Ectoparasites

Question 1

What is the single species of chewing lice in cattle called?

Answer 1

Damalina bovis

Question 2

What are the 3 biting lice of cattle called?

Answer 2

Haematopinus eurysternus
Linognathus vituli
Solenoptes capillatus

Question 3

What treatment should you give for both biting and chewing lice?

Answer 3

Permethrin

Improve management

Question 4

What disease are spread by flies?

Answer 4

Summer mastitis
Bovine keratoconjunctivitis
Warble fly

Question 5

How can you control flies on cattle kept indoors?

Answer 5

Maintain good hygiene

Use insecticide sprays / tape strips

Question 6

How can you control flies in cattle kept outdoors?

Answer 6

Keep away from trees
Permethrins
Synthetic pyrethroid impregnated ear tag
Pour on synthetic pyrethroids

Question 7

What parasites would you expect in cattle that have been housed over the winter and are presenting with crusty, pruritic tail head lesions?

Answer 7

Chorioptes bovis - less pruritic

Psoroptes - intensely pruritic and spreads to the shoulders, mortality

Question 8

How should you treat chorioptes bovis?

Answer 8

Dairy cattle - eprinermectin

Beef cattle - any ivermectin

Question 9

How should you treat psoroptic mange in cattle?

Answer 9

DON’T USE IVERMECTIN
Wash cows to remove faeces - pruritus flare
4% permethrin pour on = 1st choice
Amitraz

Question 10

How does Sarcoptic mange present in cattle?

Answer 10

Intense pruritus

Over the head, neck and shoulder