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Thousands of bottles of a medicinal mouthwash have been recalled from 11 countries, including New Zealand, after harmful bacteria were detected.Colgate-Palmolive UK says it is recalling its medicinal mouthwash Periogard, which is sold under different brand names in other countries.It is being taken off the shelves of pharmacies, shops, dental surgeries and hospitals in 11 countries across Europe and Australasia.Britain's Medicines and Healthcare Products Regulatory Agency (MHRA) said the recall comes after tests found the bacteria Burkholderia in some samples of the product.
The bugs weren't growing but were present in clinically significant numbers (associated with septicemia) - presumed to be present in biofilm material.
Bacteria are more frequently encounter in nature as communities of cells living in a matrix - think gel - gel of polysaccharide, and other mineral and biological materials. The matrix with cells is the "biofilm". Here's a link to a good description - http://www.cs.montana.edu/ross/personal/intro-biofilms-s4.htm and a recent article describing the resistance of bacteria in biofilm to disinfecants.Biofouling 2011 Oct;27(9):1017-32. Resistance of bacterial biofilms to disinfectants: a review.
What inorganic chemicals(if any) can bacteria metabolize?