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Lab procedures lecture > Ectoparasites > Flashcards

Ectoparasites Flashcards

1
Q

Where do ectoparasites live?

A

On or in the skin

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2
Q

Define Infect

A

Internal

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3
Q

Define Infest

A

External

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4
Q

Define definitive host

A

harbors the adult parasite

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5
Q

Define intermediate host

A

harbors the juvenile parasite

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6
Q

What are the two main groups ectoparasites are divided into?

A

Acarina and Insecta

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7
Q

Examples of Acarina

A

Ticks and mites

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8
Q

Examples of Insecta

A

Lice, fleas, and grubs

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9
Q

Defining features of Acarina

A
  • Has two body segments
  • Fused head and thorax
  • Four pairs of legs
  • No wings or antennae
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10
Q

Name the three times of mites

A
  • Demodex canis
  • Sarcoptes scabiei
  • Otodectes cynotis
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11
Q

Where do sarcoptes scabiei live?

A

They burrow tunnels in the skin which is where they live, feed, and deposit eggs

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12
Q

Where does demodex live?

A

In the hair follicles and skin glands

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13
Q

What do mites normally eat?

A

Skin debris or some puncture and suck lymph fluid

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14
Q

Defining features of insects

A
  • Have head, thorax and abdomen
  • May or may not have wings
  • One pair of antennae
  • Three pairs of legs on thorax
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15
Q

How much time do insects spend on their host?

A

Very little time except lice

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16
Q

Defining features of lice

A
  • Head with mouth parts and antennae
  • 3 pairs of legs and no wings
  • Abdomen
  • Legs adapted to cling on hair
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17
Q

What are the two types of lice?

A

Sucking and biting louse

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18
Q

Scientific name for the suckling lice

A

Anoplura

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19
Q

Scientific name for the biting louse

A

Mallophaga

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20
Q

What are grubs?

A

Maggot like larvae

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21
Q

Defining features of fleas

A
  • Flattened bodies
  • Wingless
  • Powerful legs for leaping
22
Q

Most common method for mite identification

A

skin scape

23
Q

What number blade is used for skin scrapes?

A

Number 10 blade

24
Q

What does the depth of the scrape depend on?

A

The location being taken from and the suspected mite

25
Q

When do you use the cellophane tape method?

A

For lice or mites that live on the surface of the skin

26
Q

How do you identify the parasite?

A

Collect the specimen in a sealed container with 10% formalin or ethyl alcohol

27
Q

Defining features of the chewing lice

A
  • Smaller than the sucking
  • Head is wider than the widest part of the thorax
  • large round head
  • yellow
28
Q

Defining features of the sucking lice

A
  • Larger than chewing lice
  • Red to gray depending on how much blood sucked
  • Head is narrower than widest part of the thorax
29
Q

Scientific name of Cat biting louse

A

Felicola subostratus

30
Q

Scientific name of the canine biting louse

A

Trichodectes canis

31
Q

Scientific name for the dog/cat sucking louse

A

Linognathus setosus

32
Q

Name for infestation of lice

A

Pediculosis

33
Q

Where is Cuterabra found in on animals?

A

In a swollen cyst like subcutaneous site with a fistula

34
Q

How do pets usually contract this grub?

A

While investigating or hunting rodent prey

35
Q

Where is Cuterebra usually seen on the animal?

A

Around the head or neck

36
Q

What is the most economically important insect to the veterinarian?

A

Flea

37
Q

Most common flea?

A

Ctenocephalides felis

38
Q

What is the flea that sticks to the ear of the host and known as the “stick-tight flea”?

A

Echidnophaga gallinacea

39
Q

Distinct features of Sarcoptes scabiei

A
  • Burrows and makes tunnels in skin
  • Causes a crusting scale and excoriation
  • Cause extreme itching
40
Q

Where is Sarcoptes scabiei mostly found?

A

Ears, lateral elbows, and ventral abdomen

41
Q

Scientific name for the Feline scabies mite?

A

Notoedres cati

42
Q

Where is notoedres cati mostly found on?

A

On the ears, back of neck, face, feet, and even over the entire body- causes crusty lesions

43
Q

Scientific name for the ear mite?

A

Otodectes cynotis

44
Q

What are the clinical signs for Otodectes cynotis?

A

Animal is shaking his head and scratching ears

45
Q

Scientific name for the Feline fur mite?

A

Lynxacarus radovskyi

46
Q

Where is Lyncacarus radovskyi generally found on body?

A

On the shafts of individual hairs on back, neck, thorax and hindlimbs

47
Q

Where does Demodex reside on animal?

A

Hair follicles and sebaceous glands

48
Q

What are the four stages of Demodex?

A
  • Egg
  • Larva
  • Nymph
  • Adult
49
Q

What is given to treat Demodex?

A

Amitraz, Benzoyl peroxide to do a follicular flushing, and Ivermectin

50
Q

What are the two forms of Demodicosis?

A

Localized and generalized

51
Q

Scientific names for feline Demodex?

A

Demodex cati and Demodex gatori

52
Q

Scientific name for the Walking dandruff mite?

A

Cheyletiella species

Lab procedures lecture (2 decks)

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