Ringworm (dermatophytosis) is a highly contagious fungal infection that spreads rapidly in shelter environments, requiring intensive management to protect individual and population welfare.
Ringworm causes welfare impacts through skin inflammation, hair loss, and the pruritus associated with active lesions. However, the more significant welfare concern in shelter contexts is the isolation and extended hospitalization required to treat affected cats. Cats held in isolation for months while completing ringworm treatment experience the compounding welfare harms of shelter stress plus social isolation. Efficient outbreak control that reduces treatment duration and the number of affected individuals is therefore the most important welfare intervention in shelter ringworm management.