By M. canis and M. distortum these symptoms can appear much stronger. It is helpful to use a Woodlamp when determining any further spreading of the nodes as they show up a fluorescent greenish-white colour. Alopecia areata and Trichitillomania should be especially excluded through differential diagnoses. The infections caused by M. audounii are highly contagious and can break out regularly. Infections caused by the zoophile germ M. canis are only rarely passed from person to person, so that children with the infection can still go to school or nursery.
Normal therapy follows systemically.