Confirm presence of Rickettsia typhi. Requires comparison of acute- to convalescent-phase serology.
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)
|Typhus Fever Antibody, IgG||Less than 1:64|
|Typhus Fever Antibody, IgM||Less than 1:64|
|Rickettsia typhi (Typhus Fever) Antibody, IgG by IFA||Less than 1:64 Negative - No significant level of IgG antibody detected.
1:64-1:128 Equivocal - Questionable presence of IgG antibody detected. Repeat testing in 10-14 days may be helpful.
1:256 or greater Positive - Presence of IgG antibody detected, suggestive of current or past infection
|Rickettsia typhi (Typhus Fever) Antibody, IgM by IFA||Less than 1:64 Negative - No significant level of IgM antibody detected.
1:64 or greater Positive - Presence of IgM antibody to 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|
|0050381||Typhus Fever Antibody, IgG||5324-9|
|0050383||Typhus Fever Antibody, IgM||5325-6|
- Murine Typhus Antibodies
- R. typhi antibodies
- Typhus Fever Group Antibody, IgG and IgM, Serum