Exam II - Sarcoptes scabiei

Question 1

What is the common name for Sarcoptes scabei?

Answer 1

itch mite, neck and tail mange

Question 2

What are the main differences between Sarcoptes on a dog and Sarcoptes on a cow?

Answer 2

Sarcoptes on a cow is reportable. Also, location is slightly different

Question 3

Describe the Sarcoptes scabei adult

Answer 3

Round, 500 um, legs short with anterior 2 pairs extending beyond the margin of the body.

Question 4

Describe the Sarcoptes scabei life cycle

Answer 4

E - L - N - A

PPP is 17-21 days.

Question 5

What is/are the site(s) of infection for Sarcoptes scabei?

Answer 5

Epidermal layers of skin.

Question 6

Describe pathogenesis & clinical signs for Sarcoptes scabei

Answer 6

• potentially the most severe cattle mange
• Mild infection –> scaly skin
• Severe infection –> thickened skin
• Downgrading of hides, drop in meat and milk production

Question 7

How do you diagnose Sarcoptes scabei?

Answer 7

skin scraping

Question 8

Treatment & prevention options for Sarcoptes scabei?

Answer 8

MCLs

eprinomectin approved for lactating dairy cattle

Sarcoptes scabei on cow must be reported to authorities