Your veterinarian will take
deep skin scrapings and examine them under the microscope to diagnose this disease.
Red Mange is usually diagnosed by presence of Demodectic canis mites in
deep skin scrapings.
Multiple
deep skin scrapings are recommended to detect the hair - follicle - dwelling D. cati mites.
Mange is very hard to detect by eye and even
deep skin scrapings are not always successful.
Not exact matches
In these situations, it may be difficult to determine how
deep to scrape, and it may be uncomfortable for the patient to have
skin scrapings performed while awake (Figure 10).
Skin scrapings to identify follicular Demodex species mites should be
deep enough to result in capillary bleeding.
If a
deep pyoderma is present,
skin scrapings may be falsely negative due to easy bleeding of the lesions with the scraping, and a biopsy may be necessary to rule out demodicosis.
Demodex cati lives
deeper in the
skin (inside hair follicles) so is not as easily licked away by the patient and is somewhat more amenable to detection in
scrapings.