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West Nile Virus. Timeline. 1937 First Case reported 1950 Virus studied in Egypt 1957 Outbreak in Israel 1960 Equine cases 1999 Appeared in US. World Wide. Africa West Asia Eastern Europe Middle East United States. New York. 1999 62 Human cases 7 deaths 2000 21 Human cases

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Presentation Transcript
timeline
Timeline
  • 1937
    • First Case reported
  • 1950
    • Virus studied in Egypt
  • 1957
    • Outbreak in Israel
  • 1960
    • Equine cases
  • 1999
    • Appeared in US
world wide
World Wide
  • Africa
  • West Asia
  • Eastern Europe
  • Middle East
  • United States
new york
New York
  • 1999
    • 62 Human cases
    • 7 deaths
  • 2000
    • 21 Human cases
    • 2 deaths
  • Numerous bird (crow) causes
positive states
Connecticut

Indiana

Ohio

Maryland

Pennsylvania

Florida

Virginia

Massachusetts

New Hampshire

New Jersey

New York

Rhode Island

Georgia

Positive States
transmission of wnv
Transmission of WNV
  • Birds are reservoirs
  • Mosquitoes are Vectors
  • Humans and horses are incidental hosts
  • No horizontal spread of WNV from humans to horses
slide7

Bird

Mosquito

HorsesHumans

mild infection symptoms
Mild Infection Symptoms
  • Symptoms occur abut 5-15 days after mosquito bites
  • Mild fever
  • Headache
  • Body aches
  • Rash
  • Swollen lymph nodes
serious infection symptoms
Seen mostly in elderly

Less than 1% of infected develop into severe illness

Causes encephalitis (inflammation of the brain)

Rapid onset of severe headache

High fever

Stiff neck

Confusion

Coma

Muscle weakness

Serious Infection Symptoms
diagnosis
Diagnosis
  • Testing
    • Done if person develops symptoms
    • Medical history first assessed
      • People who live in or have traveled to areas where WNV has been identified are at high risk
      • People over 50 are at high risk
diagnosis1
Diagnosis
  • Blood Sample
    • Drawn and taken to commercial or public health laboratory for conformation
    • IgM antibodies tested in serum or cerebral spinal fluid
    • ELISA test
      • Used to incubate goat IgM and human serum and test it with WNV antigen from vero cells infected from gulls mice and goats
treatment
Treatment
  • No treatment
  • Can treat secondary symptoms with fluids
  • Need to seek medical attention immediately
    • Doctor
    • Veterinarian
prevention
Prevention
  • Eliminate outdoor activities between dusk and dawn
  • Wear protective clothing
  • Use mosquito repellant
  • Keep pools treated
  • Empty and clean birdbaths, plant trays once a week
prevention1
Prevention
  • Replace outdoor lights with yellow lights
  • Report dead birds to proper authority
  • Vaccinate horses against WNV
  • Make sure screens are bug tight
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