Encephalopathies are disorders or diseases of the brain. In modern usage, encephalopathy does not refer to a single disease, but rather to a syndrome of global brain dysfunction which can be caused by many different illnesses. In this book, the authors discuss the symptoms, causes, and potential complications relating to encephalitis, encephalomyelitis and encephalopathies. Topics include HIV-1 associated neurocognitive disorder; nonconvulsive status epilepticus; the implications of sensitization for chronic fatigue syndrome; treatment of tick-borne encephalitis; the immunology of encephalomyelitis; neuromyelitis optica; viral encephalopathy and retinopathy in farmed fish; septic encephalopathy; and Japanese encephalitis.