Canine/Feline- Insects: Cuterebra spp. and lice

Question 1

Examples of Insects

Answer 1

Cuterebra spp.
Culicidae
Lice
Fleas
Reduviidae and Cimicidae

Question 2

Insect characteristics

Answer 2

3 pairs of legs
A head
Distinct thorax and abdomen
Pair of antennae

Question 3

What is the Importance of flies in veterinary

parasitology?

Answer 3

Biological transmission of organisms (eg intermediate hosts of nematodes, protozoa, etc)
Mechanical transmission of organisms
Fly strike
Important to veterinary medicine

Question 4

Family Oestridae Larvae characteristics

Answer 4

obligatory parasites
host specific
(Cuterebra, Hypoderma and Oestrus)

Question 5

Family Oestridae Adults characteristics

Answer 5

large hairy flies
nonfunctional mouthparts
short-lived

Question 6

What are Cuterebra spp.Common name?

Answer 6

Rodent or rabbit bot fly, New World skin bot flies.

Question 7

What are Cuterebra spp.hosts?

Answer 7

Rodents, rabbits, squirrels, chipmunks, mice,
dogs, cats.
Zoonosis

Question 8

What is Cuterebra spp. Identification?

Answer 8

Third stage larva and season

3rd stage larva is dark brown and covered with black spines

Question 9

What is Cuterebra spp.Site(s) of infection

Answer 9

Subcutaneous connective tissue, can locate in

nasal and oral regions and migrate to brain

Question 10

What is Cuterebra spp. Pathogenesis and lesions?

Answer 10

Fibrotic cyst forms from larva in subcutaneous tissue. Larva in brain of cat can lead to
infarction

Question 11

What is Cuterebra spp. Clinical signs?

Answer 11

Lump in neck, fur constantly wet, hole drips fluid

Question 12

What is Cuterebra spp. Diagnosis?

Answer 12

Larva can be removed whole from breathing hole
Type 1 hypersensitivity type reaction
Wound heals slowly

Question 13

What is Cuterebra spp. Treatment and prevention?

Answer 13

Several remedies may protect, but are not approved.

Question 14

What is Culicidae.Common name?

Answer 14

Mosquitoes

Question 15

What is Culicidae Identification?

Answer 15

Pair of wings
long thin legs
long proboscis
long antennae

Question 16

What is Culicidae Pathogenesis and lesions

Answer 16

Transmit many diseases and pathogens

Question 17

What is Suborder Ischnocera (Mallophaga) characteristics?

Answer 17

Biting, chewing lice
Wide mandible mouthparts
Feed on skin, hair, feathers, other organic material
3 mm, yellow
Rapid movement to move over skin and covering
Often bird lice

Question 18

What is Trichodectes canis common name?

Answer 18

Dog biting louse or canine chewing louse

Question 19

What is Trichodectes canis hosts?

Answer 19

Dogs

Question 20

What is Trichodectes canis Identification?

Answer 20

Yellowish color,
biting/chewing mouthparts,
active louse,
adults 2 mm

Question 21

What is Trichodectes canis life cycle?

Answer 21

Female lays eggs, develop to nymphs and adults.

Require host to complete life cycle

Question 22

What is Trichodectes canis site(s) of infection?

Answer 22

Hair, Skin

Question 23

What is Trichodectes canis Pathogenesis and lesions?

Answer 23

Vector of D. caninum.
Heavy infestations in neglected and underfed animals.
Affects young

Question 24

What is Trichodectes canis susceptible breed?

Answer 24

spaniels

Question 25

What is Trichodectes canis Clinical signs?

Answer 25

Pruritus. Dogs scratch, cause loss of hair. Restless and scratch continuously. Anemia can occur

Question 26

What is Trichodectes canis Diagnosis?

Answer 26

Identification of louse

Question 27

What is Trichodectes canis Treatment and prevention

Answer 27

Avoid direct contact with brushes, combs and blankets | Recent products include MCL

Question 28

What is Suborder Anoplura characteristics?

Answer 28

``` Bloodsucking lice more pathogenic Pointed “noses” Large, 3-5 mm Dark blue, depending on amount blood ingested Slow moving Clasping hair shaft Lice of mammals ```

Question 29

What is Linognathus setosus Host?

Answer 29

Dogs

Question 30

What is Linognathus setosus Identification?

Answer 30

3-5 mm, head narrower than thorax, sucking mouthparts

Question 31

What is Linognathus setosus Life Cycle?

Answer 31

Similar to Trichodectes canis Female lays eggs, develop to nymphs and adults. Require host to complete life cycle

Question 32

What is Linognathus setosus Site(s) of infection

Answer 32

Skin

Question 33

What is Linognathus setosus Pathogenesis and lesions?

Answer 33

Heavy infestation can cause severe anemia

Question 34

What is Linognathus setosus Clinical signs?

Answer 34

Loss of body | condition and damage to skin

Question 35

What is Linognathus setosus Diagnosis?

Answer 35

Louse identification

Question 36

What is Linognathus setosus Treatment and prevention?

Answer 36

Avoid direct contact with brushes, combs and blankets | Recent products include MCL

Question 37

What is Linognathus setosus Common Name?

Answer 37

Dog sucking louse