Raw green onions are a staple in kitchens worldwide, but their structure makes them more vulnerable to contamination than many other vegetables. Food safety experts point to two specific characteristics — hollow stalks and ground-level growth — that allow bacteria and parasites to take hold in ways a casual rinse may not resolve.
In brief
- —Hollow stalks can trap Salmonella, E. coli or Cyclospora inside
- —Ground-level growth means direct contact with contaminated soil
- —A quick tap rinse is often not enough, experts warn
Hollow stalks: how bacteria get trapped inside scallions
Green onions grow as hollow, tubular stalks. As they push upward through the soil, that open structure acts as a channel — dirt, small insects, and microscopic pathogens can work their way inside the layers rather than simply sitting on the outer surface.
