Category Archives: Diagnostics

Apoquel shortage? Try RESPIT!

By Jon Plant, DVM, DACVD Bad news, good news about Apoquel® from Zoetis (NYSE: ZTS). We learned last week that the Apoquel backorder situation is likely to continue throughout 2014 and into the summer of 2015. That is very sad … Continue reading

Posted in allergic dermatitis, apoquel, Atopic Dermatitis, immunotherapy, intradermal test, RESPIT, serum IgE test | Tagged , , , , , , , , , , , , , , | 4 Comments

Why aren’t there more randomized controlled trials on allergy immunotherapy in dogs?

By Jon D. Plant, DVM, Dipl. ACVD Long before I developed regionally-specific immunotherapy (RESPIT), I was interested in studying the efficacy of allergen-specific immunotherapy (ASIT) in dogs. Why?  The only placebo controlled study on ASIT, although a noble effort, had … Continue reading

Posted in Atopic Dermatitis, immunotherapy, intradermal test, serum IgE test | Tagged , , , , , ,

The efficacy of oromucosal or sublingual immunotherapy in dogs

by Jon Plant, DVM, DACVD Two routes of administration may be used for allergen immunotherapy: subcutaneous injection or oromucosal  / sublingual.  The subcutaneous route has been in use in humans and animals for more than 50 years.  After an initial … Continue reading

Posted in Atopic Dermatitis, immunotherapy, intradermal test, serum IgE test | Tagged , , , , , , ,

Intradermal testing reliability in dogs

This month I will review the reliability of “allergy” testing in dogs.  If you are going to recommend allergy testing to clients, you should understand their limitations.  The topics I have planned for the coming weeks are: Intradermal testing reliability … Continue reading

Posted in Atopic Dermatitis, Diagnostics, intradermal test | Tagged , , , , , , | 2 Comments

Getting the most from your skin biopsies

It’s frustrating for you and your clients if a skin biopsy result comes back non-diagnostic. Here are some of the things I do to get the most information that I can from dermatopathology. 1. For inflammatory skin diseases, do not … Continue reading

Posted in dermatopathology, Diagnostics | Tagged , , , , , ,

Skin cytology: let the lesion morphology guide your technique

When it comes to taking samples for skin cytology, there is no one technique that is best in every situation.  Here are my favorite techniques, and when I find them most useful: 1.      Cellophane tape stripping is the technique that … Continue reading

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The quick and dirty on ear canal cytology

Continuing with my focus on diagnostic tips, today I’ll share my approach to ear canal cytology in dogs and cats.  As you know already, this is a simple, but valuable test that should be recommended whenever otitis externa is suspected, … Continue reading

Posted in Diagnostics, Otitis | Tagged , , , , , , , ,

Tips for interpreting your DTM cultures

One of the topics that veterinarians ask me about most frequently is how to interpret fungal cultures grown on dermatophyte test medium (DTM).  The fungal culture is an important early step in working up many presentations, including folliculitis, patchy alopecia, … Continue reading

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Diagnosing Canine Atopic Dermatitis

How do you diagnose atopic dermatitis in a dog?  That’s right.  Based upon clinical features.  Serum IgE and intradermal testing can be used to identify potential allergens, but the tests are not sensitive or specific enough to rely upon for … Continue reading

Posted in Atopic Dermatitis, Diagnostics | Tagged , , , ,

5 Tips for Better Skin Scrapings

What can I possibly teach you about that most basic test in veterinary dermatology, the skin scraping? Taking a skin scraping seems like a simple enough technique, yet at least once per month I am able to find a mite … Continue reading

Posted in Diagnostics, Parasites | Tagged , , , , , , , , | 2 Comments