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Parasitology > Integrated Vet. Medicine > Flashcards

Integrated Vet. Medicine Flashcards

1
Q

how many legs do larvae have?

A

6

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2
Q

how many legs do nymphs have?

A

8

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3
Q

what is a haller’s organ?

A

sensory organ in hard and soft ticks - senses humidity, temperature, carbon dioxide, and phermones

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4
Q

how do ticks and mites differ?

A

tick - macroscopic, mostly off host
mite - microscopic, mostly on host

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5
Q

what are the 2 main families of the ticks?

A

Aragasidae (soft)
Ixodidae (hard)

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6
Q

which soft tick has one host?

A

Otobius megini (Spinose ear tick)

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7
Q

Which tick type (hard vs soft, and genera) can transmit Cattle fever aka Babesiosis?

A

Hard tick
Rhypicephalus

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8
Q

What was the first described tick borne disease?

A

Babseiosis

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9
Q

Rhipicephalus microplus tick causes ___ brain in cattle with Babesiosis. how?

A

PINK brain
discolored due to distended blood vessels

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10
Q

ID this winter tick

A

Dermacentor albipictus

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11
Q

list the important Argasidae Genera

A

Argas
Ornithodoros
Otobius

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12
Q

list the important Ixodidae Genera

A

Ixodes
Amblyomma
Dermacentor
Rhipicephalus

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13
Q

What’s the main vector of Ornithodoros spp

A

Epizootic bovine abortion aka Foothill abortion

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14
Q

ID. Is it hard or soft?

A

Ornithodoros spp
Soft

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15
Q

Where is Epizootic bovine abortion aka Foothill abortion common?

A

coastal, central CA, Nevada, OR

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16
Q

list examples of direct tick borne disease

A

irritation-tick worry
anemia
secondary infection
TOXICOSIS aka tick paralysis

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17
Q

list example of indirect diseases

A

pathogen transmission
- bacteria, protozoa, viruses

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18
Q

What are the two types of transmission of indirect disease?

A

transstadial (>1 host)
transovarian (1 host)

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19
Q

What was this dog ill with?

A

Rocky Mountain Spotted Fever (RMSF) aka Rickettsia rickettsii

20
Q

Which tick types can cause RMSF?

A

Dermacentor
Rhipicephalus (IN AZ)

21
Q

What’s the significance of Rhipicephalus sanguineus in AZ?

A

most common tick in AZ
MAJOR RMSF vector in AZ

22
Q

What’s a vector for Bovine Anaplasmosis?

A

Dermacentor andersoni

23
Q

where is Dermacentor andersoni found?

A

western US

24
Q

Clinical signs of bovine anaplasmosis?

A

hemolytic anemia, fever, depression, anorexia

25
Q

What’s the vector for American Canine Hepatozoonosis (Hepatozoon americanum)?

A

Amblyomma maculatum (gulf coast tick)

26
Q

where is Hepatozoon americanum mainly occurring?

A

south and central america and southeast US

27
Q

How is Hepatozoon americanum transmitted?

A

ingestion of infected tick or paratenic host ingests tick

28
Q

what are the two vectors of Cytauxzoonosis (Cytauxzoon felis)?

A

Amblyomma americanum and Dermacentor variabilis

29
Q

where does Cytauxzoonosis (Cytauxzoon felis) mainly occur?

A

SE, S-central, and mid-atlantic states

30
Q

what is tick paralysis? what’s it caused by?

A

neurologic syndrome
acute ataxia progression to ascending paralysis
caused by salivary neurotoxin

31
Q

What 4 ticks cause tick paralysis in North America?$

A
32
Q

What flies are within the Nematocera category?

A

mosquito
midges
blackflies
sandflies

33
Q

what flies are within Brachycera group?

A

myiasis causing (bot, blow, flesh)
stable flies
hornflies
keds
horse and deer flies

34
Q

List the main Genera of botflies

A

Oestrus
Hypoderma
Cuterebra
Gasterophilus

35
Q

how can you differentiate between botflies?

A

observing the shape of the bot spiracles

36
Q

ID these two botflies by their spiracle shape

A
37
Q

ID these two botflies by their spiracle shape

A
38
Q

Oestrus ovis affects what part of the sheep body?

A

face, causes neurologic signs

39
Q

Deceased cat presents with asymmetry of the brain, after presenting a few months ago with a suspected globe rupture. What’s the likely cause and condition?

A

Cuterebra larval migration
Condition - feline ischemic encephalopathy

40
Q

what are the 3 main vectors of heartworm?

A

Anapheles spp
Aedes spp
Culex spp

41
Q

List the following facts regarding canine heartworm…
Susceptibility
Adult worm lifespan
Single sex infections (yes/no)
Microfilaremia (yes/no, lifespan)
Primary organ

A

Susceptibility - HIGH
Adult worm lifespan - 5-7 years
Single sex infections - NO
Microfilaremia - Common, lives 1-2 years
Primary organ - Heart

42
Q

List the following facts regarding feline heartworm…
Susceptibility
Adult worm lifespan
Single sex infections (yes/no)
Microfilaremia (yes/no, lifespan)
Primary organ

A

Susceptibility - LOW
Adult worm lifespan - 2-4 years
Single sex infections - YES
Microfilaremia - Not Common, live 1 month
Primary organ - Lungs

43
Q

Which flea species is most common with a wide host range?

A

Ctenocephalides felis

44
Q

6mo pug presents with alopecia, erythema, erosion, ulcers, and crusts.
What is the likely cause?

A

Demodex canis
DDX - allergic dermatitis

45
Q

Red fox has strong immediate hypersensitivity, severe pruritis developed. What’s likely cause?

A

Sarcoptes scabiei

Parasitology (17 decks)

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