Varicella zoster virus encephalitis with extreme CSF lactate and protein unmasking Alzheimer's disease

[...]the results of CSF with severe elevation of protein (>6000mg/l) and lactate (nearly 6mmol/l) strongly suggested an infective cause such as neuroborreliosis or -syphilis, bacterial or fungal meningitis or tuberculosis, diseases which were all excluded in our patient by specific tests. [...]the index symptom "headache" and discomfort induced neurological diagnostic procedures, which finally detected, besides VZE, marked findings of hitherto undiagnosed Alzheimer's disease.