L12: Intergrated Vet Med Review

Question 1

how many nymphal stages do soft ticks have

Answer 1

2 or more

Question 2

how many nymphal stages do hard ticks have

Answer 2

1

Question 3

how fast/often do soft ticks feed? what about hard ticks?

Answer 3

soft ticks - fast and repeated
hard ticks - once slowly (F) or repeated fast (M)

Question 4

are hard or soft ticks nidicolous

Answer 4

soft ticks - nidicolous (stay around burrow)
hard ticks - non nidicolous (can be found in open field)

Question 5

Babesiosis is?

Answer 5

Cattle fever

Question 6

what ticks cause Cattle Fever (Babesiosis)

Answer 6

Rhipicephalus microplus (Southern cattle tick)
Rhipicephalus annulatus (cattle tick)

Question 7

what tick causes Pink brain

Answer 7

Rhipicephalus microplus
discoloration of the brain due to distension of blood vessels w/ parasitized erythrocytes that increase attachment factors causing red cells to clump together

Question 8

Dermacentor albipictus

Answer 8

winter tick - affects moose causing hair and blood loss
one host tick

Question 9

what is the host of the soft tick Ornithodoros spp

Answer 9

mainly mammals

Question 10

what does Ornithodoros spp vector

Answer 10

Epizootic bovine abortion
“foothill abortion”
causes late term abotion, chronic fetal disease, weak calves

Question 11

Ixodes, Ambylomma, Dermacentor and Rhipicephalus are all _____ ticks

Answer 11

hard (Ixodidae)

Question 12

what makes ticks good vectors

Answer 12

• blood feeders
• wide host range
• long lived
• few natural predators
• high reproductive potential
• pathogen can be maintained in tick population

Question 13

What causes pink brain, icterus, and splenomegaly in cattle?

Answer 13

Babesia bovis

Question 14

What species of ticks is described?

• Hosts: mainly mammals
• Leathery cuticle
• Round body margin
• Vector for Borrelia spp., epizootic bovine abortion

Answer 14

Ornithodoros

Question 15

What species of tick is described?
- most common tick in AZ
- major vector for Rocky Mountain Spotted Fever

Answer 15

Rhipicephalus sanguineus
Brown Dog Tick

Question 16

Rickettsia rickettsii

Answer 16

rocky mountain spotted fever

Question 17

Vector: *Dermacentor andersoni *in western US
Causative agent: Anaplasma marginale, A. centrale
Causes: hemolytic anemia, fever, depression, anorexia, 50% mortality in adults.

Answer 17

Bovine Anaplasmosis

Question 18

vector: Ambylomma maculatum (Gulf Coast Tick)
unqiue transmission: ingest infected tick or ingest paratenic host
Causes: fever, weakness, leuocytosis “onion skin”

Answer 18

American Canine Hepatozoonosis
Hepatozoon americanum

Question 19

vector: Ambylomma americanum & Dermacentor variabilis
transmitted by tick bite
affect cats

Answer 19

Cytauxzoon felis
Cytauxzoonosis

Question 20

Tick paralysis is caused by salivary _______ which inhibit the release of ______ from axon terminal

Answer 20

neurotoxin
ACh

Question 21

uncommon, noninfectious neurologic syndrome characterized by acute ataxia that progresses to ascending paralysis

Answer 21

Tick paralysis

Question 22

what was the first ever described vector borne disease

Answer 22

Rocky Mountain Spotted Fever

Question 23

parasite that causes equine stomach bot

Answer 23

Gasterophilius intestinalis

Question 24

cuterebra larval migration in cats can lead to..

Answer 24

neurological issues and death
- feline ischemic encephalopathy
- multifocal cerebral hemorrhage

Question 25

most common ectoparasite of dogs/cats in North America

Answer 25

Ctenocephalides felis (Cat flea)

Question 26

what are the main differences b/w heartworm disease in dogs vs cats

Answer 26

dogs - high susceptibility, microfilaremia common, heart is primarily affected

cats - low susceptibility, microfilaremia uncommon, lungs are primarily affected