What Is Your Diagnosis?

Background Information

Age: 1 year old
Sex: Female spayed
Species: Canine
Breed: Large breed dog
History and lesion description: Skin lesions (see below)

Clinical signs

This dog was presented with multiple areas of pruritus, erythema, macules, papules and pustules.

The above image is from a skin scraping of one of these areas (20x objective).

What is your diagnosis?

To view the answer, select one of the proposed diagnostic test(s) below and click on ‘Show me the answer’.

A) Sarcoptes scabiei mite
B) Linognathus setosus louse
C) Demodex spp. mite
D) Keratinized material

“What is your diagnosis?” is a series of case studies prompted by real submissions to IDEXX Canada pathologists at their local IDEXX Reference Laboratory.

To protect the confidentiality of our customers and their clients, the background information in each case has been slightly modified.

View other case studies

Brittney Fierro, DVM, DACVP

Dr. Fierro received her DVM from Colorado State University in 2008. She then completed a clinical pathology residency at Michigan State University and became board-certified in clinical pathology by the American College of Veterinary Pathologists. Dr. Fierro joined IDEXX at the Johannesburg, South Africa laboratory. In 2014, she transferred to IDEXX Canada's laboratory in Delta, British Columbia. Dr. Fierro lives with her husband and two cats, who are now veteran world travelers.