Encephalitis - Encephalitis Definition inflammation of the...

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Encephalitis Definition inflammation of the brain parenchyma that is most commonly of viral origin Etiology Caustative viruses: herpes simplex virus, epstein-barr virus, varicella-zoster virus, cytomegalovirus, west nile virus, arbovirus (spread by mosquito and tick bites), and rabies virus (spread by animal bites), enterovirus, hepatitis C The causative virus commonly replicates outside the CNS and then invades the CNS either by hematogenous spread or by traveling along neuronal pathways. Once the virus crosses the blood-brain barrier the virus enters the neural cells and causes disruption in cell functioning, perivascular congestion, hemorrhage, and inflammatory response diffusely affecting gray matter more so than white matter Signs & Symptoms Prodrome lasting several days of: fever, headache, nausea, vomiting Behavioral or personality changes, decreased level of consciousness stiff neck photophobia lethargy generalized or localized seizures
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Encephalitis - Encephalitis Definition inflammation of the...

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