Microsporum equinum is a type of fungi known as dermatophyte, which have the ability to utilise keratin as a nutrient source, i.e. they have a unique enzymatic capacity [keratinase]. It is responsible for causing dermatophytosis (ringworm) in mainly cattle, but has also been known to infect horses and other animals. It is most often found on the saddle area, flank, and girth of horses. M. equinum is distributed worldwide.
M. equinum can be disinfected using diluted (1:10) bleach solution.