VBS 1 Parasitology

Question 1

Dermacentor variabillis
(American Dog Tick)

Answer 1

Capitulum rectanglar, scutum ornamented, short mouth, posterior anal groove, has festoons

Transmits: Borrelia burgdorferi (Lyme), Rocky Mountain spotted fever, St. Louis encephalitis virus
*Can cause tick paralysis

Question 2

Amblyomma -
americanum (Lone Star)
maculatum (Gulf coast)
variegatum (Bont tick)

Answer 2

capitulum short, scutum ornamented, long mouth, has festoons

Transmits: Cytauxzoon felis

*Americanum transmits: Borrelia burgdorferi (Lyme)
*Can cause tick paralysis

Question 3

Ixodes
(Blacklegged tick or Deer tick)

Answer 3

hard tick - scutum not ornamented, long mouth, no festoons

Transmits: Borrelia burgdorferi (Lyme), Anaplasma, +some human stuff

Question 4

Rhipicephalus sanguineus
(Brown Dog tick or Kennel tick)

Answer 4

capitulum hexagonal, scutum not ornamented, has festoons

Transmits: Babesia canis, Ehrlichia canis
*Can cause tick paralysis

Question 5

Rhipicephalus annulatus
(Boophilus annulatus)
(Texas cattle fever tick or Blue Cattle tick)

Answer 5

capitulum hexagonal, scutum not ornamented, NO festoons (Remember - sanguineus does)

Transmits: bovine piroplasmosis (Texas Cattle Fever)
*must be reported in the US lol

Question 6

Haemaphysalis
(Rabbit tick or Yellow Dog tick)

Answer 6

scutum not ornamented, has festoons

minor importance in North America

Question 7

Neospora caninum

Answer 7

Coccida!
Intermediate hosts: cattle, sheep, goat
Final host: dog

Dog becomes infected when ingests bradyzoites or tissue cysts
- most severely affected in transplacentally

-progressive ascending paralysis (particularly hind limbs)
- gray matter most severely affected

Question 8

Toxoplasma gondii

Answer 8

Coccidia!

Sporulated oocysts infective on ingestion

Question 9

No-see-um flies
(Ceratopogonidae)

Answer 9

Also called biting midges

Vectors for more than 50 arboviruses !!!!
- (Ex. Eastern Equine Encephalitis, Bluetongue in sheep, African horse sickness)