Dermatology Flashcards
Horse with alopecia up to hocks
Mange, chorioptes?
Chorioptes mange sheep
Lower limbs and scrotum
Reportable
No zoonotic
Filly with skin lesions
Herditary equine regional dermal asthenia?
Easily torn skin, seroms/hematomas, scars, joint laxity
QH, paint, appaloosa
Horse with skin lesions in head, limbs and ventrum. Also acantholysis
Penfigus foliaceus
Cow with lesions in the skin
cutaneous lymphosarcoma?
Calf with mases in head
papilloma virus
Herd problem with lesions, vesicles, erosions skin udder
BHV-2
Expression BPV in sarcoids
Type of sarcoids
Yearling bull with proliferative lesions in facet of penis
BPV
Cows with ulcerative teats
Bovine herpes mamilitis?
Skin disease not causing vasculitis
Erytheme multiforme
Horse with ulcerative skin, vesicles and ulcers in mucous membranes. Tested negative for vesicular stomatitis
Bullous pemphigoid
Name the disease and the organism observed in the image
Dermatophilosis: Dermatophilus congolensis
“rain rot”
Vector of aural plaques?
Culicoides
BHV-2
Bovine herpes mammilitis
Heifer with circular alopecia around the eye. Handlers have been advised about wearing gloves!
“Ringworm” Dermatophytosis
Tricophytum verrucosum
Agent of equine epizootic lymphangitis
Histoplasma capsulatum
Horse biting louse
Damalinia
Horse sucking louse
Haematopinnus asini
Lesions of Chorioptic mange
Lower limbs and scrotum
Shire mare with loss of hair in legs and constant pruritus. Cause and how to treat
Mange, chorioptes
Treat with lyme sulfur
Sheep with pruritus, pustules, crusts and matted wool. Based on the diagnosis it has to be reported to the state veterinarian
Psoroptic mange
Ear mite in horses and goats
Psoroptes cuniculi
Treat with ivermectin
First areas affected by sarcoptic mange
Non-wool areas first, ears
Pig with alopecia, abscess in face, pruritus, weight loss, hyperkeratosis, comedones. The nutrition in the pig has been deficient
Demodex phylloides
Treat with lyme sulfur, doramectin
Drug used for cutaneous lymphoma
Progesterone
Types of melanomas
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
Which is thought to be the cause of equine sarcoids?
Bovine papillomavirus (BPV) types 1 and 2
Types of sarcoids
- Predom epidermal component/ indolent
- Verroucous: sessile (flat variety) or pedunculated (warty variety)
- Ocult: almost-circular alopecia with gray, scaly surface
- Predom dermal component/ invasive
* Nodular/fibroblastic: dermal or subcut mass that can ulcerate –> locally invasive –> can form regional metastasis - Mixed: transition
Only chemotherapeutic that has shown efficacy for equine sarcoid
Cisplatin
Piglet with greasy exudate around eyes, eruption nose, tongue, lips coronets. No fever
Staphylococcus hycus “Greasy pig”
Zinc deficiency in cattle
Hyperkeratosis
The llama in the picture has a diet deficient in minerals, what is the cause of the alopecia?
Zinc deficiency, cause hyperkeratosis
- Not a true zinc deficiency but is idiopathic hyperkeratosis responsive to zinc supplementation
