Chlamydia Antibody Panel, IgG by IFA
Ordering Recommendation
Semi-Quantitative Indirect Fluorescent Antibody
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Plain red or serum separator tube.  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer1 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 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
Unacceptable Conditions
Contaminated, hemolyzed, or hyperlipemic sera.  
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
< 1:64 C. trachomatis IgG.
< 1:64 C. pneumoniae IgG.
1:64 C. psittaci IgG.
Interpretive Data
The Chlamydia antibody test contains both species- and genus-specific antigens, and serological cross-reactions may be seen in both acute and convalescent samples (less than 1:128). A C. pneumoniae-specific reaction will exhibit titers twofold or greater than titers observed with C. trachomatis or C. psittaci serology. Any IgG titer may indicate past exposure to that particular species. IgG titers in recently infected individuals are typically greater than or equal to 1:512.

The Chlamydia microimmunofluorescent assay slides utilize C. psittaci, C. pneumoniae, and nine serotypes of C. trachomatis. The LGV strains of C. trachomatis are not included in this assay.

See Compliance Statement A:
In adult populations, the prevalence of antibody titers indicative of exposure to the organism ranges from 50-78%.
CPT Code(s)
86631 x3
Component Test Code*Component Chart Name
0065104C. pneumoniae IgG Titer
0065106C. trachomatis IgG Titer
0065107C. psittaci IgG Titer
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, contact interface support at
Cross References
  • Chlamydia IgG Ab
  • CT IgG Ab