Lice

Question 1

What are the 4 chewing louse of veterinary importance?

Answer 1

Bovicola ovis, bovis, equi
Felicola subrostratus
Trichodectes canis
Menacanthus stramineus

Question 2

What are the 2 sucking louse of veterinary importance?

Answer 2

Haematopinus suis, asini

Linognathus ovillus, pedalis, setosus, vituli

Question 3

What is the site of infestation of bovicola ovis?

Answer 3

Can spread over the whole body

Question 4

What are the clinical signs of an infestation of bovicola ovis?

Answer 4

irritation
Restlessness
Exuded material causes mattes in the wool
Rubbing also causes a loss of wool

Question 5

What is the site of infestation of bovicola bovis?

Answer 5

Top of head
Neck
Rump
Shoulders 
Back
Lice aggregate in patches at these sites.

Question 6

What is the site of infestation of bovicola equi?

Answer 6

Shoulder
Base of tail
Head
Mane

Question 7

What temperature do lice prefer to live in?

Answer 7

37

Question 8

What humidity to lice prefer to live in?

Answer 8

70-90%

Question 9

What is the most common louse of cats?

Answer 9

Felicola subrostratus.

Little pathogenicity unless the cat is elderly or chronically ill.

Question 10

What is the site of infestation of trichodectes canis?

Answer 10

Head
Neck
Tail
Highly active species so intense irritation around predilection sites

Question 11

What are the clinical signs of a trichodectes canis infestation?

Answer 11

Inflammation
Excoriation
Alopecia
Secondary bacterial involvement

Question 12

What is the host of menacanthus stramineus?

Answer 12

Poultry

Question 13

What are the clinical signs of a menacanthus stramineus infestation?

Answer 13

Severe irritation
Inflamed skin
Scab covered skin

Decreased weight
Decreased clutch size
Death in young
Anaemia due to puncture of the feather quills

Question 14

What are the sites of menacanthus stramineus infestation?

Answer 14

Breast
Thighs
Around the vent

Question 15

What is the host of haematopinus suis?

Answer 15

Pigs

Question 16

What are the signs of infestation and location of haematopinus suis?

Answer 16

Scratching and skin
Damage from pediculosis
In the folds of the neck, jowl and ears

Question 17

What is the off-host survival of haematopinus suis?

Answer 17

3 days

Question 18

What is the host of haematopinus asini?

Answer 18

Horse

Question 19

What are the locations of haematopinus asini lice?

Answer 19

Head
Neck
Back
Inner surface of upper legs

Question 20

What are the clinical signs of infestation by haematopinus asini lice?

Answer 20

Restless
Loss of condition
Anaemia

Light infestation can remain asymptomatic

Question 21

What is the host of haematopinus eurysternus?

Answer 21

Cattle. Mature animals over the winter.

Question 22

What are the clinical signs of haematopinus eurysternus?

Answer 22

Anaemia.

Loss of body condition

Question 23

What is the host and location of linognathus ovillus lice?

Answer 23

Sheep face louse - face and ears.

Question 24

What is the host and location of linognathus pedalis lice?

Answer 24

Sheep

Feet, leg, scrotum

Question 25

What is the host and pathogenicity of linognathus setosus lice?

Answer 25

Dog
May cause anaemia.
Greater pathogenicity in younger animals.

Question 26

What is the host and location of linognathus vituli?

Answer 26

Cattle. Particularly dairy cattle.

Rump, shoulder, neck.

Question 27

What is pediculosis?

Answer 27

Pruritis
Alopecia
Excoriation - urge to pick at own skin
Self-wounding
Anaemia