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31 Cards in this Set

  • Front
  • Back
Flavivirus
West Nile Virus

St. Louis Encephalitis Virus
True or False

WNV serologic tests cross react with EEE virus
False

WNV cross reacts with St. Louis Encephalitis Virus
True or False

WNV cross reacts with SLE virus serologic tests
True
What is the primary vector of

1. WNV
2. SLE Virus
3. EEE Virus
4. WEE Virus
5. VEE Virus
6. LACV
1. Culex spp (also Aedes, Anopheles, and others)
2. Culex spp
3. Culiseta melanura
4. Culex tarsalis
5. mosquito
6. Aedes triseriatus (eastern treehole mosquito)
Who shows disease with WNV
humans

horses

birds
#1 cause of arboviral dz in US
WNV
(flavivirus)
what are amplifiers
hosts with high viral load

may not be symptomatic
1. who are the carriers of WNV

2. who are the vectors

3. case fatality rate in horses
1. song birds

2. Culex spp primarily (also Aedes spp, Anopheles spp, and others)

3. 30% (not too bad)
Describe WNV in birds
corvids (crows/ ravens/ jays)
- highest fatility

Raptors
- owls have high mortality rate
- retinal lesions

chickens/ other birds used as surveillance
West Nile Virus
Know WNV distribution
St Louis Encephalitis Virus Neuroinvasive Cases
Know SLEV distribution
Know EEE distribution
Eastern Equine Encephalitis distribution
Know Arboviruses and their vectors/ reservoirs/ illness (humans and animals)/ geography
Which arbovirus has a very high (90%) case fatality rate in horses
EEE
(Togavirus)
Small rodents are the main vector for which virus/viruses
La Cross Encephalitis (bunaya)

Venezuelan equine encephalitis
horses with ______ should be quarantined
VEE
Which can you vax for
EEE
- annually (or more often)
- 3-4 wks prior to foaling
- 3, 4, & 6 mo

EEE

VEE

WNV
which virus is associated with careless irrigation
WEE
Culiseta melanura is the vector for _______
EEE
which affect humans only
SLEV (flavi)

LACV
A horse is presented with signs of encephalitis in TX.

Which virus(es) are on your ddx
WEEV (seen anywhere west of miss river)

VEEV (rare)

WNV

NOT SLEV B/C ONLY HUMANS AFFECTED
A horse in Florida is showing signs of encephalitis.

What virus(es) are on your ddx
WNV

EEE

VEE (rare)

not LACV (b/c only humans affected)
A human living in Indiana is showing signs of encephalitis

which virus(es) are on your ddx
SLEV

WNV

WEE
a child in south carolina is showing signs of encephalitis.

which virus(es) are on your ddx
LACV

WNV

EEE
Culex tarsalis is the vector of
WEE
Culiseta melanura is the vector of
EEE (Toga)
Which virus is transmitted by a vector which feeds exclusively on birds but will move to forested areas in the late summer/ fall.
EEE (toga)

culiseta melanura is the spp
when do cases of EEE occur (time of year)
late summer/ fall

b/c mosquito (culiseta melanura) moves from swamps to forested areas