Rickettsia rickettsii (Rocky Mountain Spotted Fever) Antibodies, IgG & IgM by IFA
Preferred test for acute or convalescent phase of disease. Acute and convalescent titers often necessary.
Semi-Quantitative Indirect Fluorescent Antibody
New York DOH Approval Status
Serum Separator Tube (SST).
Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens.
Contaminated, hemolyzed, or severely lipemic specimens.
Mark specimens plainly as "acute" or "convalescent."
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
|Rocky Mt Spotted Fever IgG||Less than 1:64|
|Rocky Mt Spotted Fever IgM||Less than 1:64|
|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 IgM antibody detected.
1:64 or greater Positive - 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.
|Component Test Code*||Component Chart Name||LOINC|
|0050369||Rocky Mt Spotted Fever IgG||5307-4|
|0050372||Rocky Mt Spotted Fever IgM||5308-2|
- Rocky Mountain Spotted Fever