Dermatology Review

Question 1

The topically applied parasiticide that is absorbed and then secreted through sebaceous secretions and that is labeled for a variety of ectoparasites, including sarcoptic mange, is:

a. Revolution (selamectin)
b. Frontline (fipronil)
c. Frontline Plus (fipronil plus methoprene)
d. Advantage (imidocloprid)
e. Advantix (imidocloprid, pyriproxifen, permethrin)

Answer 1

A

• ALSO: Advantage Multi

Question 2

The best antibiotic listed below for use as a systemic (oral) medication for a patient seen for the first time with superficial pyoderma where you find cocci on cytology, would be:

a. Chloramphenicol
b. Gentamicin
c. Cephalexin
d. Enrofloxacin
e. Marbofloxacin

Answer 2

C

• no fluoroquinolones for first time cases
• chloramphenicol is not bactericidal
• gentamicin is not available as an oral medication

Question 3

A six-month-old cockapoo is presented for face rubbing and foot licking. The owner has had the dog since it was 6 weeks old and it only recently (a few weeks) has been exhibiting this behavior. Your database tests are normal (skin scrapings, trichogram, and cytology for yeast). The dog certainly seems to be allergic to you, based on the excellent training you received in dermatology. What would be the next appropriate diagnostic test or procedure.

a. Give the dog Depo Medrol
b. Intradermal allergy test
c. Serologic allergy test
d. Begin a hypoallergenic diet trial
e. Skin biopsy

Answer 3

D

• atopy most common at 1-3 y/o
• serologic testing and intradermal allergy testing for foods are not reliable

Question 4

Which of the following mites would be considered contagious?

a. Demodex canis
b. Demodex injai
c. Demodex cati
d. Demodex gatoi
e. None of the above are contagious

Answer 4

D

• multiple pets in a household will be infected

Question 5

A four-year-old cat presents to your clinic with pruritus (moderate according to the owner, who admits that he doesn’t really know how itchy the cat is). The cat has a large flat, elevated lesion over the back. It is a reddish‐orange color and the cat licks and bites at the area. An impression smear of the lesion shows low numbers of neutrophils, a few cocci, and large numbers of eosinophils. No parasites are seen and no other lesions are present. What is the most likely cause of this
lesion?

a. Bacterial infection
b. Psychogenic causes
c. Traumatic
d. Dermatophytosis
e. Atopic dermatitis

Answer 5

E

• classical description of an eosinophilic plaque, most commonly seen with atopic dermatitis and food allergies