Antibacterials kill bacteria. Those such as alcohol, bleach and peroxide evaporate after killing the bacteria, but provide no lasting antibacterial action. Other antibacterials, such as the commonly used triclosan, leave a residue, which manufacturers say continues to kill bacteria. While that is the chemical's greatest selling point, it's also its greatest potential drawback, because that residue has the potential to create resistant bacteria or so-called super bugs, some researchers say. ...
Alcohol-based sanitizers are not believed to promote bacterial resistance because they don't leave a residue that allows bacteria time to evolve a resistant strain.
"(Resistance is) not going to occur with alcohol, peroxide or bleach. It's not there long enough (for the bacteria) to select a mutant," Levy says.
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