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WNV has three different effects on humans. The first is an asymptomatic infection; the second is a mild febrile syndrome termed West Nile Fever;[1] the third is a neuroinvasive disease termed West Nile meningitis or encephalitis.[2] In infected individuals the ratio between the three states is roughly 110:30:1.[3]
The second, febrile stage has an incubation period of 3-8 days followed by fever, headache, chills, diaphoresis, weakness, lymphadenopathy, and drowsiness. Occasionally there is a short-lived truncal rash and some patients experience gastrointestinal symptoms including nausea, vomiting, loss of appetite, or diarrhea. All symptoms are resolved within 7-10 days, although fatigue can last for some weeks and lymphadenopathy can take up to two months to resolve.
The more dangerous encephalitis is characterized by similar early symptoms but also a decreased level of consciousness, sometimes approaching near-coma. Deep tendon reflexes are hyperactive at first, later diminished. There are also extrapyramidal disorders. Recovery is marked by a long convalescence with fatigue.
More recent outbreaks have resulted in a deeper study of the disease and other, rarer, outcomes have been identified.The spinal cord may be infected, marked by anterior myelitis with or without encephalitis.[4] WNV-associated Guillain-Barré syndrome has been identified[5] and other rare effects include multifocal chorioretinitis (which has 100% specificity for identifying WNV infection in patients with possible WNV encephalitis)[6] hepatitis, myocarditis, nephritis, pancreatitis, and splenomegaly.[7][8][9]
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoSymptoms include drowsiness, severe frontal headache, maculopapular rash, abdominal pain, loss of appetite, nausea and generalised lymphadenopathy.
Thus body systems would include cardiovascular (carried in the blood), nervous system (brain), Integumentary system (skin), digestive system (nausea, pain and appetite loss), and the lymphatic system (lymphadenopathy which is basically a pain or enlargement of the lymph nodes).
Wiki User
∙ 15y agoThe brain. It is an inflamation of the brain.
Wiki User
∙ 11y agoArms
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Which body systems are affected by encephalitis?
The brain
What part of the nervous system is affected if there's encephalitis?
The CNS
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