Cat poop can have parasites in it, such as tapeworms, roundworms, and hookworms, as well as bacteria, such as E. coli or Salmonella. It can be potentially dangerous in the vegetable garden. It’s one of the reasons why we shouldn’t flush their feces down the toilet, either. However, if you wear gloves, wash your hands well, and give any vegetables a good rinse and scrub with a veggie wash, the chances of infection are greatly reduced.