Clinical Atlas of Canine and Feline Dermatology

Kimberly S. Coyner, Kimberly S. Coyner

• Publisher: Wiley-Blackwell
• Year: 2019
• ISBN:
  9781119226314
• Edition: 1
• Topic: Medicina
• Subtopic: Medicina veterinaria

Clinical Atlas of Canine and Feline Dermatology presents more than a thousand high-quality color photographs depicting common dermatologic diseases and conditions, making it easy for clinicians to quickly evaluate and accurately identify clinical dermatologic lesions. Easy-to-use charts of dermatologic diseases provide differential diagnoses and treatments, helping practitioners to quickly find the most common differential diagnoses, perform appropriate diagnostics, and treat their patients.

Written by experienced veterinary dermatologists, the book begins with chapters on essential dermatologic diagnostics and identification and interpretation of skin lesions, featuring pictorial illustrations with commentary of the most common causes. Diagnostic algorithms for pruritus and alopecia simplify the workup of these very common presenting symptoms, and easily referenced tables detail the presentation, diagnosis, and management of hundreds of skin diseases. The book also offers a dermatologic formulary including systemic and topical therapies.

• Provides more than 1200 images showing the most encountered dermatologic conditions in dogs and cats
• Includes easy-to-interpret charts of differential diagnoses and treatments
• Offers diagnostic and treatment algorithms for the most common skin diseases in dogs and cats
• Presents details of the presentation, diagnosis, and management of hundreds of skin diseases in tables for quick reference
• Features video clips on a companion website demonstrating dermatologic diagnostic techniques, including skin scrapings and cytology, aspiration of skin masses for cytology, and biopsy

Offering fast access to practical information for diagnosing and treating dermatologic disease in small animal practice, Clinical Atlas of Canine and Feline Dermatology is an essential book for any small animal practitioner or veterinary student.

1
Dermatology diagnostics

Kimberly S. Coyner, DVM, DACVD

Dermatology Clinic for Animals, Lacey, WA, USA

Indications:

• All cases with hair loss, scaling, crusting, papules, pustules, lichenification, or otitis should be screened for infectious organisms with skin scrapings and surface skin cytology; flea combing to screen for fleas and flea feces as well as for lice is also necessary, even in indoor pets.
• These quick and easy in‐house tests will not only allow for the accurate diagnosis of the dermatitis and guide appropriate therapy, but are also revenue generators.
• Additionally, with the emerging problem of antibiotic‐resistant bacterial skin infections, cytology to monitor response to antimicrobial therapy is important and can guide decisions about culture submission.
• The first important consideration is to buy a good microscope! There are numerous affordable, high quality microscopes available; I use the Swift M10 series biological lab microscope, but there are many other options.
• It is important to teach our veterinary technicians and assistants how to appropriately take care of microscopes, and there are numerous online resources including http://micro.magnet.fsu.edu/primer/anatomy/cleaning.html.

1.1 Skin scrapings (See video on companion website)

• Skin scrapings are used to diagnose mites such as scabies, Demodex, and Cheyletiella.
• A dulled #10 scalpel blade or medical curette/spatula and mineral oil are used to collect skin debris (Figures 1.1–1.4), which is then mixed with more mineral oil on a microscope slide and observed under 4–10×, with the condenser down for maximum contrast.
• For scabies, multiple wide superficial scrapings of crusted, papular, or alopecic lesions on elbows, pinnal margins, and ventral trunk should be obtained (Figures 1.5 and 1.6).
  1. The mites live in the stratum corneum and are often few in number, and consequently false negative scrapings are common, so any animal with pruritus consistent with scabies should be trial‐treated with appropriate acaricidal therapy.
• For surface living Cheyletiella mites, wide superficial scrapings of scaly lesions are obtained; these large surface‐dwelling mites are quite visible on 4× magnification (Figure 1.7).
  1. Mites can also be low in number, and as for scabies empiric acaricidal therapy is often prescribed in suspect cases.
  2. In some cases, Cheyletiella mites can be found using multiple applications of clear acetate tape onto scaly areas; after sample collection the tape is applied to a microscope slide (no oil or stain is used) and observed under 4×.
• Demodex mites live in hair follicles and so require deeper skin scrapings.
  1. The dulled blade is scraped briskly in one direction on the skin (be careful not to press down on the blade which could cause cutting of the skin) until capillary oozing is observed on the skin as well as...

Table of contents

• Cover
• Table of Contents
• List of contributors
• Preface
• Acknowledgments
• About the companion website
• 1 Dermatology diagnostics
• 2 Dermatology lesions and differential diagnoses
• 3 Lesion location and differentials
• 4 Causes and workup for pruritus in dogs and cats
• 5 Causes and workup for alopecia in dogs and cats
• 6 Breed‐related dermatoses
• 7 Parasitic skin diseases
• 8 Bacterial, fungal, oomycete, and algal infections
• 9 Viral, rickettsial, and protozoal dermatologic diseases
• 10 Allergic skin diseases in0 dogs and cats
• 11 Autoimmune and immune‐mediated dermatologic disorders
• 12 Endocrine skin diseases
• 13 Non‐endocrine alopecia
• 14 Diagnosis and treatment of acute and chronic otitis
• 15 Metabolic/nutritional/keratinization dermatologic disorders
• 16 Congenital/hereditary dermatologic disorders
• 17 Pigmentary dermatologic disorders
• 18 Environmental skin disorders
• 19 Skin tumors
• 20 Dermatology formulary
• Index
• End User License Agreement