Encephalitis Encephalitis is an acute inflammation of the brain 7. 4 cases per 100, 000 population in Western countries, 6. 34 per 100, 000 population and tropical countries per year. Common symptoms include headache, fever, confusion, drowsiness, and fatigue with more serious symptoms ranging from seizures/convulsions tremors, hallucinations, and memory problems. Several common causes of encephalitis are the Japanese encephalitis virus, the West Nile virus and cryptococcus neoformansEncephalitis Encephalitis is an acute inflammation of the brain. 7.4 cases per 100,000 population in Western countries, 6.34 per 100,000 population and tropical countries per year. Common symptoms include headache, fever, confusion, drowsiness, and fatigue with more serious symptoms ranging from seizures/convulsions, tremors, hallucinations, and memory problems. Several common causes of encephalitis are the Japanese encephalitis virus, the West Nile Virus, and Cryptococcus neoformans. • • • •