Vacuum cleaners are meant clean our homes, but in addition to picking up dirt, dust and mites, most vacuum cleaners also spread harmful bacteria.

As revealed in this this 4-minute video from NBC's Today Show, E. Coli, salmonella and other virus-causing entities are commonly found on vacuum cleaner under-bristles and, in some cases, bacteria can be 100 times more concentrated than on a public toilet seat.

The video goes on to give some general rules to limit indoor germ exposure -- some more practical than others. The rules include:

• Avoid wearing shoes indoors
  
• Wash your hands after playing on the carpets and rugs
  
• Don't stop vacuuming

And, of course, having the right hardware can help, too.

If it's time to replace that old vacuum, start your search online with a discount store like GoVacuum.com. Most online sites will have a wider selection than your local hardware store and shipping is usually free.