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AAA Y4 SEM2 > Equine Dermatology > Flashcards

Equine Dermatology Flashcards

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
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2
Q
A

Insect bite hypersensitivity = Sweet itch, from Culicoides midge

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3
Q

When are allergies seen?

A
  • Not in foals
  • > 5/6 y/o
  • Sweet itch = > 2 y/o
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4
Q
A

Papilloma - seen in young foals and yearlings due to limited immune response

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5
Q

Where are sarcoids common

A
  • Older horses
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6
Q
A

Dermatophytosis

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7
Q
A
  • Pastern dermatitis (mud fever) - triggered by persistent wetting of lower limbs
  • Skin irritation -> 2y infection
  • May be seen in other horses
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8
Q
A

Insect bite hypersensitivity

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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
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10
Q
A

Flat sarcoid

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11
Q
A

Previous Tx making skin lesion worse

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12
Q

Macule/patch

A
  • Flat lesion = change in pigmentation, depigmentation usually
  • E.g. Vitiligo, post-inflammatory leucoderma, erythema multiforme
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13
Q
A

Vitiligo

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14
Q
A

Post-inflam leucoderma

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15
Q
A

Erythema multiforme

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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
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17
Q
A

Dermatophytosis

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18
Q
A

Staphylococcal folliculitis

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19
Q
A

Dermatophytosis + staphyloccocal folliculitis

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20
Q

Nodule/mass

A
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21
Q
A

Eosinophilic granulomas

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22
Q
A

Sarcoid

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23
Q
A

Melanoma

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24
Q
A

Botriomycosis - draught breeds prone to chronic progressive lymphoedema -> fill w/ fluid -> irritation from feather lice scratch

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25
Q

Plaque/wheal

A
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26
Q
A

Urticaria

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27
Q
A

Lymphoma

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28
Q
A

Urticaria - hives allergic skin reaction

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29
Q

Vesicle/bulla/pustule

A
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30
Q
A

Pemphigus foliaceus = autoimmune pustules/crusts

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31
Q

Alopecia/hypotrichosis

A
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32
Q
A

Telogen defluxion - excessive hair shedding, been sick recently

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33
Q
A

Lice

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34
Q
A

Pemphigus foliaceus

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35
Q
A

Alopecia areta - immune attack on hair follicles

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36
Q
A

Sarcoid

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37
Q
A

Dermatophytosis

38
Q

Hyperkeratosis/lichenification

A
39
Q
A

Linear keratosis

40
Q
A

Aural plaque (papilloma)

41
Q
A

Insect bite hypersensitivity

42
Q

Scale

A
43
Q
A

Seborrhoea

44
Q
A

Pemphigus foliaceus

45
Q
A

Chorioptes

46
Q
A

Sarcoidosis -> granulomatous chronic skin disease

47
Q

Crust

A
48
Q
A

Pastern dermatitis

49
Q
A

Dermatophytosis

50
Q
A

Cutaneous lupus

51
Q
A

Pemphigus foliaceus

52
Q

Ulcer/erosion

A
53
Q
A

Staphylococcal dermatitis

54
Q
A

Candidiasis

55
Q
A

Chemical burn

56
Q
A

Abrasion

57
Q
A

Photoaggravated vasculitis

58
Q
A

Intertrigo

59
Q

Mixed lesion

A
60
Q

Mucocutaneous

A
61
Q
A

EHV-3

62
Q
A

Rhinosporidium - fungal

63
Q
A

Abrasive diet

64
Q
A

Contact irritant

65
Q
A

Abrasive diet

66
Q
A

Cutaneous lupus

67
Q

Limb distribution

A
68
Q
A

Chorioptic mange

69
Q
A

Cannon keratosis

70
Q
A

Lymphoedema

71
Q
A

Photoaggravated vasculitis

72
Q
A
  • “Mallenders amd Sallenders”
  • Common in cobs + draught breeds
  • Back of carpi, front of tarsi
73
Q

Dorsal distribution

A
74
Q
A

Herda

75
Q
A

Dermatophytosis

76
Q
A

Dermoid cysts = directly in midline

77
Q
A

Eosinophilic granuloma = off to side of midline (DDx = dermoid cysts)

78
Q

Facial distribution

A
79
Q
A

Papilloma

80
Q
A

Sarcoid

81
Q
A

Dermatophyte

82
Q
A

Papilloma

83
Q
A

Pemphigus foliaceus

84
Q
A

Depigmentation

85
Q

Tack sites distribution

A
86
Q
A

Eosinophilic granulomas

87
Q
A

Staphylococcal foliculitis

88
Q
A

Staphylococcal folliculitis

89
Q
A

Mechanical abrasion

90
Q
A

Dermatophyte

91
Q

What must be included on PPEs?

A
  • 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”

AAA Y4 SEM2 (8 decks)

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