The "Five-Second Rule" is FALSE ! ! !

Researchers at San Diego State University [SDSU], found that germs do in fact attach themselves to edible items within less than 5 seconds, the McClatchy-Tribune News Service is reporting.
According to a survey conducted in tandem with the study by researchers at SDSU, a reported 65 percent of parents admitted to implementing the five second rule in their homes.

CBS Atlanta



Presented as a Public Service by DonDiego.

So'K.
Kids don't eat a pound of dirt anymore- no dirt to be had.

Mythbusters did a show on this. Here is a blurb about it:

Test 1: MythBusters HQ samples
Jamie and Adam used contact plates to test various locations in the MythBusters shop for bacteria. Each contact plate was placed on the floor for five seconds and labelled with the location. They incubated the contact plates for 24 hours and then counted the number of bacteria on them.

They got different results from locations that were adjacent to each other, so they decided that it would be important to eliminate location as a variable in the test..

Mini-myth: Toilet seat is the cleanest spot in the house
While they were collecting samples around the shop, Adam also placed a contact plate on the toilet seat for comparison. It did have less bacteria colonies than the other samples, though it seems that the other samples were all collected from the floor.

Test 2: Evenly contaminated surface
In order to eliminate location as a variable they created some evenly contaminated surfaces with beef broth. They dropped wet food (pastrami) and dry food (cracker) onto the surface for two and six seconds. They also did a control sample for comparison.

The wet pastrami picked up more bacteria than the dry crackers, but there wasn't a discernable difference between the two-second and six-second samples. They would need to do more testing to single out time as a factor in the test.

Jamie: "I don't think the results were all that conclusive."

Mini-myth: Dog mouths are cleaner than human mouths
Adam and Lulu the Dog both licked a contact plate. After incubating the samples, the dog's sample had less bacteria colonies than Adam's.

Adam: "I don't eat my own poo"

According to LiveScience: "Despite a habit of licking things no human would dare, Fido's mouth is often touted as scientifically more sterile. Truth is, oral bacteria are so species-specific that one can't be considered cleaner than the other, just different."

Test 3: Contact plates on evenly contaminated surface
They decide to eliminate food as a variable in the test and instead just apply the contact plates to the beef brothed surface for two seconds and six seconds. Both showed tremendous amounts of bacteria with no real difference based on time.

They found that the amount of bacteria that was picked up depended on the moisture of food, the surface geometry of food, and the location that it was dropped on, but there was no correlation to the amount of time it was dropped.

mythbusted

You can likely eat something thats been on the floor for an hour and suffer no ill effects.
Its just kinda gross is all.

I make sterile drugs and we do environmental monitoring. Contact plates, settling plates. There is no variable of how long you contact with a contact plate, just touch and go.

As long as the bioburden is low enough and the bacteria are not pathogens, you'll be ok.

It's good to give the 'ol immune system a workout now and then, keep it on its toes for when it's really needed.

So can you give us a point of reference? For example what would the bioburden be on the Carpet at Circus Circus compared to say....The restrooms at the old Western?

TNTC but I'd eat a chip off the CC carpet before the old Western restrooms.