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Cryptococcal antigen

Item Value
Approval req'd? No
Available Stat? No
Test code P253
Test group Cryptococcus neoformans
Performed by Microbiology
In House Availability CSF: Daily, day and evening shifts until 9 PM
Serum: Once daily on day shift
Method Lateral flow assay
Container type Gold top, CSF tube or sterile collection tube
Amount to Collect 2 mL blood or 1 mL CSF
Sample type Serum, CSF
Preferred volume 1 mL serum or CSF
UCSF Rejection Criteria Hemolyzed samples. More than one serum in one week or more than one CSF in 48 hours.
Normal range Negative
Critical value Positive results from CSF.
Synonyms CRAG; Cryptococcus latex agglutination
Stability Refrigerated 3 days, frozen 2 weeks
Turn around times 1 day
Reflex? Positive results are titered at a separate charge (B254).
Additional information Call Microbiology (x3-1268) for assistance with interpretation.

Order Bacterial Culture, CSF in conjunction with initial CSF cryptococcal antigen test.

Serum specimens are repeated at 7-day intervals and CSF at 2-day intervals, whether previously positive or negative.
CPT coding 87899
LOINC code 38390-1
Last Updated 11/12/2014 1:40:27 PM
Entry Number 275
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