Dermatology

Question 1

Horse with alopecia up to hocks

Answer 1

Mange, chorioptes?

Question 2

Chorioptes mange sheep

Answer 2

Lower limbs and scrotum

Reportable

No zoonotic

Question 3

Filly with skin lesions

Answer 3

Herditary equine regional dermal asthenia?

Easily torn skin, seroms/hematomas, scars, joint laxity

QH, paint, appaloosa

Question 4

Horse with skin lesions in head, limbs and ventrum. Also acantholysis

Answer 4

Penfigus foliaceus

Question 5

Cow with lesions in the skin

Answer 5

cutaneous lymphosarcoma?

Question 6

Calf with mases in head

Answer 6

papilloma virus

Question 7

Herd problem with lesions, vesicles, erosions skin udder

Answer 7

BHV-2

Question 8

Expression BPV in sarcoids

Answer 8

Type of sarcoids

Question 9

Yearling bull with proliferative lesions in facet of penis

Answer 9

BPV

Question 10

Cows with ulcerative teats

Answer 10

Bovine herpes mamilitis?

Question 11

Skin disease not causing vasculitis

Answer 11

Erytheme multiforme

Question 12

Horse with ulcerative skin, vesicles and ulcers in mucous membranes. Tested negative for vesicular stomatitis

Answer 12

Bullous pemphigoid

Question 13

Name the disease and the organism observed in the image

Answer 13

Dermatophilosis: Dermatophilus congolensis

“rain rot”

Question 14

Vector of aural plaques?

Answer 14

Culicoides

Question 15

BHV-2

Answer 15

Bovine herpes mammilitis

Question 16

Heifer with circular alopecia around the eye. Handlers have been advised about wearing gloves!

Answer 16

“Ringworm” Dermatophytosis

Tricophytum verrucosum

Question 17

Agent of equine epizootic lymphangitis

Answer 17

Histoplasma capsulatum

Question 18

Horse biting louse

Answer 18

Damalinia

Question 19

Horse sucking louse

Answer 19

Haematopinnus asini

Question 20

Lesions of Chorioptic mange

Answer 20

Lower limbs and scrotum

Question 21

Shire mare with loss of hair in legs and constant pruritus. Cause and how to treat

Answer 21

Mange, chorioptes

Treat with lyme sulfur

Question 22

Sheep with pruritus, pustules, crusts and matted wool. Based on the diagnosis it has to be reported to the state veterinarian

Answer 22

Psoroptic mange

Question 23

Ear mite in horses and goats

Answer 23

Psoroptes cuniculi

Treat with ivermectin

Question 24

First areas affected by sarcoptic mange

Answer 24

Non-wool areas first, ears

Question 25

Pig with alopecia, abscess in face, pruritus, weight loss, hyperkeratosis, comedones. The nutrition in the pig has been deficient

Answer 25

Demodex phylloides Treat with lyme sulfur, doramectin

Question 26

Drug used for cutaneous lymphoma

Answer 26

Progesterone

Question 27

Types of melanomas

Answer 27

Dermal melanoma--\> deep dermis--\> gray horses \>6yo --\> typical locations (benign in gray/ more malignant in solid color) Melanocytic nevi (melanocytoma)--\> epidermal-dermal junction--\> any color \< 6yo --\> atypical locations (benign) Anaplastic malignant melanomas (poor pigment) --\> \>20yo any color --\> Metastasis lungs, spleen, liver

Question 28

Which is thought to be the cause of equine sarcoids?

Answer 28

Bovine papillomavirus (BPV) types 1 and 2

Question 29

Types of sarcoids

Answer 29

1. Predom epidermal component/ indolent * Verroucous: sessile (flat variety) or pedunculated (warty variety) * Ocult: almost-circular alopecia with gray, scaly surface 2. Predom dermal component/ invasive * Nodular/fibroblastic: dermal or subcut mass that can ulcerate --\> locally invasive --\> can form regional metastasis 3. Mixed: transition

Question 30

Only chemotherapeutic that has shown efficacy for equine sarcoid

Answer 30

Cisplatin

Question 31

Piglet with greasy exudate around eyes, eruption nose, tongue, lips coronets. No fever

Answer 31

Staphylococcus hycus "Greasy pig"

Question 32

Zinc deficiency in cattle

Answer 32

Hyperkeratosis

Question 33

The llama in the picture has a diet deficient in minerals, what is the cause of the alopecia?

Answer 33

Zinc deficiency, cause hyperkeratosis * Not a true zinc deficiency but is idiopathic hyperkeratosis responsive to zinc supplementation