody IgM are also available individually. Test sent to Mayo Medical Laboratories.

CPT Code
86638 x4
Fee Code
NY State Approved