| One is a microscopic rod-shaped bacterium called bacillus anthracis, easy to grow in the lab but fragile and easily killed in the open. |
| The cholera bacterium may also live in the environment in brackish rivers and coastal waters. |
| This bacterium is primarily carried by birds such as parakeets, parrots, pigeons, turkeys, and ducks. |
| In Peru, ballast water has been blamed for the introduction of a bacterium that causes cholera. |
| When exposed to an antigen, that is a virus or a bacterium, the body produces antibodies. |
| In New York five people are confirmed to have been exposed to the bacterium, of whom two have developed anthrax. |
