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Test Code LAB2621 Bartonella Antibody Panel, IgG and IgM, Serum

Additional Codes

BART

Useful For

Diagnosis of Bartonella infection, especially in the context of a cat scratch

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Specimen Required


Supplies: Sarstedt Aliquot Tube 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot serum into plastic vial.


Specimen Minimum Volume

0.15 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 30 days
  Frozen  30 days

Reference Values

BARTONELLA HENSELAE

IgG: <1:128

IgM: <1:20

 

BARTONELLA QUINTANA

IgG: <1:128

IgM: <1:20

Day(s) Performed

Monday through Saturday

CPT Code Information

86611 x 4

LOINC Code Information

Test ID Test Order Name Order LOINC Value
BART Bartonella Ab Panel, IgG and IgM 90251-0

 

Result ID Test Result Name Result LOINC Value
15659 Bart Henselae IgG In Process
15660 Bart Henselae IgM In Process
15661 Bart Quintana IgG In Process
15662 Bart Quintana IgM In Process

Interpretation

A positive immunofluorescence assay (IFA) IgM (titer >1:20) suggests a current infection with either Bartonella henselae or Bartonella quintana.

 

A positive IgG (titer >1:128) suggests a current or previous infection. Increases in IgG titers in serial specimens suggest active infection.

 

Normal serum specimens usually have an IgG titer of less than 1:128. However, 5% to 10% of healthy controls exhibit a B henselae and B quintana titer of 1:128. Sera from healthy volunteers rarely show titers of 1:256 or greater. IgM titers in normal serum are typically less than 1:20. IgM titers at 1:20 or greater have not been seen in the normal population.

 

Molecular testing of tissue for Bartonella species nucleic acid is recommended in cases of suspected endocarditis.

Method Description

The Euroimmun indirect immunofluorescence test is a standardized, in vitro assay for the determination of specific antibodies against Bartonella henselae and Bartonella quintana. BIOCHIP Mosaics are coated with B henselae and B quintana infected cells positioned next to each other in one reaction field. Samples are diluted and incubated on the substrate slides. If the reaction is positive, specific antibodies of class IgG and IgM attach to the antigens. In a second step, the attached antibodies are stained with fluorescein-labeled anti-human antibodies and made visible using fluorescence microscopy. Semiquantitative endpoint titers are obtained by testing serial dilutions of positive specimens.(Unpublished Mayo method)

Report Available

Same day/1 to 3 days

Specimen Retention Time

14 days

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject

Method Name

Immunofluorescence Assay (IFA)

Forms

If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.