Ever since Seinfeld tackled the topic in 1993, weve known that double-dipping is socially unsavory.

But is it really a viable way for disease-carrying germs to spread?

Well, of course it is.

In some cases, the bacteria level was considerably higher than non-double-dipped bowls.

Presumably the acidity of the salsa can kill more bacteria, but this takes time.

Is double-dipping a food safety problem or just a nasty habit?| The Conversation viaRaw Story