Wooden chopping Boards kill bacteria

I have always loved real wood, especially English oak, ash, beech and maple to name a few.
I have long thought that my wooden chopping board was self curing to a degree but only recently did i try to find some evidence to support that idea.

And I quote:  'EVERY now and then a scientific finding flies in the face of conventional wisdom. And so it was with an accidental discovery By microbiologists at an American university that wooden cutting boards kill food-poisoning bacteria that survive very nicely on the plastic boards that have been widely promoted for years as safer than wood. '

from this webpage: http://www.woodworkforums.com/f11/wood-kills-bacteria-775/

and another web page here:
http://www.rhtubs.com/wood-bacteria.htm