Tinea corporis. Kittens appear to have a higher frequency of infection than adult cats, and shedding of the fungus occurs more during the winter months. In addition, cats that live both outdoors and indoors appear to be more commonly infected with M canis than do indoor cats.
Source: Prose NS, Kristal L. Weinberg's Color Atlas of Pediatric Dermatology, 5e; 2017.