Lice Flashcards
What are the 4 chewing louse of veterinary importance?
Bovicola ovis, bovis, equi
Felicola subrostratus
Trichodectes canis
Menacanthus stramineus
What are the 2 sucking louse of veterinary importance?
Haematopinus suis, asini
Linognathus ovillus, pedalis, setosus, vituli
What is the site of infestation of bovicola ovis?
Can spread over the whole body
What are the clinical signs of an infestation of bovicola ovis?
irritation
Restlessness
Exuded material causes mattes in the wool
Rubbing also causes a loss of wool
What is the site of infestation of bovicola bovis?
Top of head Neck Rump Shoulders Back Lice aggregate in patches at these sites.
What is the site of infestation of bovicola equi?
Shoulder
Base of tail
Head
Mane
What temperature do lice prefer to live in?
37
What humidity to lice prefer to live in?
70-90%
What is the most common louse of cats?
Felicola subrostratus.
Little pathogenicity unless the cat is elderly or chronically ill.
What is the site of infestation of trichodectes canis?
Head
Neck
Tail
Highly active species so intense irritation around predilection sites
What are the clinical signs of a trichodectes canis infestation?
Inflammation
Excoriation
Alopecia
Secondary bacterial involvement
What is the host of menacanthus stramineus?
Poultry
What are the clinical signs of a menacanthus stramineus infestation?
Severe irritation
Inflamed skin
Scab covered skin
Decreased weight
Decreased clutch size
Death in young
Anaemia due to puncture of the feather quills
What are the sites of menacanthus stramineus infestation?
Breast
Thighs
Around the vent
What is the host of haematopinus suis?
Pigs
What are the signs of infestation and location of haematopinus suis?
Scratching and skin
Damage from pediculosis
In the folds of the neck, jowl and ears
What is the off-host survival of haematopinus suis?
3 days
What is the host of haematopinus asini?
Horse
What are the locations of haematopinus asini lice?
Head
Neck
Back
Inner surface of upper legs
What are the clinical signs of infestation by haematopinus asini lice?
Restless
Loss of condition
Anaemia
Light infestation can remain asymptomatic
What is the host of haematopinus eurysternus?
Cattle. Mature animals over the winter.
What are the clinical signs of haematopinus eurysternus?
Anaemia.
Loss of body condition
What is the host and location of linognathus ovillus lice?
Sheep face louse - face and ears.
What is the host and location of linognathus pedalis lice?
Sheep
Feet, leg, scrotum
What is the host and pathogenicity of linognathus setosus lice?
Dog
May cause anaemia.
Greater pathogenicity in younger animals.
What is the host and location of linognathus vituli?
Cattle. Particularly dairy cattle.
Rump, shoulder, neck.
What is pediculosis?
Pruritis Alopecia Excoriation - urge to pick at own skin Self-wounding Anaemia
