Ectoparasites

Question 1

Where do ectoparasites live?

Answer 1

On or in the skin

Question 2

Define Infect

Answer 2

Internal

Question 3

Define Infest

Answer 3

External

Question 4

Define definitive host

Answer 4

harbors the adult parasite

Question 5

Define intermediate host

Answer 5

harbors the juvenile parasite

Question 6

What are the two main groups ectoparasites are divided into?

Answer 6

Acarina and Insecta

Question 7

Examples of Acarina

Answer 7

Ticks and mites

Question 8

Examples of Insecta

Answer 8

Lice, fleas, and grubs

Question 9

Defining features of Acarina

Answer 9

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

Question 10

Name the three times of mites

Answer 10

• Demodex canis
• Sarcoptes scabiei
• Otodectes cynotis

Question 11

Where do sarcoptes scabiei live?

Answer 11

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

Question 12

Where does demodex live?

Answer 12

In the hair follicles and skin glands

Question 13

What do mites normally eat?

Answer 13

Skin debris or some puncture and suck lymph fluid

Question 14

Defining features of insects

Answer 14

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

Question 15

How much time do insects spend on their host?

Answer 15

Very little time except lice

Question 16

Defining features of lice

Answer 16

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

Question 17

What are the two types of lice?

Answer 17

Sucking and biting louse

Question 18

Scientific name for the suckling lice

Answer 18

Anoplura

Question 19

Scientific name for the biting louse

Answer 19

Mallophaga

Question 20

What are grubs?

Answer 20

Maggot like larvae

Question 21

Defining features of fleas

Answer 21

• Flattened bodies
• Wingless
• Powerful legs for leaping

Question 22

Most common method for mite identification

Answer 22

skin scape

Question 23

What number blade is used for skin scrapes?

Answer 23

Number 10 blade

Question 24

What does the depth of the scrape depend on?

Answer 24

The location being taken from and the suspected mite

Question 25

When do you use the cellophane tape method?

Answer 25

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

Question 26

How do you identify the parasite?

Answer 26

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

Question 27

Defining features of the chewing lice

Answer 27

- Smaller than the sucking - Head is wider than the widest part of the thorax - large round head - yellow

Question 28

Defining features of the sucking lice

Answer 28

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

Question 29

Scientific name of Cat biting louse

Answer 29

Felicola subostratus

Question 30

Scientific name of the canine biting louse

Answer 30

Trichodectes canis

Question 31

Scientific name for the dog/cat sucking louse

Answer 31

Linognathus setosus

Question 32

Name for infestation of lice

Answer 32

Pediculosis

Question 33

Where is Cuterabra found in on animals?

Answer 33

In a swollen cyst like subcutaneous site with a fistula

Question 34

How do pets usually contract this grub?

Answer 34

While investigating or hunting rodent prey

Question 35

Where is Cuterebra usually seen on the animal?

Answer 35

Around the head or neck

Question 36

What is the most economically important insect to the veterinarian?

Answer 36

Flea

Question 37

Most common flea?

Answer 37

Ctenocephalides felis

Question 38

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

Answer 38

Echidnophaga gallinacea

Question 39

Distinct features of Sarcoptes scabiei

Answer 39

- Burrows and makes tunnels in skin - Causes a crusting scale and excoriation - Cause extreme itching

Question 40

Where is Sarcoptes scabiei mostly found?

Answer 40

Ears, lateral elbows, and ventral abdomen

Question 41

Scientific name for the Feline scabies mite?

Answer 41

Notoedres cati

Question 42

Where is notoedres cati mostly found on?

Answer 42

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

Question 43

Scientific name for the ear mite?

Answer 43

Otodectes cynotis

Question 44

What are the clinical signs for Otodectes cynotis?

Answer 44

Animal is shaking his head and scratching ears

Question 45

Scientific name for the Feline fur mite?

Answer 45

Lynxacarus radovskyi

Question 46

Where is Lyncacarus radovskyi generally found on body?

Answer 46

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

Question 47

Where does Demodex reside on animal?

Answer 47

Hair follicles and sebaceous glands

Question 48

What are the four stages of Demodex?

Answer 48

- Egg - Larva - Nymph - Adult

Question 49

What is given to treat Demodex?

Answer 49

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

Question 50

What are the two forms of Demodicosis?

Answer 50

Localized and generalized

Question 51

Scientific names for feline Demodex?

Answer 51

Demodex cati and Demodex gatori

Question 52

Scientific name for the Walking dandruff mite?

Answer 52

Cheyletiella species