What is a Cryptococcus Antigen, CSF?

The **Cryptococcus Antigen, CSF test** is a diagnostic procedure that detects antigens from *Cryptococcus neoformans* or *Cryptococcus gattii* in cerebrospinal fluid (CSF). It is primarily used to diagnose cryptococcal meningitis, a serious fungal infection that affects the brain and spinal cord, especially in immunocompromised patients such as those with HIV/AIDS. By identifying cryptococcal antigens directly in CSF, the test provides rapid and reliable confirmation of infection, enabling timely treatment and reducing the risk of severe neurological complications.