A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Legionella pneumophila Antibody (IgG), IFA
Test CodeLEGION IGG
Quest Code
36580
CPT Codes
86713
Preferred Specimen
1 mL serum
Minimum Volume
0.2 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Methodology
Immunofluorescence Assay (IFA)
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Setup Schedule
Sets up 5 days a week.
Reference Range
<1:64 titer
Clinical Significance
Legionella infection is associated with 2 clinically and epidemiologically distinct illnesses, Legionnaires' disease and Pontiac fever. Legionnaires' disease is characterized by fever, cough, myalgia, and pneumonia, whereas, Pontiac fever is a milder illness without pneumonia. Inhaling aerosols of water contaminated with Legionella species is believed to be the primary mode of infection; the incubation period is generally 2-10 days. The assays performed detect antibodies to Legionella pneumophila serogroups 1-7. An IgM titer >1:256 provides presumptive evidence of infection at an undetermined time. A 4-fold rise in IgG titer to ≥1:256 between acute and convalescent sera may be used in the laboratory confirmation of Legionella infection with these serogroups of L. pneumophila.
Performing Laboratory
Quest Diagnostics Nichols Institute |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |