Cryptococcus Antigen

Test ID: 

705941

CPT code:

87899

Clinical Use:

Aid in establishing the presence of Cryptococcus neoformans or Cryptococcus gattii infection

Test Information:

Published data for the median sensitivity and specificity for serum specimens are 100% and 99.5%, respectively. False-positive results due to the presence of rheumatoid factor have not been noted with the cryptococcal antigen lateral flow immunochromatographic assay. A negative test does not preclude diagnosis of Cryptococcus infection, particularly if only a single specimen has been tested and the patient shows symptoms consistent with cryptococcosis.

Specimen Type:

Published data for the median sensitivity and specificity for serum specimens are 100% and 99.5%, respectively. False-positive results due to the presence of rheumatoid factor have not been noted with the cryptococcal antigen lateral flow immunochromatographic assay. A negative test does not preclude diagnosis of Cryptococcus infection, particularly if only a single specimen has been tested and the patient shows symptoms consistent with cryptococcosis.

Requested Volume: 

2 mL

Minimum Volume: 

0.5 mL

Container Type: 

Gel-barrier tube or red-top tube

Storage Instructions:

Refrigerate.

Stability Requirements:

Expected Turnaround Time:

1 to 2 Days

Rejection Criteria

Quantity not sufficient for analysis; inappropriate specimen source; inappropriate specimen collection device; hemolysis; lipemia; specimen stability exceeded; name discrepancy between the name on the specimen container and the name in the computer or on the test request form