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West Nile Virus (WNV) Symptoms Include Fever Nausea Muscle Weakness and More - List of States Where Human Infections Are Located

July 7th 2006

West Nile Virus (WNV) Symptoms Include Fever Nausea Muscle Weakness and More - List of States Where Human Infections Are Located


This is the beginning of West Nile Virus (WNV) season and human cases have been identified in Idaho, Texas, Colorado and Mississippi.  Cases involving other animals have been identified in most of the other states. 

The West Nile Virus could be considered a new phenomenon.  It was first discovered in a febrile adult woman in the West Nile District of Uganda in 1937.  Later it became apparent the virus was responsible for severe meningitis and encephalitis in elderly patients in Israel in 1957.  Since then it has spread throughout Africa, Europe, the Middle East, west and central Asia, Oceania (subtype Kunjin), and most recently, North America.


There is a danger of dying from the disease, but this is rare.  Most people that contract it donít even realize they have it.  The Centers for Disease Control (CDC) says that only one in 150 people infected with WNV will develop severe illness.

Severe symptoms can include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis.  The symptoms could last for several weeks and the neurological effects may be permanent (see a survivors story).


About 20 percent of those infected will have a fever, headaches and body aches, nausea, vomiting and sometimes swollen lymph glands.  Some people may get skin rashes.  About 80 percent of those infected will have no symptoms.  Symptoms will develop between 3 and 14 days after the infection.  If the symptoms include severe headaches or confusion, seek medical attention immediately.

The season will last through the summer and into the fall.  Insect repellants containing DEET (N, N-diethyl-meta-toluamide) are effective.  It is best to avoid the outdoors from dusk to dawn.  Also remove or change water weekly from bird baths, tires, swings etc.

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Dan Wilson
Best Syndication

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Important:  The material on Best Syndication is for informational purposes only and is not a substitute for medical advice or treatment for any medical conditions. You should promptly seek professional medical care if you have any concern about your health, and you should always consult your physician before starting a fitness program.

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