Rocky Mountain Spotted Fever Antibodies, IgG and IgM (Sendout)
General Information
- Lab Name
- Lab Code
- 453
- External Test Id
- 0050371
- Description
Ordering Recommendation: Rocky Mountain spotted fever (RMSF) is a severe tick-borne infection caused by the bacterium Rickettsia rickettsii. Preferred test for acute or convalescent phase of disease. Acute and convalescent titers often necessary.
- References
- ARUP Consult® Tickborne Diseases
- Synonyms
- 0050371, Rickettsia Rickettsii, RMSF, Rocky Mountain Spotted Fever
Interpretation
- Method
Semi-Quantitative Indirect Fluorescent Antibody
- Ref. Range Notes
Reference Ranges:
Rocky Mt Spotted Fever IgG: <1:64 Rocky Mt Spotted Fever IgM: <1:64 Interpretation:
Rickettsia rickettsii (Rocky Mountain Spotted Fever) Antibody, IgG:
Less than 1:64: Negative - No significant level of IgG antibody detected. 1:64 - 1:128: Low Positive - Presence of IgG antibody detected, suggestive of current or past infection. 1:256 or greater: Positive - Presence of IgG antibody suggestive of recent or current infection. Rickettsia rickettsii (Rocky Mountain Spotted Fever) Antibody, IgM:
Less than 1:64: Negative - No significant level of IgG antibody detected. 1:256 or greater: Presence of IgM antibody detected, which may indicate a current or recent infection; however, low levels of IgM antibodies may occasionally persist for more than 12 months post-infection. - Guidelines
Ordering & Collection
- Specimen Type
- Blood
- Collection
-
3 mL blood in RED TOP tube or GOLD SST
- Handling Instructions
Outside Laboratories: Centrifuge sample and transfer serum to a separate plastic vial within 2 hours of collection. Refrigerate serum.
Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Samples must be clearly marked as "acute" or "convalescent."
Stability: Refrigerated (preferred): 2 weeks; Frozen: 1 year (avoid repeat freeze/thaw cycles); Ambient: 48 hours.
Unacceptable Conditions: Contaminated, hemolyzed, or severely lipemic specimens.
- Quantity
-
requested: 1 mL serum
minimum: 0.5 mL serum
Processing
- Processing
Centrifuge sample and transfer serum to a separate plastic vial within 2 hours of collection. Refrigerate serum.
Sendouts:
- Order ARUP Test: 0050371
- Interfaced: Yes [Interface: 602; Department: ARPR]
- Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Samples must be clearly marked as "acute" or "convalescent."
Stability: Refrigerated (preferred): 2 weeks; Frozen: 1 year (avoid repeat freeze/thaw cycles); Ambient: 48 hours.
Unacceptable Conditions: Contaminated, hemolyzed, or severely lipemic specimens.
Performance
- LIS Dept Code
- Performing Location(s)
-
Sendout ARUP Laboratories, Inc.
800-522-2787500 Chipeta Way
Salt Lake City, UT 84108 - Frequency
- Performed: Sunday - Saturday. Reported: 1-3 days.
- Available STAT?
- No
Billing & Coding
- CPT codes
- Billing Comments
CPTs: 86757 x2
- LOINC