Ringworm is most commonly tested in cats by use of a black light (a Wood’s lamp). Some fungal spores glow green under the black light, which would indicate ringworm.

Ringworm is most commonly tested in cats by use of a black light (a Wood’s lamp). Some fungal spores glow green under the black light, which would indicate ringworm.

Ringworm in cats is contagious to other animals, including humans. Ringworm can live for up to 18 months in the environment on items such as brushes, pet beds, furniture, carpeting, and bowls.