TY - CHAP M1 - Book, Section TI - Cryptococcal Infections A1 - Raffanti, Stephen P. A1 - Person, Anna K. A2 - Knoop, Kevin J. A2 - Stack, Lawrence B. A2 - Storrow, Alan B. A2 - Thurman, R. Jason PY - 2021 T2 - The Atlas of Emergency Medicine, 5e AB - Cryptococcus neoformans is the most common cause of meningitis in patients with HIV/AIDS. Cryptococcal meningoencephalitis typically manifests itself in patients whose CD4 cell counts are less than 50/mm3. The onset tends to be insidious with fairly nonspecific symptoms such as fever, nausea, and headache. Symptoms may be present for several weeks, and diagnostic delay is common. Seizures or focal neurologic presentations are rare, and neck stiffness and/or photophobia are usually absent. Diagnosis is usually made on examination of cerebrospinal fluid (CSF). Opening pressures may be quite elevated on LP, and CSF values usually reveal a normal CSF glucose concentration, a mildly elevated CSF protein concentration, and a CSF leukocyte count of less than 20/mL. India ink staining shows the organisms directly with an approximate sensitivity of 70%, whereas CSF cryptococcal latex antigen testing has a sensitivity approaching 90%. Fungal CSF cultures should also be sent. Cutaneous manifestations are seen in disseminated disease. SN - PB - McGraw-Hill CY - New York, NY Y2 - 2024/04/23 UR - accessemergencymedicine.mhmedical.com/content.aspx?aid=1181057388 ER -