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nouninflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (`phrenitis' is no longer in scientific use)
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Definition that contains encephalitis
- west nile encephalitis encephalitis caused by the West Nile virus; can be fatal in humans and horses and birds
- acute hemorrhagic encephalitis encephalitis that resembles apoplexy due to blood extravasation
- equine encephalitis encephalitis caused by a virus that is transmitted by a mosquito from an infected horse
- equine encephalomyelitis encephalitis caused by a virus that is transmitted by a mosquito from an infected horse