Dermatology part 2 2016 NT CS.pptx

Dermatology part 2 2016 NT CS.pptx - Canine and Feline...

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Canine and Feline Dermatophytosis Infection of keratinised tissues (epidermis, hair, claws) Etiology: three genera of fungi : Microsporum, Trichophyton , Epidermaphyton (M. Canis) Ringworm” Mostly in younger cats and dogs Animals can be asymtomatic carriers I n majority of infections-found in environment, spores can live for yrs Transmission: Direct contact, fomites 1
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Ringworm Clinical signs: +/- pruritis +/- alopecia +/- scaling Diagnosis Hx of someone/pet in household that is + Woods lamp(only 60-80% fluoresce) Fungal Culture Microscopic exam 2
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DX: Woods Lamp In only 50 - 60% of Microsporum canis infections there will be greenish fluorescence(false negatives)
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Ringworm *Zoonotic* Spread by contact with affected animals to human or human to animal spread 4
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Treatment Systemic therapy: for generalized or multifocal Itraconazole(Sporonox) Potential hepatotoxicity, liver enzymes q. 2-4 wks $$- expensive Topical treatments and clipping Rinses(lime sulfur dips) Creams, ointments, lotions Antifungal shampoo(ketoconazole, miconazole) Environmental management(dilute bleach) M. canis can remain infective in the environment up to 18 months! What are we supposed to say when a client lifts up their shirt to show us a lesion of their own?? Don’t forget to treat any secondary bacterial pyodermas!
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Allergies in dogs and cats Manifested through skin(vs. humans) HALLMARK SIGN : PRURITIS! Frustrating, hard to manage, chronic Diagnosis for life Need to find right “recipe” for treatment, no one magic drug
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Canine Organs Affected by Corticosteroids CNS • Polydipsia / Polyuria • Mood changes LYMPH NODES • Suppression of        the immune system • Lymphopenia HEART &  BLOOD VESSELS • Water retention • Muscle weakening MUSCLE • Thinning • Weakness • Pendulous abdomen • Temporal muscle atrophy REFERENCE:  Boothe, Dawn Merton.  Small Animal Clinical Pharmacology and Therapeutics . WB Saunders. Philadelphia 2001. P326-228. LIVER • Fat    accumulation • Elevated    liver enzymes ADRENAL GLANDS • Suppression or iatrogenic hyperadrenocorticism           (Cushing’s disease) KIDNEYS • Polyuria • Altered electrolyte balance • Protein losing glomerulonephropathy PANCREAS • Predisposed for type II diabetes • Predisposed for pancreatitis BLADDER • Increased susceptibility     to infection SKIN & FUR • Hair loss • Thinning of the skin • Increased susceptibility       to infection • Calcinosis cutis
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Allergic Dermatitis Pets can have a combination of all 3 allergy types: 1.
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