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West Nile Virus

West Nile Virus. Nicholas McDonald. What is West Nile Virus?. A potentially serious illness caused by an arbovirus transmitted primarily by mosquitoes. History. 1937 isolated in an adult woman in Uganda 1950’s ecology characterized in Egypt

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West Nile Virus

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  1. West Nile Virus Nicholas McDonald

  2. What is West Nile Virus? • A potentially serious illness caused by an arbovirus transmitted primarily by mosquitoes.

  3. History • 1937 isolated in an adult woman in Uganda • 1950’s ecology characterized in Egypt • 1957 identified as a cause of human meningitis and encephalitis during an outbreak in Israel • 1960’s equine disease identified in Egypt and France • 1999 first case identified in New York in the United States • 2012 identified in some form in all 48 contiguous US States

  4. Signs and Symptoms • Serious Symptoms: 1 in 150 develop high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis. • Milder Symptoms: 20% develop fever, headache, and body aches, nausea, vomiting, and sometimes swollen lymph glands or a skin rash on the chest, stomach and back. • Some show no symptoms at all.

  5. Transmission

  6. Distribution and Control • Some incidence of disease in all 48 contiguous States. • Control through spraying of mosquitoes and avoidance.

  7. Works Cited • CDC: http://www.cdc.gov/ncidod/dvbid/westnile/index.htm • NIH: http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0004457/ • PA West Nile Virus Control Program: http://www.westnile.state.pa.us/

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