Yes, you should change the air filters in your forced air units to catch the ringworm spores as they easily travel through your house. You shoudl use a filter rated for allergies and fine dust. Use a hospital grade disinfectant, like our PuraCleenRx Disinfectant Spray, to clean all surface areas and floors in your home.
Wash all clothes and linens in hot water and PuracleenRx Xtreme Cleen to kill spores. Vacuum daily and dispose of the bag, then spray the vacuum with disinfectant.