The most basic way to prevent exposure to these germs for both you and your cat is to prevent the problem. First, wash your pet bowls before every feeding, or at the very least, every day. For many cat parents, this is not a common practice if cats are left to graze from their bowls all day. However, washing them every day will prevent a buildup of salmonella, E. Coli, yeast, and mold.
According to Clean Healthy BOWLs, more laboratory tests proved that 75% of pet bowls still had traces of salmonella after handwashing, and 67% of bowls ran through a dishwasher had small traces.