Bond R, Morris DO, Guillot J Biology, diagnosis and treatment of Malassezia dermatitis in dogs and cats. Vet Dermatol. 2020; 31:(1)73-77

Carlotti DN, Guinot P, Meissonnier E, Germain PA. Eradication of feline dermatophytosis in a shelter: a field study. Vet Dermatol. 2010; 21:(3)259-266

Today's Daily Dose: Mackenzie toothbrush technique. (accessed 6 October 2021)

Dedola C, Stuart APG, Ridyard AE Cutaneous Alternaria infectoria infection in a dog in association with therapeutic immunosuppression for the management of immune-mediated haemolytic anaemia. Vet Dermatol. 2010; 21:(6)626-634

Frymus T, Gruffydd-Jones T, Pennisi MG Dermatophytosis in cats. J Feline Med Surg. 2013; 15:(7)598-604

Guillot J, Bond R. Malassezia yeasts in veterinary dermatology: an updated overview. Front Cell Infect Microbiol. 2020; 10

Kaufmann R, Blum SE, Elad D, Zur G. Comparison between point-of-care dermatophyte test medium and mycology laboratory culture for diagnosis of dermatophytosis in dogs and cats. Vet Dermatol. 2016; 27:(4)284-e68

Makri N, Paterson GK, Gregge F, Urquhart C, Nuttall T. First case report of cutaneous sporotrichosis (Sporothrix species) in a cat in the UK. J Feline Med Surg Open Rep. 2020; 6:(1)

Moriello KA, Coyner K, Paterson S, Mignon B. Diagnosis and treatment of dermatophytosis in dogs and cats. Vet Dermatol. 2017; 28:(3)266-e68

Moriello K. Dermatophytosis in cats and dogs: a practical guide to diagnosis and treatment. In Pract. 2019; 41:(4)138-147

Negre A, Bensignor E, Guillot J. Evidence-based veterinary dermatology: a systematic review of interventions for Malassezia dermatitis in dogs. Vet Dermatol. 2009; 20:(1)1-12

Tyler S, Swales N, Foster AP, Knowles TG, Barnard N. Otoscopy and aural cytological findings in a population of rescue cats and cases in a referral small animal hospital in England and Wales. J Feline Med Surg. 2020; 22:(2)161-167

Fungal infections in cats and dogs

02 October 2021
9 mins read
Volume 12 · Issue 8
Figure 1. Malassezia pododermatitis in a dog with underlying atopic dermatitis.


Fungal infections are an easily diagnosable cause of skin disease in companion animals. This article aims to give an overview of the more common fungal infections seen in cats and dogs, how to investigate them, and how to treat them. A small section on rarer fungal infections is included for information. Veterinary nurses are often involved in dermatology clinics, so knowledge of both common and rarer dermatomycoses can be very useful.

Fungal infections are an important cause of dermatoses in cats and dogs that can be investigated by veterinary nurses in general practice and treated under veterinary direction. When working up a skin case at first presentation, mycoses (conditions caused by fungi) should be on the differential list, however some mycoses are more common than others. This article aims to provide a brief overview of the presentation, aetiology, diagnosis, and treatment of various dermatomycoses.

Malassezia is a genus of lipid-dependent yeasts that can be found as part of the normal flora on the skin of many animals. The most common species in dogs and cats is Malassezia pachydermatis, (Guillot and Bond, 2020) although there are several others, including Malassezia furfur and Malasse-zia sympodialis that can be seen in other animals as well as cats. Malassezia spp. dermatitis or otitis are the most common fungal skin infections seen in dogs (Bond et al, 2020); and studies have indicated that the peri-oral region and interdigital skin is frequently colonised (up to 80%) by M. pachydermatis in healthy dogs of various breeds (Guillot and Bond, 2020). Malassezia organisms were also found on cytology from the ears of over a third of cats in one study, and are known to be part of the normal ear flora (Tyler et al, 2019), although the prevalence of Malassezia spp. causing disease has not been fully investigated.

Register now to continue reading

Thank you for visiting The Veterinary Nurse and reading some of our peer-reviewed content for veterinary professionals. To continue reading this article, please register today.