Latest Issue of Science News


Undercooking makes germs strong

Food safety experts always advocate cooking meat carefully–especially ground-meat products–so that even the core reaches germ-killing temperatures. But a new federal study demonstrates that precooking servings to sublethal temperatures before the final cooking actually makes germ killing more difficult.

Food microbiologist Vijay K. Juneja of the Agriculture Department's Eastern Regional Research Center in Wyndmoor, Pa., studied ground beef inoculated with Escherichia coli O157:H7. This bacterium infects a large proportion of cattle entering U.S. slaughterhouses (SN: 3/25/00, p. 199). If it survives to the dinner table, it can trigger lethal hemorrhagic food poisoning (SN: 7/22/00, p. 53).

Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.

This article is available only to subscribing members. Join SSP today or Log in.