I'm curious about how contaminants such as salmonella or listeria can infiltrate fruits like cantaloupes and tomatoes, or even vegetables like onions. What are the main ways this can happen?
3 Answers
One major route for contamination is through cuts made with knives. When you cut into any fruit or vegetable, any bacteria on the outside can get pushed inside. It’s also crucial to wash your produce when you bring it home and before using it on your cutting board.
Most contaminants are actually on the surface of the produce. When you slice open a cantaloupe or tomato without washing it first, dirt and bacteria can be smeared into the fruit. That's why it’s super important to wash everything properly before cutting!
A lot of pathogens are actually found in the soil, which is why you often hear about salmonella recalls with leafy greens. The environment where fruits and veggies grow can harbor these harmful bacteria, so they can easily transfer to the produce. Just like how tetanus is more likely from rusty nails that have been in the ground, the risk from produce comes from where and how they are grown.

Exactly! It’s not just a random occurrence. The bacteria have to be present in the first place, so it’s all about how the food is handled and grown.