Ordering Recommendation

May assist in confirming suspected Trench fever in patient with typical signs and symptoms and compatible exposure history.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation

Serum separator tube.

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP standard transport tube. (Min: 0.4 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as acute or convalescent.

Storage/Transport Temperature


Unacceptable Conditions

Contaminated, hemolyzed, or severely lipemic specimens.


After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)


Semi-Quantitative Indirect Fluorescent Antibody (IFA)


Mon, Thu


1-8 days

Reference Interval

< 1:64   Negative - No significant level of Bartonella quintana IgG antibody detected.
1:64-1:128   Equivocal - Questionable presence of Bartonella quintana IgG antibody detected.  Repeat testing in 10-14 days may be helpful.
≥1:256   Positive - Presence of IgG antibody to Bartonella quintana detected, suggestive of current or past infection.

Interpretive Data

A low positive result suggests past exposure or infection, while a high positive result may indicate recent or current infection, but is inconclusive for diagnosis.  Seroconversion between acute and convalescent sera is considered strong evidence of recent infection.  The best evidence for infection is a significant change on two appropriately timed specimens where both tests are done in the same laboratory at the same time.

Compliance Category

Analyte Specific Reagent (ASR)


Hotline History


CPT Codes



Component Test Code* Component Chart Name LOINC
0050094 Bartonella quintana Antibody, IgG 9360-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • B. quintana IgG
  • Bartonella quintana IgG
Bartonella quintana Antibody, IgG by IFA