togaviridae

Question 1

togaviridae general characteristics

genetic material

enveloped?

viruses

Answer 1

ssRNA

enveloped

western equine encephalitis, eastern equine encephalitis, venezuelan equine encephalitis

*arbovirus- transmitted by arthropod

Question 2

Western equine encephalitis

1. types of dz virus causes
2. method of transmission
3. zoonotic?
4. does it change/recombine/mutate
5. distribution
6. diagnosis
7. differential diagnosis
8. control

Answer 2

1. subclinical to severe neurol dz
2. via biting insect. replicates in CNS, NOT viremic.
   - birds amplify virus
   - man/horse are dead end hosts
3. YES
5. western us and canada
6. virus isolation via brain tissue, HI, SN, IHC via brain tissue
7. eee, vee, herpes?
8. vaccinate, vector control

Question 3

Eastern equine encephalitis (EEE)

1. types of dz virus causes
2. method of transmission
3. zoonotic?
4. does it change/recombine/mutate
5. distribution
6. diagnosis
7. differential diagnosis
8. control

Answer 3

1. neurological, fever, depression, anorexia, head hanging, drooling, paresis
2. biting arthropod.
3. zoonotic
5. eastern US
6. virus isolation (brain), IHC (brain)
7. WEE, VEE
8. vacinate, control mosquitoes, colostrum

Question 4

VEE

1. types of dz virus causes
2. method of transmission
3. zoonotic?
4. does it change/recombine/mutate
5. distribution
6. diagnosis
7. differential diagnosis
8. control

Answer 4

1. neurological, anorexia, depression, wide based stance, head hanging, paresis
2. arthropod
3. zoonotic
5. south and central america
6. ihc, virus isolation, serum?
7. wee/eee
8. no vac?