Arbo - WNV Flashcards
Enzootic Vector
Culiseta meanura
Brdige vector
Coquiiettida perturbans
Main Epizootic Vector
Culex
WNV Types
Type II - Africa - Low Path
Type I - US - High Path
Enzootic Reservoir
Songbird
Susceptible birds
Corvids
Mortality in hosts
Bats, rabbits, chipmunks, squirrels, horses, alpaca, cats, dogs
Seropositive only
Dogs, bears, sheep, goats, wolfs
Subclinical ratio
1:9
Serious manifistations %
Ataxia - 86
Depression - 51
Hindlimb weakness - 49
Rising - 46
Tremors - 41
Fever only - 24
Death - 25 - 33
Neurological Lesions
Brain stem
-Spinal cord ataxia
-Hypersthesia
-Muscle fasiculations
Behavior changes
Nonresponsive
Somnolence
Seizures
Colorado Study
Recovery - 82%
Residual - 21%
Unreported rate
2/3
Florida study
Residual - 15%
Follow up - 6 months
Neurologic - 60%
Duration - 35 days