[danielford]

Yes that's wrong, but the paper that corrected this misconception wasn't published until January of 2016. I think you should give them at least a year to update before unleashing the disapproving scowl.

[mrob]

The new paper estimating roughly equal numbers of bacteria and human cells:

http://biorxiv.org/content/early/2016/01/06/036103

[ekianjo]

My point is that it was never proved in the first place. You should never reprint rumors as hard facts especially if your business is education.