Derm's dirty Dozen, The top chronic, recurrent cases destined to cause frustration - DVM
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Derm's dirty Dozen, The top chronic, recurrent cases destined to cause frustration


DVM360 MAGAZINE


These cases are treated similarly as the others, but you may include so-called pulse therapy, which actually is a misnomer. You may offer antibiotics for long-term treatment by administering antibiotics several days of the week on and the remaining days of the week off. I also recommend using staphage lysate at 0.5cc subcutaneously twice weekly.

  • Disease 2:


Some candies prove toxic for dogs
Atopic dermatitis We could nickname this one the itch that won't go away! This condition is indeed very difficult to manage and equally frustrating. I will not go deep into the immunologic dysfunction of this condition, but it's worth repeating the fact that atopic dogs have a higher carriage of cocci with stronger adherence factors to epidermal corneocytes. This leads, in part, to recurrent pyoderma as previously described. They also are pruritic, so self-trauma potentiates pyoderma. These dogs start to manifest symptoms of pruritus less than 3 years of age (as early as 3-4 months) and can be affected seasonally or non-seasonally. Facial or pedal involvement is very common, as well as axillary pruritus, perianal pruritus, otic disease and groin involvement.

The main issue with atopic dermatitis is itch. Owners complain that this symptom is their biggest concern. Here is our job to help relieve the dog's pruritus and make everyone happy. I don't believe in long-term corticosteroid administration but the reality is, many cases respond only to this type of therapy. In mild to moderate cases, I strong advise antihistamine therapy accompanied by fatty acids given orally. The fatty acids should be comprised of omega-6 and omega-3 fatty acids in a 5:1 ratio, respectively. This type of therapy should be given for at least three to four weeks to evaluate effectiveness. I prefer diphenhydramine or hydroxyzine for antihistamine therapy. It is clear that the newer generation antihistamines, such as loraditine or cetirizine, are ineffective for the management of pruritus.

Topical therapy also can be prescribed with or without the antihistamine/fatty acid treatment and can include oatmeal shampoo with or without a topical anesthetic, witch hazel sprays, epidermal lipid-replacement therapy and corticosteroid-containing sprays. Recently, a new topical, low-potency corticosteroid spray has been introduced and appears to be very effective.

Concerns about iatrogenic Cushing's disease (at the site of repeated spraying) warrants close monitoring patients. Comedones (cream-colored or black), thinning skin and bruising are all warnings that corticosteroid therapy must cease. If oral corticosteroid therapy is administered for long-term therapy, I advise performing a urinalysis and aerobic culture (do not rely on the lab for culture, ask for it initially). About 20 percent of cases will have occult urinary tract infection.

Recently, modified cyclosporine has been approved for use in the dog. It has been available for many years for treatment of human diseases, so veterinary patients have benefited from this drug since 1995. This drug is an immunosuppressant, therefore careful patient selection and monitoring are in order when prescribing this drug. The drug suppresses non-stimulated T-cells, so its use in human patients extends to immune-mediated diseases, as well as the prevention of transplantation rejection. Feline patients have been prescribed this drug for the prevention of kidney transplant rejection as well. The dosage is 5mg/kg/day for atopic dermatitis and should be given on an empty stomach. It can take one to two weeks to take effect. The most common side effect is nausea and vomiting which, if mild to moderate, can be treated with famotidine one hour prior to administration.

Given with a full stomach can diminish absorption, so it is advised to administer cyclosporine one hour prior or two hours after a meal. This drug can be used for short to intermediate lengths of time. The long-term effects (greater than three years) has not been evaluated. It might be advisable in some cases to monitor kidney and liver functions, as well as cyclosporine plasma levels due to the unusual occurrence of toxicity at that dosage.

  • Disease 3:


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