Equine Dermatology Flashcards
(91 cards)
1
Q
Categories
A
- 1). Scaling + crusting - most common
- 2). Lumps + bumps: papules, nodules, mass
- 3). Pruritus/pain: skin trauma, rubbing, 2y hair loss from trauma
- 4). Hair loss/changes in hair quality: 1y hair loss, skin fine
- 5). Moist + exudative: uncommon
- 6). Pigmentary changes: depigmentation most common
- 7). Skin disease as part of a wider systemic disorder
2
Q
A
Insect bite hypersensitivity = Sweet itch, from Culicoides midge
3
Q
When are allergies seen?
A
- Not in foals
- > 5/6 y/o
- Sweet itch = > 2 y/o
4
Q
A
Papilloma - seen in young foals and yearlings due to limited immune response
5
Q
Where are sarcoids common
A
- Older horses
6
Q
A
Dermatophytosis
7
Q
A
- Pastern dermatitis (mud fever) - triggered by persistent wetting of lower limbs
- Skin irritation -> 2y infection
- May be seen in other horses
8
Q
A
Insect bite hypersensitivity
9
Q
A
- HERDA = genetic disease in quarter horses and appaloosas, especially cutting horses
- Stretchy skin, severe skin wounds and scarring along the back and withers
- Not that important
10
Q
A
Flat sarcoid
11
Q
A
Previous Tx making skin lesion worse
12
Q
Macule/patch
A
- Flat lesion = change in pigmentation, depigmentation usually
- E.g. Vitiligo, post-inflammatory leucoderma, erythema multiforme
13
Q
A
Vitiligo
14
Q
A
Post-inflam leucoderma
15
Q
A
Erythema multiforme
16
Q
Papule
A
- Small raised lesion
- < 1 cm
- Usually infective - bacterial or fungal
- Can be allergic but would present as larger wheals
- E.g. Dermatophytosis
- Staphyloccocal folliculitis or both
17
Q
A
Dermatophytosis
18
Q
A
Staphylococcal folliculitis
19
Q
A
Dermatophytosis + staphyloccocal folliculitis
20
Q
Nodule/mass
A
21
Q
A
Eosinophilic granulomas
22
Q
A
Sarcoid
23
Q
A
Melanoma
24
Q
A
Botriomycosis - draught breeds prone to chronic progressive lymphoedema -> fill w/ fluid -> irritation from feather lice scratch
25
Plaque/wheal
26
Urticaria
27
Lymphoma
28
Urticaria - hives allergic skin reaction
29
Vesicle/bulla/pustule
30
Pemphigus foliaceus = autoimmune pustules/crusts
31
Alopecia/hypotrichosis
32
Telogen defluxion - excessive hair shedding, been sick recently
33
Lice
34
Pemphigus foliaceus
35
Alopecia areta - immune attack on hair follicles
36
Sarcoid
37
Dermatophytosis
38
Hyperkeratosis/lichenification
39
Linear keratosis
40
Aural plaque (papilloma)
41
Insect bite hypersensitivity
42
Scale
43
Seborrhoea
44
Pemphigus foliaceus
45
Chorioptes
46
Sarcoidosis -> granulomatous chronic skin disease
47
Crust
48
Pastern dermatitis
49
Dermatophytosis
50
Cutaneous lupus
51
Pemphigus foliaceus
52
Ulcer/erosion
53
Staphylococcal dermatitis
54
Candidiasis
55
Chemical burn
56
Abrasion
57
Photoaggravated vasculitis
58
Intertrigo
59
Mixed lesion
60
Mucocutaneous
61
EHV-3
62
Rhinosporidium - fungal
63
Abrasive diet
64
Contact irritant
65
Abrasive diet
66
Cutaneous lupus
67
Limb distribution
68
Chorioptic mange
69
Cannon keratosis
70
Lymphoedema
71
Photoaggravated vasculitis
72
- "Mallenders amd Sallenders"
- Common in cobs + draught breeds
- Back of carpi, front of tarsi
73
Dorsal distribution
74
Herda
75
Dermatophytosis
76
Dermoid cysts = directly in midline
77
Eosinophilic granuloma = off to side of midline (DDx = dermoid cysts)
78
Facial distribution
79
Papilloma
80
Sarcoid
81
Dermatophyte
82
Papilloma
83
Pemphigus foliaceus
84
Depigmentation
85
Tack sites distribution
86
Eosinophilic granulomas
87
Staphylococcal foliculitis
88
Staphylococcal folliculitis
89
Mechanical abrasion
90
Dermatophyte
91
What must be included on PPEs?
- Examine, describe + record
- Categorise + form list of DDx e.g. “1 cm diameter area of alopecia and scaling skin on right side of face. Probable ringworm but other causes such as fly-bite, bacterial dermatitis or flat sarcoid cannot be discounted"
