Does the 5 second rule really work?

- We're on constant alert making sure the food we eat is safe: reading labels, monitoring food recalls, and avoiding restaurants with E. coli outbreaks. So why do we place so much faith in The 5 Second Rule?

Is it even scientifically sound? Food science professor Dr. Paul Dawson, who conducted the only 5 second rule study ever published, has weighed in. And like most things: it depends.

When the researchers dropped bread and bologna on the floor, it didn't matter how long they were in contact with the floor. They picked up bacteria. However, there were two factors that did matter in how contaminated the makings of the sandwich got.

First, how dirty the patch of floor was: the more bacteria on the floor, the more that was immediately transferred to the food. So it's not how long it's there, it's how infected the surface is.

And second, the type of surface. Looks like maybe you should install that shag carpet in your kitchen. Dawson writes "When carpet was inoculated with salmonella, less than 1% of the bacteria were transferred. But when the food was in contact with tile or wood, 48-70% of bacteria transferred."

So "The 5 Second Rule" is out. Maybe you think it's been replaced with "The Clean Carpet Rule." But why risk it?

 

Up Next:


  • Popular

  • Recent

WATCH FOX 7 NEWS LIVE

FOX 7 News streams at the following times (all times Central):


Monday - Friday

4:30 a.m. - 10 a.m.

12 p.m. - 12:30 p.m.

5 p.m. - 6 p.m.

9 p.m. - 10:30 p.m.

Saturday

6 a.m. - 8 a.m.

6 p.m. to 6:30 p.m.

9 p.m. to 10 p.m.

Sunday

6 a.m. - 8 a.m.

5 p.m. to 5:30 p.m.

9 p.m. to 10 p.m.



Schedule subject to change in the event of network sports coverage.

We also stream press conferences and other breaking news coverage from time to time. When we are not in a live newscast, you will see replays of the most recent broadcast.

To enter full screen Mode click the button.

For closed captioning, click on the button while in full screen mode.

Desktop/tablet users: To choose the stream's video quality, click on the button (while in full screen mode) and choose from 432p or 270p.

Mobile users:The video quality default is to your phone's settings.

Please allow time for buffering. If the stream stalls, refresh your browser. Thanks for watching

Stories You May Be Interested In - Includes Advertiser Stories