Lecture 11: Ectoparasites

Question 1

which tick is a 1 host tick: generic and scientific name

Answer 1

otobius megnini = spinose ear tick

Question 2

soft vs hard ticks: number of nymphal stages, how often/fast do they feed, number of hosts, number of times female lays eggs

Answer 2

soft = more than 2 stages, fast/repeated feeding, multiple hosts, female lays hundreds of eggs many times
hard = 1 nymphal stage, feed once slowly if female, can have 1/2/3 hosts, female lays thousands of eggs once

Question 3

nidicolous pertains to: hard or soft tick?

Answer 3

soft

Question 4

soft ticks prefer what kind of environment

Answer 4

arid

Question 5

hard ticks prefer what kind of environment

Answer 5

humid

Question 6

bovine babesiosis: general tick genus that causes, clinical sign on histopathology post mortem

Answer 6

rhipicephalus
pink brain

Question 7

2 host tick cycle

Answer 7

egg hatches –> larvae feeds on host 1 –> remain on host and most to nymph –> nymph feeds on host 1 THEN FALLS OFF –> molts to adult off host –> adults feeds/mates on host 2 THEN DROPS OFF –> lays eggs and dies off host

Question 8

most hard ticks have what kind of life cycle

Answer 8

3 host tick

Question 9

3 host tick cycle

Answer 9

egg hatches –> larvae feeds on host 1 –> larvae drops off and molts to nymph off host –> nymph feeds on host 2 then drops off –> nymph molts to adult off host –> adult feeds/mates on host 3 then drops off -=-> lays eggs, dies off host

Question 10

epizootic bovine abortion: vector, causative agent, cause, generic name, geographic location

Answer 10

ornithodoros coriaceus (soft tick/argasidae)
pajaroellobacter abortibovis
late term abortion, fetal disease, weak calves
foothill abortion
foothill regions of california

Question 11

argasidae/ornithodoros species are vector for what disease

Answer 11

epizootic bovine abortion

Question 12

major vector for rocky mountain spotted fever in ARIZONA: scientific and generic name

Answer 12

brown dog tick
rhipicephalus sanguineus

Question 13

most common tick throughout arizona

Answer 13

brown dog tick
rhipicephalus sanguineus

Question 14

bovine anaplasmosis: vector

Answer 14

dermacentor andersoni

Question 15

american canine hepatozoonosis: vector, unique transmission

Answer 15

amblyomma maculatum
gulf coast tick
ingest infected tick OR paratenic host that ingests tick

Question 16

cytauxzoonosis/cytauxzoon felis: vectors (2)

Answer 16

amblyomma americanum
dermacentor variabilis

Question 17

tick paralysis is similar to

Answer 17

botulism

Question 18

4 main flies within nematocera

Answer 18

mosquitos
biting midges
black flies
sand flies

Question 19

6 flies within brachycera

Answer 19

myiasis flies = bot, blow, flesh
stable flies
horn flies
keds/louse flies
horse flies
deer flies

Question 20

equine stomach bot: scientific name

Answer 20

gasterophilus intestinalis

Question 21

leishmaniosis: vector species

Answer 21

sandflies = lutzomyia and phlebotomus

Question 22

which specific leishmania species is most common in dogs

Answer 22

L. infantum

Question 23

is leishmaniosis common in cats

Answer 23

no

Question 24

heartworm disease in dogs vs cats: level of susceptibility, how long adult worms live, how many worms are infected, how common are single sex infections, are microfilaria common (and how long they live), primary organ of concern

Answer 24

dogs = high susceptibility, 5-7 years, 30 worms, unusual, common and live 1-2 years, heart
cats = low susceptibility, 2-4 years, less than 6 worms, common, microfilaria uncommon (1 month), lung

Question 25

most common ectoparasite of dogs and cats in north america

Answer 25

ctenocephalides felis (cat flea)

Question 26

red fox with severe pruritus most likely has

Answer 26

sarcoptes scabiei

Question 27

do male or female ticks cause toxicosis/paralysis

Answer 27

females

Question 28

argas persicus: type of tick, generic name

Answer 28

soft tick = argasidae
fowl tick or blue bugs

Question 29

yersinia pestis and dipylidium caninum are vectored by what major ectoparasite

Answer 29

fleas