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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]
What else can I help you with?
Which body systems are affected by encephalitis?
The brain
What part of the nervous system is affected if there's encephalitis?
The CNS
What part of body can be affected by lunbago?
The part of you body which can get affected by a lumbago is you lower back of your body!
When does primary encephalitis occur?
Primary encephalitis can happen to people at any time of the year (sporadic encephalitis), or can be part of an outbreak (epidemic encephalitis).
Which part or the body is NOT affected by tobacco?
it effects the whole body
Which part of the body part is affected by aids?
Basically all of it.
Who should get the Japanese encephalitis vaccine?
Japanese encephalitis vaccine is recommended for those traveling to Asia and staying in affected rural areas during transmission season
What part of the body affected by atherosclerosis?
arteries
Which part of the body is affected by conjunctivetis?
your eyes.
What part of body is affected by jaundice?
liver
Which part of the body is NOT affected by tobacco?
Tabbaco effects the whole body
What is prenatal encephalitis?
Primary encephalitis is caused by direct infection by the virus, while secondary encephalitis is due to a post-infectious immune reaction to viral infection elsewhere in the body
