Arboviruses

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  1. Western Equine encephalitis
    • Alphavirus (togavirus)
    • Western US
    • Encephalitis (1/1000 adults, 1/25 children < 1)
    • Mild, non-specific -> Asceptic meningitis -> encephalitis
  2. Eastern Equine Encephalitis
    • Atlantic Seaboard
    • Restricted mostly to animals
    • Severe Encephalitis
    • Children most affected
  3. St Louis Encephalitis
    • Flavivirus
    • Major cause of Arbovirus encephalitis in US
    • Vector: Culex Tarsalis
    • Adults > 40 yrs
    • Similar to western equine
  4. Yellow Fever
    • Flavivirus
    • Carribean, CA, SA
    • Threat to south due to urban vector
    • Abrupt onset of fevet, chills, headache, hemorrhage
    • Severe vomiting, bradycardia, jaundice, shock
  5. Dengue
    • Flavivirus
    • Fever, erythematous rash, severe back and joint pain
    • Severe form in far east - shock, hemorrhage, death
    • Usually imported in US
  6. Japanese encephalitis
    • Flavivirus
    • East coast of Asia, India
    • Usually subclinical
    • Ecephalitis -> severe, usually fatal
  7. West Nile
    • Flavivirus
    • Incubation: 2-6 days
    • Asymptomatic, west nile fever, west nile disease
    • Fever, headache, backache, myalgia
    • Rash in 50% of cases
    • 3-6 day course
    • West nile disease: headache, high fever, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, paralysis
    • DX: serology
  8. Chikungunya
    • Alphavirus, Togavirus
    • Abrupt fever, excruciating myalgia, polyarthritis
    • Symptoms last one week, myalgia for months
  9. California Virus
    • Bunya virus
    • Midwest distribution
    • 5-18 years of age
    • abrupt onset of encephalitis with seizures
  10. Hanta
    • Bunya Virus
    • Varying rates of renal failure
    • Fulminant respiratory disease with high mortality
    • inhalation, direct contact with skin breaks
    • Ribavirin may be helpful
  11. Colorado Tick Fever
    • Reovirus
    • Tick borne
    • Western US
    • 3-6 days after tick bite
    • Sudden onset of headache, muscle pain, fever, and encephalitis
  12. Arena Virus
    • Transmission: small rodents
    • Aerosol, close contact
    • Disease: fever, shock, hemorrhage
    • Junin, Machupa, Lassa
    • Complications: hepatitis, myocarditis

Card Set Information

Author:
 ehamm
ID:
 113847
Filename:
 Arboviruses
Updated:
2011-11-06 18:04:03
Tags:
Vector borne viruses
Folders:

Description:
Vector borne viruses
Show Answers:

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