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Clinical Microbiology
​Critical Values
Test Critical Values

Acid-fast culture and/or smears All positives

Blood culture All positives

CSF Cryptococcal antigen All positives

CSF Cryptococcal culture All positives*
* Unless the patient had a positive Cryptococcal antigen from the same specimen.

CSF Gram stain, culture, or PCR All positives

Rev. 11/07