Exam II - Linognathus setosus

Question 1

What is the common name for Linognathus setosus?

Answer 1

dog sucking louse

Question 2

What is/are the host(s) for Linognathus setosus?

Answer 2

Dogs.

Question 3

Linognathus setosus belong to which suborder?

Answer 3

Anoplura (bloodsucking lice)

Question 4

Describe the appearance of the Linognathus setosus adult

Answer 4

Adult is wingless, 3-5 mm long, flattened dorsoventrally, head is narrower than thorax, sucking mouthparts

Question 5

Describe the life cycle of Linognathus setosus

Answer 5

Egg -> Nymph -> Nymph -> Nymph -> Adult

Female attach eggs to hair, which develop to adults in a month. Egg hatches to nymphs, and after 3 molts fully grown adults are present. Requires host to complete life cycle.

Nymphs and adults can live off their hosts for only a few hours.

Whole life cycle is 2-4 weeks

Question 6

How long does the Linognathus setosus life cycle take?

Answer 6

~2-4 weeks

Question 7

What is/are the site(s) of infection for Linognathus setosus?

Answer 7

Skin.

Question 8

Describe the pathogenesis associated with heavy infestations of Linognathus setosus

Answer 8

severe anemia

Question 9

Describe some clinical signs associated with Linognathus setosus

Answer 9

loss of body condition & damage to skin

Question 10

How would you diagnose Linognathus setosus?

Answer 10

Louse identification

Question 11

How is Linognathus setosus transmitted?

Answer 11

direct contact with brushes, combs, and blankets