Seborrhea In Dogs

Transcription

Seborrhea In Dogs
Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Seborrhea In Dogs
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Management in Shelters
and Foster Homes
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Karen Moriello, DVM, DACVD
Clinical Professor of Dermatology
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University of Wisconsin-Madison
Madison Wisconsin, USA
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‘Seborrhea’- term is obsolete
Correct term: cornification defect
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Excessive scales (flakes, ‘dandruff’) with or without oily skin
and hair.
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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‘Seborrhea’ is….
• Clinical description, not a diagnosis
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• Disruption in production epidermal cells and
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• Causes
• Primary-Hereditary-noted early in life, life long
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• Secondary-acquired, occurs as a result of other diseases,
temporary
• Most common in dogs
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Odor and scales that do not wash off…
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Practical Anatomy
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www.google. images
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Cornification
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Importance of Epidermal Barrier
• Prevents excessive water loss from skin
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• Prevents loss of other bodily fluids
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• Protects against UV damage
• Protects against trauma
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• Part of the body’s immune system
• Prevents against infection and invasion of micro-organisms
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Pathogenesis of Clinical Signs
• Accumulations of scale and crust because of shortened
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epidermal cell turnover
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• Irritation, inflammation, pruritus and odor develop
because of changes in the composition of surface oils
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• Frequent bacterial and yeast overgrowth/infections
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often with pruritus due to changes in the skin flora
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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‘Seborrhea sicca’-dry
‘Seborrhea oleosa’-greasy
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• Clinical descriptors
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• Not a specific disease
• Only of importance when determining topical therapy
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• Avoid use of these terms!!!!
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Primary Cornification Defect
• Hereditary with breed predisposition or random genetic
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abnormality
• Noted early in life for many conditions
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• Manage, not cure
• Diagnose via ruling out other causes
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Primary Breed Predisposition
• Primary cornification disorder
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• West Highland white terrier, cocker spaniel, basset hound, Doberman
pincher, German shepherd, English springer spaniel, Irish setter,
Labrador retriever
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• Vitamin A-most notably cocker spaniel
• Zinc responsive
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• Alaskan malamute, Siberian husky, Samoyed, Pharaoh hound
• Epidermal dysplasia-West Highland white terrier
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• Ichthyosis-golden retrievers, Jack Russell terrier, Norfolk terrier,
American bull dog
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Primary Cornification
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Severe Odor
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Vitamin A
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Zinc
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Ichthyosis
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Really, really big scales
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Localized Disease
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Localized Disease
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Localized Disease
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Secondary Cornification
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• Secondary to ANY disease that affects the skin
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• Parasites
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• External
• Internal
• Infections
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• Allergies
• General illness
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• Chronic nutritional deficiencies
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Secondary to
bacterial pyoderma
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Secondary to parasites….
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Secondary to yeast overgrowth
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Common problem in allergic dogs..
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Common in dogs with medical illnesses..
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Common Scenario
ITCH
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INFECTION
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Spending Money Wisely
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• Consider global health of dog and address issues
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• Vaccination
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• Nutrition
• Endo-parasite control
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• Assume seborrhea is secondary, until proven otherwise
• Ectoparasite control
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• Skin cytology for bacterial or/yeast overgrowth
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What does this ‘look like’?
• Intake: vaccinations, standard deworming, appropriate diet
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and adequate feeding
• Flea control/contagious parasite treatment q 2 weeks for 6
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weeks
• In house diagnostics
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• Hair trichogram to look for demodicosis
• Skin cytology for yeast
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• Wood’s lamp-high risk of false positives
• Bacterial overgrowth is common, at least treat topically
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Other Diagnostics
• If animal is otherwise healthy, routine laboratory work is
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rarely helpful
• Allergy work up?
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• Thyroid function tests?
• Adrenal function tests?
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• Skin biopsy indications
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Diagnosis Via Biopsy
• Vitamin A responsive skin disease
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• Zinc responsive skin disease
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• Medical conditions-cutaneous lymphoma
• Sebaceous adenitis
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• Lichenoid psoriasiform dermatitis of springer spaniels
• Nasal parakeratosis-when ruling out from immune mediated
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• Maybe helpful in ichyosis, primary cornification diseases..
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Lichenoid psoriasiform dermatitis
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Bathing and Grooming
• Always indicated
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• Cannot over bathe the dog
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Topical Therapy-What You Need
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• ONE cleansing shampoo
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• One combined antibacterial/antifungal shampoo
• One combination tar and sulfur or salicylic acid shampoo
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• One good degreasing shampoo
• Benzoyl peroxide (degreasing and antimicrobial)
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• One moisturizing product
• 50% propylene glycol
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• Commercial product
• One non-irritating ear cleaner
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Shampoo Therapy Simplified
• Step 1: Instill ear cleaner
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• Step 2: Bathe dog in a cleansing shampoo to remove debris
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• Apply pre-diluted shampoo (1:2 - 1:4), wash, rinse
• Step 3: Alternate bathing with antimicrobial shampoo and
anti-seborrheic shampoo
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• Apply pre-diluted shampoo (1:2 - 1:4), wash, rinse
• Rinse again and again
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• Step 4: Finish cleaning ears
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Seborrheic Otitis
• Increased ear secretions
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• Ceruminous otitis leads to bacterial overgrowth and chronic
inflammation and ODOR
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• Treat microbial overgrowth
• Clean ears at every bath
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• Topical ear steroids maybe very helpful
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• 1:1 dilution of propylene glycol and 2mg/kg of dexamethasone
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How Often???
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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Nasal and Digital Hyperkeratosis
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Ear Margin Hyperkeratosis
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Medical Treatment?
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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What Foster Families Can Do
• Dog with chronic seborrheic otitis
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• Important to determine if medical or surgical
• 30 day treatment period needs to be done in a home
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• 1 mg/kg orally once daily for 15-30 days
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
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For example…..
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Dog that needs temporary intensive
bathing to achieve remission
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Or this….. Do not squeeze!
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Stopping the Scales, Greasiness and Odor of Seborrhea in Shelter and Foster Home Dogs
May 21, 2015
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Transitioning to a Permanent Home
• Information on what best controls the odor and scale
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• What’s the most you have to do and when?
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• What are the early signs of a relapse?
• What products work? Or what products are irritating?
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• Information on all diagnostic testing
• Is problem secondary?
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• If secondary what does new primary care veterinarian need to
pursue?
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www.vetmed.wisc.edu
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