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1276 Pyoderma Red Eye: Differential Diagnosis

Pyoderma
VetBooks.ir Surface Pyoderma Mucocutaneous pyoderma:

Pyotraumatic dermatitis (acute moist dermatitis, hot spots):
Pyotraumatic folliculitis and furunculosis, demodicosis, dermatophytosis, Intertrigo, Malassezia dermatitis, localized demodicosis, early discoid lupus
erythematosus, zinc-responsive dermatosis, autoimmune skin diseases
neoplasia, cutaneous metastasis, fixed drug eruption, early necrotizing (DLE, SLE, PV, BP), epitheliotropic lymphoma (mycosis fungoides)
form of idiopathic nodular panniculitis, early localized vasculitis Deep Pyoderma
Intertrigo (skinfold pyoderma): Pyotraumatic folliculitis and furunculosis:
Localized demodicosis, mucocutaneous pyoderma, dermatophytosis, Pyotraumatic dermatitis/acute moist dermatitis (hot spot), demodicosis,
Malassezia dermatitis, candidiasis, superficial necrolytic dermatitis, neoplasia, cutaneous metastasis, fixed drug eruption, idiopathic
zinc-responsive dermatosis nodular panniculitis, localized vasculitis
Bacterial overgrowth: Muzzle folliculitis and furunculosis (canine acne):
Malassezia dermatitis, atopic dermatitis, food allergy Localized demodicosis, dermatophytosis, early juvenile cellulitis,
Superficial Pyoderma eosinophilic furunculosis, contact dermatitis
Impetigo (puppy pyoderma): Pedal folliculitis and furunculosis:
Superficial bacterial folliculitis, demodicosis, dermatophytosis, early scabies Pelodera dermatitis, dermatophytosis, subcutaneous and systemic
Superficial bacterial folliculitis: mycoses, opportunistic fungal diseases, mycobacterial diseases,
Impetigo, exfoliative superficial pyoderma, dermatophytosis, demodicosis, interdigital pyogranulomas, neoplasia
sarcoptic acariasis, flea allergy dermatitis, pemphigus foliaceus, Callus/pressure-point pyoderma: acral lick dermatitis, focal actinic comedones,
urticaria, drug eruption, erythema multiforme, sterile eosinophilic sarcoptic acariasis
pustulosis, leishmaniasis German shepherd dog pyoderma:
Exfoliative superficial pyoderma: Demodicosis with secondary deep pyoderma, subcutaneous and deep
Superficial bacterial folliculitis, dermatophytosis, demodicosis, pemphigus mycoses, opportunistic fungal infection, idiopathic nodular panniculitis,
foliaceus vasculitis
BP, Bullous pemphigoid; DLE, discoid lupus erythematosus; PV, pemphigus vulgaris; SLE, systemic lupus erythematosus.
Reproduced from the third edition in unabridged form.
THIRD EDITION AUTHOR: Manon Paradis, DMV, MVSc, DACVD

Red Eye: Differential Diagnosis

Parameter Anterior Uveitis Conjunctivitis Superficial Keratitis Glaucoma
Conjunctiva Not thickened, vessels easily seen Thick, folded, and hyperemic, Not thickened Not thickened
vessels concealed
Conjunctival vessels Circumcorneal and straight, not movable Superficial, diffuse, and tortuous Diffuse, vessels form fine Diffuse, superficial,
with conjunctiva network in vicinity of cornea and prominent
Secretion or discharge None Moderate to copious Serous to purulent None
Pain Moderate Severe Moderate to severe Severe to acute
Photophobia Moderate None Severe Slight
Cornea Clear to steamy Clear Clouded to opaque Steamy
Pupil size Small, sluggish, irregular, or fixed Normal Normal Dilated, moderate to
complete, and fixed
Pupillary light reflex Poor Normal Normal Absent
Intraocular pressure Variable; typically low/diminished acutely Normal Normal Elevated
NOTE: These disorders often do not exist in isolation, and features of two or more disorders may be present simultaneously, may negate each other, or may be additive.
With permission from Lavignette AM: Differential diagnosis and treatment of anterior uveitis. Vet Clin North Am 3:504, 1973. Modified from Slatter D: Fundamentals of veterinary ophthalmology, St. Louis,
2001, Saunders.

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