Lecture 10: Integrated Vet Medicine Review

Question 1

What is the Haller’s Organ

Answer 1

Sensory organ possessed by hard and soft ticks. Senses humidity, temperature, carbon dioxide and pheromones

Question 2

Soft or hard ticks:
>2 nymphal stages, fast feeding, multiple hosts, many oviposits

Answer 2

Soft

Question 3

Soft or hard ticks: 1 nymphal stage, slow feeding, feed once, 1-3 hosts, one oviposit

Answer 3

Hard

Question 4

Hard or soft ticks: Nidicolous

Answer 4

Soft

Question 5

Hard or soft ticks: non-Nidicolous

Answer 5

Hard

Question 6

What is the 1 host hard tick life cycle

Answer 6

Egg hatches to larvae and larvae attaches to host. Larvae molts to nymph then to adult, feeds and mates then drops off, lays eyes and dies

Question 7

What two ticks cause bovine babesios

Answer 7

Rhipicephalus microplus and rhipicephalus annulatus

Question 8

What does bovine babesios do to the brain

Answer 8

Results in pink brain due to blood vessel distention due to parasitized RBC’s

Question 9

What is the hard tick life cycle with 2 hosts

Answer 9

Egg hatches to larvae, larvae goes to 1st host, feeds and molts to nymph, nymph then drops off to molt to adult

Adult feeds and mates on second host
Drops off, lays eggs and dies

Question 10

What is the 3 host hard tick life cycle

Answer 10

Larvae attaches to first host then drops off to molt into nymph

Nymph feeds on second host then drops off to molt into adult

Adult feeds and mates on second host then falls off lays eggs and dies

Question 11

What are the important genera of soft (Argasidae) ticks

Answer 11

Argas, ornithodoros, and otobuis

Question 12

What are the important genera of hard (ixodidae) ticks

Answer 12

Rhipicephalus, Ixodes, amblyomma, and dermacentor

Question 13

What is the host for ornithodoros

Answer 13

Most mammals

Question 14

What argasidae has a leathery cuticle and rounder body margin

Answer 14

Ornithodoros

Question 15

What tick spreads epizootic bovine abortion (pajaroellobacter abortibovis)

Answer 15

Ornithodoros coriaceus

Question 16

what type of tick is this

Answer 16

Ornithodoros

Question 17

What ticks cause tick paralysis

Answer 17

Dermacentor variabilis, dermacentor andersoni, amblyomma americanum, and Ixodes scapularis

Question 18

Why are ticks good vectors

Answer 18

Blood feeders, wide host range, long-lived, few predators, high reproductive potential

Question 19

What tick is a major vector for RMSF, especially in Arizona

Answer 19

Rhipicephalus sanguineus (brown dog tick)

Question 20

What tick is a vector for bovine anaplasmosis

Answer 20

Dermacentor andersoni

Question 21

What are some clinical signs for bovine anaplasmosis

Answer 21

Hemolytic anemia, fever, depression, anorexia

Question 22

What is the vector for Hepatozoon americanum

Answer 22

Amblyomma maculatum

Question 23

How can Hepatozoon americanum be transmitted

Answer 23

Ingest infected tick, paratenic host

Question 24

What disease and vector cause neutrophilic leukocystosis, periosteal bone proliferation, onion skin cyst, and gamont in WBC

Answer 24

Disease: Hepatozoon americanum
Vector: amblyomma maculatum

Question 25

What are the two possible vectors for cytauxzoono Felis

Answer 25

1. Amblyomma americanum 2. Dermacentor variabilis

Question 26

What is the reservoir species for cytauzoon Felis

Answer 26

Bobcat

Question 27

What causes tick paralysis

Answer 27

Salivary neurotoxin that inhibits the release of Ach

Question 28

What type of botfly is found in the non-glandular stomach of horses

Answer 28

Gasterophilus intestinalis

Question 29

What type of botfly is found in the pylorus/duodenum of horses

Answer 29

Gasterophilus nasal is

Question 30

In what type of botfly can cause multifocal cerebral hemorrhage and feline ischemic encephalopathy in cats

Answer 30

Cuterebra spp.

Question 31

What is the most common form of cutaneous leishmaniasis in dogs

Answer 31

Leishmania infantum

Question 32

What is the vector for Leishmania

Answer 32

Sandflies

Question 33

What type of Nematocera are intermediate hosts for heart worm

Answer 33

Mosquitoes- anopheles, aedes, and culex

Question 34

What stage of D. Immitis migrates to pulmonary arteries and right heart

Answer 34

Adults

Question 35

Who is more susceptible to heartworm, dogs or cats

Answer 35

Dogs

Question 36

Are microfilariae more common in cats or dogs

Answer 36

Dogs

Question 37

What is the organ of primary concern in dogs with D. Immitis

Answer 37

Heart

Question 38

What is the organ of primary concern in cats with D. Immitis

Answer 38

Lungs

Question 39

What is the most common ectoparasite of dogs and cats in N. America

Answer 39

C. Felis

Question 40

What type of flea is this

Answer 40

C. canis **can differentiate from C. Felis because genial comb is shorter than pronotal comb In C. Felis they are the same length

Question 41

What type of flea is this

Answer 41

C. Felis - genal and pronotal comb are same length

Question 42

What type of mite is this

Answer 42

demodex