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Clinical Lab Procedures > External Parasites > Flashcards

External Parasites Flashcards

1
Q

What external parasite is this?

  1. Blood sucking
  2. Vectors
    - Bubonic plague
    - Intermediate host to Dipylidium caninum
A

fleas

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2
Q

What does a hypersensitivity to flea saliva cause?

A

flea-allergy dermatitis

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3
Q

What external parasite is this?

Ctenocephalides felis

A

fleas

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4
Q

What external parasite is this?

  1. Blood sucking
  2. Vectors
    - Bacterial, viral, rickettsial, protozoal diseases
    - Lyme’s Disease
A

ticks

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5
Q

What causes tick paralysis?

A

neurotoxin in saliva

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6
Q

What does the tick Dermacentor andersoni cause?

A

Rocky Mountain Spotted Fever

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7
Q

What external parasite has this lifecycle?

Egg –> 6-legged nymph –> 8-legged adult

A

ticks

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8
Q

What family are these external parasites in?

  1. hard ticks
  2. Rhipicephalus sanguines
  3. Dermacentor variabilis
A

Family Ixodidae

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9
Q

What tick is this?

Rhipicephalus sanguines

A

Brown Dog Tick

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10
Q

What tick is this?

  1. Dermacentor variabilis
  2. also causes tick paralysis
A

American Dog Tick

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11
Q

What family are these external parasites in?

  1. soft ticks
  2. Otobius megnini
A

Family Argasidae

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12
Q

What tick is this?

Otobius megnini

A

spinous ear tick

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13
Q

What family are these external parasites in?

  1. sucking louse
  2. Linognathus setosus
  3. Hematospinus asini
  4. Pthirus pubis
A

Family Anoplura

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14
Q

What animal does the louse Linognathus setosus affect?

A

dogs

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15
Q

What animal does the louse Hematospinus asini affect?

A

horses

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16
Q

What animal does the louse Pthirus pubis affect? (3)

A
  1. humans
  2. dogs
  3. cats
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17
Q

What external parasite is this?

  1. Spend entire lifecycle on host
  2. Spread by direct contact
  3. Eggs (nits)
    - Attach to hair shaft
A

lice

18
Q

What family are these external parasites in?

  1. biting louse
  2. Trichodectes canis
  3. Felicola subrostrata
  4. Daemilinea caprae
A

Family Mallophaga

19
Q

What animal does the louse Trichodectes canis affect?

A

dogs

20
Q

What animal does the louse Felicola subrostrata affect?

A

cat

21
Q

What animal does louse

Daemilinea caprae affect?

A

goat

22
Q

What external parasite in non-pathogenic in small numbers?

A

demodex

23
Q

What external parasite is host specific and can’t be transmissible?

A

demodex

24
Q

What external parasite has this life cycle?

6-legged larva –> 8-legged nymph –> adult

A

demodex

25
Q

What external parasite lives in hair follicles and sebaceous glands?

A

demodex

26
Q

What type of demodicosis causes patchy alopecia? (demodex)

A

localized demodicosis

27
Q

What type of demodicosis causes diffuse alopecia and secondary bacteria infections? (demodex)

A

generalized demodicosis

28
Q

What family are these parasites in?

  1. Sarcopes spp.
  2. Notodres spp.
A

Family Sarcoptidae

29
Q

What external parasites (2) burrow within the epidermis and are extremely pruritic?

A
  1. Sarcopes spp.

2. Notodres spp.

30
Q

What external parasite causes Canine “scabiei” or sarcoptic mange?

A

Sarcopes scabiei (canis)

31
Q

What parasitic disease cases these symptoms?

  1. Scaling, crusting, self-trauma
  2. Ears, lateral elbows, ventral abdomen harbor mites
  3. May be transmitted to humans, but considered to be self-limiting
  4. Highly contagious to other dogs
A

Sarcoptic mange

Sarcopes scabiei (canis)

32
Q

What parasite causes mange in cats?

A

Notoedres cati

Notoendric Mange

33
Q

What parasitic disease causes these symptoms?

  1. Raised rash, crustiness
  2. Irritation, scratching
  3. Can burrow faster than we can scrape them off
A

Notoendric Mange

34
Q

What family are these parasites in?

  1. Psoroptes sp.
  2. Chorioptes sp.
  3. Otodectes sp.
A

Family Psoroptidae

35
Q

What external parasites mostly effect cattle and sheep? (2)

A

Psoroptes sp.

Chorioptes sp.

36
Q

What external parasite mostly effects cattle but not sheep?

A

Otodectes sp.

37
Q

What external parasite is this?

  1. Ear mite
  2. Causes otitis externa in dogs and cats
  3. Not host specific
  4. Causes irritation, dark, dry crust in the ear canals
A

Otodectes cynotis

38
Q

What external parasite is this?

  1. Walking Dandruff Mite
  2. Skin surface
  3. Relatively host specific
  4. Causes scaling and crusting
A

Cheyletiella spp.

39
Q

What external parasite is this?

  1. Chiggers
  2. Humans can be affected
  3. Only larva are parasitic, nymphs and adults are free living (not host specific)
  4. Larva only attaches for several hours
  5. Causes a red rash
A

Trombicula Mites

40
Q

What external parasite is this?

  1. Eggs laid in soil of rodent burrows
  2. Infest rabbits, cats, occasionally dogs
  3. Larva penetrates host’s skin and live SQ with a fistula to outside
  4. Surgically removed
A

Cuterebra Fly

Clinical Lab Procedures (42 decks)

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