ROCKY MOUNTAIN SPOTTED FEVER G

LAB3179

 

Collect

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: 0.05 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."

Unacceptable Conditions

Contaminated, hemolyzed, or severely lipemic specimens.

Storage/Transport Temperature

Refrigerated.

Stability (from collection to initiation)

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

Performed

Mon-Fri

Methodology

Semi-Quantitative Indirect Fluorescent Antibody

Reported

1-4 days

Synonyms

  • Rocky Mountain Spotted Fever Antibody, IgG
  • LAB3179
  • RMSF IGG

Ordering Recommendations

Detects antibodies during convalescent phase.

Reference Interval

Less than 1:64: Negative - No significant level of Rickettsia rickettsii Antibody, IgG detected.
1:64 - 1:128: Low Positive - Presence of Rickettsia rickettsii Antibody, IgG detected, suggestive of current or past infection.
1:256 or greater: Positive - Presence of Rickettsia rickettsii Antibody, IgG suggestive of recent or current infection.

Interpretive Data

The best evidence for current infection is a significant change on two appropriately timed specimens, where both tests are done in the same laboratory at the same time.

CPT Codes

86757
Collection

LAB3179

 

Collect

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: 0.05 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."

Unacceptable Conditions

Contaminated, hemolyzed, or severely lipemic specimens.

Storage/Transport Temperature

Refrigerated.

Stability (from collection to initiation)

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

Performed

Mon-Fri

Methodology

Semi-Quantitative Indirect Fluorescent Antibody

Reported

1-4 days

Synonyms

  • Rocky Mountain Spotted Fever Antibody, IgG
  • LAB3179
  • RMSF IGG

Ordering Recommendations

Detects antibodies during convalescent phase.
Result Interpretation

Reference Interval

Less than 1:64: Negative - No significant level of Rickettsia rickettsii Antibody, IgG detected.
1:64 - 1:128: Low Positive - Presence of Rickettsia rickettsii Antibody, IgG detected, suggestive of current or past infection.
1:256 or greater: Positive - Presence of Rickettsia rickettsii Antibody, IgG suggestive of recent or current infection.

Interpretive Data

The best evidence for current infection is a significant change on two appropriately timed specimens, where both tests are done in the same laboratory at the same time.

Administrative

CPT Codes

86757

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