O triclosan é um anti-bacteriano muito usado desde os anos 70. Pelos vistos mata as bactérias más e também as boas:
http://www.walesonline.co.uk/news/health/using-toothpaste-brush-your-teeth-11353553
Citando:
"Some bacteria were more susceptible to the impact of triclosan - such as the family Enterobacteriaceae - and others were more resilient like the genus Pseudomonas."
