Radfordia affinis is a species of mite. Lesions vary from mild to severe. Initially there is mild hyperkeratosis, but this often progresses to severe hyperkeratosis with fine bran-like material on the skin over virtually all of the body. Mites can be seen anywhere on the body but are most numerous alongside the hair bases in the more densely furred parts of the body (i.e., over the head and back). Transmission is by direct contact but in general R. affinis is not a significant pathogen.