Should i discard shoes i wore while i had athletes foot?

No: That is not necessary. But you should have the shoes disinfected with an antifungal solution or spray. These are often available at pharmacies or from podiatrist offices.

No: If your shoe is significantly soiled, was immersed in water or covered in a chemical that prevents breathability, i would recommend discarding the shoe, otherwise, treating the shoe with and antifungal powder can often be effective in preventing reoccurance.

Not necessary: Use lysol spray and let the shoes dry over night.