Ringworm (dermatophytosis) is a fungal infection causing welfare problems in cats and posing human health risks. Shelter outbreaks are particularly challenging to manage.
Ringworm causes significant discomfort through pruritis and skin inflammation. In shelters, the infection is a major cause of extended stays and euthanasia in systems without capacity for extended treatment. Modern foster-based ringworm management has dramatically improved outcomes for affected cats. Treatment is effective but requires consistent application over weeks - a commitment that requires dedicated owner or foster education.