What are the tests for cryptococcus?

Multiple: Tests that may be done include: blood culture ct scan of the head sputum culture and stain lung biopsy bronchoscopy spinal tap to obtain a sample of cerebrospinal fluid (csf) cerebrospinal fluid (CSF) culture and other tests to check for signs of infection chest x-ray cryptococcal antigen test (looks for a certain molecule that the cryptococcus fungus can shed.