Ringworm (dermatophytosis) is a common fungal infection in cats, particularly in shelters and multi-cat households. Prompt diagnosis and thorough environmental decontamination are key to welfare and control.
Ringworm causes welfare concerns through skin irritation, secondary bacterial infections from self-trauma, and the stress of prolonged treatment. Affected cats may scratch or over-groom affected areas causing additional skin damage. Treatment is prolonged — typically 6-12 weeks or longer — requiring patience and consistency from owners. Shelter cats with ringworm face particularly difficult welfare situations as treatment protocols require isolation that removes social contact. Environmental contamination with fungal spores is extensive and persistent, requiring thorough decontamination. The zoonotic risk means infected cats are sometimes surrendered by owners, creating an additional welfare crisis at the point of shelter entry.