Exam II - Trichodectes canis

Question 1

What is the common name for Trichodectes canis?

Answer 1

Dog biting louse

or

canine chewing louse

Question 2

What is the final host for Trichodectes canis?

Answer 2

dogs

Question 3

Describe the size of the head compared to the thorax for Trichodectes canis

Answer 3

The head is as broad as or broader than thorax

Question 4

How long does it take for *Trichodectes canis *eggs to develop to adults?

Answer 4

~a month

Question 5

Describe the life cycle of Trichodectes canis

Answer 5

Female lays whitish eggs (“nits”), which develop to adults in a month. Eggs hatch to nymphs, and after 3 molts fully grown adults are present

Requires the host to complete life cycle. Lice are active on host.

Question 6

What is/are the site(s) of infection for Trichodectes canis?

Answer 6

Hair, skin, edge of ears

Question 7

Descibe some clinical signs for Trichodectes canis.

Answer 7

Pruritis.

Dog scratches can cause self inflicted injury, loss of hair.

In a mixed infestation with a sucking louse, we might see anemia.

Dogs are usually restless and scratch continuously.

Question 8

How is *Trichodectes canis *transmitted to a dog?

Answer 8

Direct dog to dog transmission & direct transfer of nymph & adult stages with brushes, combs, & blankets