Francisella tularensis Antibody, IgM
Ordering Recommendation
Detects antibodies during acute phase; paired concurrent specimen with IgG reduces false positive rate. Convalescent sera may be required for diagnosis.
Semi-Quantitative Enzyme-Linked Immunosorbent Assay
Mon, Wed, Fri
1-5 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
Serum separator tube (SST), lavender (EDTA), Lt. blue (sodium citrate) or green (sodium or lithium heparin).  
Specimen Preparation
Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.15 mL)  
Storage/Transport Temperature
Unacceptable Conditions
Contaminated, heat-inactivated, or turbid specimens.  
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year  
Reference Interval
Effective May 9, 2011
9 U/mL or less Negative -​ No significant level of IgM antibody to Francisella tularensis detected.
10-​15 U/mL Equivocal -​ Questionable presence of IgM antibody to Francisella tularensis. Repeat testing in 10-​14 days may be helpful.
16 U/mL or greater Positive -​ Presence of IgM antibody to Francisella tularensis detected, suggestive of current or recent exposure/immunization.
Interpretive Data
Cross reactivity with Brucella and Yersinia antibodies may occur. Therefore, results should be interpreted with caution and correlated with clinical information. The best evidence for current infection is a significant change on two appropriately timed specimens, where both tests are performed in the same laboratory at the same time.

Compliance Statement D: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.
CPT Code(s)
Component Test Code*Component Chart NameLOINC
2005352Francisella tularensis Antibody, IgM16878-1
* 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.
  • F. tularensis IgM
  • Francisella Antibodies
  • Francisella Tularensis Ab