Interestingly all honey contains some antibacterial benefits, this is due to its high sugar content, acidity and hydrogen peroxide content which is formed by glucose oxidisation. The problem is that with most types of honey this antibacterial content can be compromised or completely eliminated when it is exposed to heat or comes into contact with water, saliva, blood or other bodily tissue.
Where is with Manuka Honey, in addition to the regular honey antibacterial benefits, it also contains the non-peroxide activity, which is not affected or compromised when it is exposed to heat or comes into contact with water, saliva or other bodily products. For this reason, Manuka Honey is preferred over regular honey when utilised for antibacterial benefit, because it is stable and the quality is not compromised when used or consumed.
This information is based on research conducted by Dr Peter Molan - http://waikato.academia.edu/PeterMolan
The antibacterial activity of honey and its role in treating diseases
Whats special about Active Manuka
How the antibacterial activity of manuka honey is rated