Correspondence High Levels of Adenosine Deaminase in a Patient with

Sir—The finding of high levels of aden-osine deaminase (ADA) in CSF samples may be an important diagnostic clue for tuberculous meningitis [1]. We describe a young patient with herpes simplex en-cephalitis (HSE) and very high levels of ADA in the CSF. In a MEDLINE (Pub-Med) search of the literature published in the last 15 years, we did not find another case report of high levels of ADA in the CSF of patients with HSE. A 25-year-old butcher was admitted to our hospital (Hospital Universitario Vir-gen de las Nieves, Granada, Spain) with a 2-day history of fever, lethargy, headache