1.   Bacteria can enter through a cut or graze on the skin.

2.   The bacteria can enter the bloodstream, but are usually quickly destroyed when antibodies and the immune system function properly.

3.   Anthrax, caused by bacteria found in infected animals, most commonly occurs when the bacterium enters a cut in the skin.

4.   Bacterial endocarditis, an inflammation of the interior lining of the heart, can be caused when bacteria enter the bloodstream through a rupture.

5.   Bacteria can enter the blood stream and flow to the heart to cause endocarditis from professional teeth cleaning, tooth extractions, and other medical and dental procedures.

6.   But over the past decade, microbiologists have discovered that many bacteria can enter a dormant state and cannot be coaxed to multiply on standard nutrients.

7.   Fasciitis also can set in if the bacteria enters the body through a cut, bruise and even a chicken pox lesion.

8.   Exposure to tetanus typically occurs through a puncture wound that allows bacteria to enter the body.

9.   From there, the bacteria enter the food supply.

10.   If, despite vaccination, a bacterium does enter your body, it substitutes another protein on its surface, against which the vaccine would not work.