ARUP's Laboratory Test Directory

Febrile Antibodies Panel : 2001789

Mnemonic: FEB ABS

Methodology: Semi-Quantitative Agglutination/Semi-Quantitative Indirect Fluorescent Antibody/Qualitative Immunoblot
Performed: Mon-Fri
Reported: 2-5 days
Specimen Required: Collect: Serum separator tube.

Specimen Preparation: Remove serum from cells ASAP or within 2 hours of collection. Transfer 2.5 mL serum to an ARUP Standard Transport Tube. (Min: 1.5 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.

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Contaminated or heat-inactivated specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen 1 year
Reference Interval:
 
Test Number Components Reference Interval
0050135Brucella Antibody (Total) by Agglutination  < 1:20 Negative
0050369Rickettsia rickettsii (Rocky Mountain Spotted Fever) Antibody, IgG 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.
0050372Rickettsia rickettsii (Rocky Mountain Spotted Fever) Antibody, IgM Less than 1:64: Negative - No significant level of Rickettsia rickettsii Antibody, IgM detected.
1:64 or greater: Positive - Presence of Rickettsia rickettsii Antibody, IgM 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.
0050381Rickettsia typhi (Typhus Fever) Antibody, IgG by IFA < 1:64  Negative - No significant level of Rickettsia typhi IgG antibody detected.
1:64-1:128  Equivocal - Questionable presence of Rickettsia typhi IgG antibody detected.  Repeat testing in 10-14 days may be helpful.
≥ 1:256  Positive - Presence of IgG antibody to Rickettsia typhi detected, suggestive of current or past infection.
0050383Rickettsia typhi (Typhus Fever) Antibody, IgM by IFA < 1:64  Negative - No significant level of Rickettsia typhi IgM antibody detected.
≥1:64  Positive - Presence of IgM antibody to Rickettsia typhi detected, suggestive of recent infection.
2001586Salmonella typhi Antibodies  
 
Test Number Components Reference Interval
 Salmonella typhi H type A Total Antibody Refer to report
 Salmonella typhi H type B Total Antibody Refer to report
 Salmonella typhi H type D Total Antibody Refer to report
 Salmonella typhi O type D Total Antibody Refer to report
 Salmonella typhi O type Vi Total Antibody Refer to report
CPT Code(s): 86622; 86757 x4; 86768 x5