Feline demodicosis: a consideration in the itchy or overgrooming cat

Abstract

Practical relevance: In cats, three species of demodex mites have been identified as causes of demodicosis, which may manifest as pruritus, miliary dermatitis and/or self-induced alopecia. The condition has been recognized in various countries but does seem to show regional preferences.

Clinical challenges: Diagnosis of feline demodicosis can be a challenge as mites are not always readily found within scrapings of the skin examined microscopically. One or more species of demodex mite may be involved in an infestation. Furthermore, the condition can be difficult to treat effectively.

Audience: This review is intended as a clinical update for veterinary surgeons in practice who rarely encounter demodicosis.

Figure 1

Demodex gatoi mite. Magnification x 100

Figure 2

Two-year-old female neutered domestic shorthair cat with broken, barbered hair dorsally and an alopecic ventrum associated with D gatoi infestation

Figure 3

Cat with D gatoi infestation undergoing a lime sulfur dip

Figure 4

The same cat as in Figure 2 following a series of six weekly lime sulfur dips

Figure 5

Furunculosis of the chin of a Siamese cross cat associated with D cati infestation

Multiple D gatoi mites found on superficial scrapings from the asymptomatic housemate of the cat