old blog post. The disk on the left shows bacteria colonies that grew from my hand before it was washed with a disinfectant. The disk on the right shows the number of colonies that grew from my hand after it was cleaned with the waterless, alcohol-based antiseptic that is in dispensers outside every patient room in my former hospital.
BMJ Qual Saf. 2012 Jun;21(6):499-502. Epub 2012 Feb 22.