MS-1727

A 35-year-old woman presents to the emergency department with seizures. She reports experiencing headaches, nausea, vomiting, and fevers for the past week. She was diagnosed with HIV 3 years ago but has been noncompliant with her medication due to forgetfulness. On lumbar puncture, her CSF shows a high opening pressure and India ink staining. A head CT reveals cerebral edema.

What is the probable cause of her symptoms?