Francisella tularensis Antibodies, IgG and IgM with Reflex to Agglutination

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Ordering Recommendation

Preferred test for detecting antibodies during acute or convalescent phase. Convalescent sera may be required for diagnosis.

Mnemonic

FTULARPANR

Methodology

Semi-Quantitative Enzyme-Linked Immunosorbent Assay

Performed

Mon, Wed, Fri

Reported

1-6 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation
Collect

Serum separator tube (SST) or Plain Red/Red-Top

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.6 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Contaminated, heat-inactivated, or turbid specimens.

Remarks
Stability

After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 month

Reference Interval

Test Number
 Components
 Reference Interval
  Francisella tularensis Antibody, IgG 9 U/mL or less
  Francisella tularensis Antibody, IgM 9 U/mL or less

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.


Component Interpretation
Francisella tularensis Antibody, IgG 9 U/mL or less  Negative - No significant level of IgG antibody to Francisella tularensis detected.
10-15 U/mL  Equivocal - Questionable presence of IgG antibody to Francisella tularensis. Repeat testing in 10-14 days may be helpful.
16 U/mL or greater  Positive - Presence of IgG antibody to Francisella tularensis detected, suggestive of current or past exposure/immunization.
Francisella tularensis Antibody, IgM 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

Compliance Category

Laboratory Developed Test (LDT)

Note

If the ELISA testing is equivocal or positive for IgG and/or IgM, then Francisella tularensis Antibodies by Agglutination will be added. Additional charges apply.

Hotline History

N/A

CPT Codes

86668 x2, if reflexed add 86000

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Components

Component Test Code* Component Chart Name LOINC
2005351 Francisella tularensis Antibody, IgG 70121-9
2005352 Francisella tularensis Antibody, IgM 16878-1
* 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.

Aliases

  • F. tularensis IgG, IgM
  • Febrile Antigens
  • Francisella Antibodies
  • Francisella Tularensis Ab
Francisella tularensis Antibodies, IgG and IgM with Reflex to Agglutination