Ehrlichia IgG

Tube Type

Test ID LAB794
CPT Code(s)
Group/Individual Test Individual
Laboratory Clinical Immunology
Tube Station 30
Specimen Routine: 6mL Blood/Serum Separator/Gold Top Tube; See Comments.
micro: 2x Full Red Top Serum Separator Pediatric Bullets
Availability Routine: Once per week
Turnaround Time 1-7 Days
Reference Range Normal: IgG: <1:64
Comments Ehrlichia chaffeensis IgG antibodies are detected by indirect immunoflourescent assay(IFA). Sera are screened for IgG antibodies at a 1:64 dilution. Sera collected during the first 1 to 2 weeks after onset of illness may be negative in these tests and a second serum collected 2 to 3 weeks later is recommended. A single IgG titer >1:64 indicates exposure to E. chaffeensis. A fourfold rise in IgG titer between acute serum and a convalescent serum collected 2 to 3 weeks later suggests recent or current infection.

Reviewed by Christopher Parker on November 30, 2021

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514