Being in the medical field, I can let you guys in on a secret...alcohol is a low-level disinfectant and even household bleach is only an intermediate-level disinfectant. You want something hospital grade like glutaraldehyde http://www.henryschein.com/us-en/Sea...glutaraldehyde
If you're using bleach to disinfect your blades, remember that disinfection does not eliminate microorganisms...it merely reduces the number. Even then, you would have to let your blade sit in the bleach for nearly a full day in order to do a complete cold sterile on it. items like the glutaraldehyde will do a cold sterile in about ten hours and doesn't have the bad reactions that bleach will have on a blade left overnight soaking. Remember that 'hospital grade' means that it has tuburculocidal action and needs to eliminate tuburculosis.
Prior to disinfection or sterilization, consider a run through the ultrasonic cleaner. Sterilants and disinfectants will only sterilize the metal they can reach. In the event that some bioburder (microscopic chunks of flesh, etc) remain on the blade, the sterilant will be innefective in that area and only sterilizes, it does not REMOVE the bioburden.
The glutaraldehyde is great stuff to use just about anywhere in the house, but your house will end up smelling like a dentist's office when you're done.
Here's a quick primer on the disinfection/sterilization http://vetmed.duhs.duke.edu/guidelin...sinfection.htm
If you're not interested in this whole procedure, try spraying your blade with Lysol...ever read the back and see everything it kills on contact...awesome stuff.