Page 2448 - Cote clinical veterinary advisor dogs and cats 4th

1212.e2 Dermatoses, Scaling and Crusting

Dermatoses, Scaling and Crusting
VetBooks.ir Lesion

Disease
Bacterial Lesions Species Signalment Distribution Frequency Pruritus Diagnosis
Superficial folliculitis Crusts, scales, collarettes, Dog > cat Varies Trunk C − to + + CS, Cyt, BC, Bx
pustules
Deep pyoderma Crusts, ulcers Dog > cat Varies Trunk, feet C + CS, Cyt, BC, Bx
Mucocutaneous Crusts, ulcers Dog German shepherd or Lips, peribuccal U + (painful) CS, Bx
pyoderma others
Acute moist Moist crust, exudation, Dog Any (often flea related) Face, neck, C + + + CS
dermatitis erythema caudal trunk
Fungal
Dermatophytosis Crusts, scales, alopecia, Cat > dog Young most frequently Head, extremities, C − to + + DTM, Wood’s
erythema trunk light
Malassezia Crusts, scales, erythema, Dog > cat Adult most frequently Axillary, groin, C + + + Cyt
dermatitis lichenification interdigital, facial
Parasitic
Ctenocephalides Scales, erythema Dog > cat Any Lumbosacral, C + CS, parasite
felis (flea) neck exam
Sarcoptes scabiei Crusts, scales, Dog Any Pinnal margins, C + + + SS, response
excoriations, alopecia, lateral elbows, to therapy
erythema ventrum
Demodex canis Crusts, scales, exudation, Dog Young or From single C − to + SS
alopecia, erythema immunocompromised lesions on
adults the head to
generalized
Cheyletiella spp Scales Dog, cat Young, most frequently Dorsal trunk to U − to + + + SS, tape
generalized impression
Notoedres cati Crusts, scales Cat Any Head, feet, U − to + + + SS
generalized
Viral
Feline leukemia virus Crusts, scales, erosions Cat Any Face, pinnae, U ++ Serology, Bx
(FeLV) perioral, feet,
trunk
Allergic Reaction
Atopic dermatitis Erythema, alopecia, crusts Dog > cat All, dogs often 1-5 Face, ears, feet, C + to + + + CS, IDST, IgE
(excoriation), scales, and years old ventrum
others
Food hypersensitivity Erythema, crusts Dog, cat All, any age Any C + to + + + Food trial
(excoriation), and others
Flea bite Erythema, crusts Dog, cat All Caudal dorsum, C + + to + + + Response to
hypersensitivity (excoriation), and others ventrum, thighs flea control
Miliary dermatitis Small hemorrhagic crusts Cat All (often associated Dorsum C + + CS
with fleas)
Endocrine and Metabolic
Hyperadrenocorticism Alopecia, cutaneous Dog > cat Middle-aged, older Trunk C − (occ. +) MDB, hormone
atrophy, calcinosis cutis, animals assays,
crusts (pyoderma) imaging, Bx
Hypothyroidism Scaling, dry skin, Dog Middle-aged, often Generalized C − MDB, thyroid
pyoderma, ± alopecia large breeds assay
Superficial Severe adherent crusting Dog (cat) Old Muzzle, footpads, R + to + + Bx, MDB,
necrolytic dermatitis pressure points (painful) liver assays,
(hepatocutaneous imaging
syndrome)
Immune-Mediated Disease
Pemphigus foliaceus Crusts, pustules Dog, cat Any age and sex; Nasal planum, U − to + Bx
Akita, chow chow, and muzzle, pinnae,
others footpads, trunk

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