- Staph Aureus is the bacteria that causes food poisoning.
- Streptococcus is a bacteria that can cause small infections such as strep throat. However it can also causes serious diseases like pneumonia. Certain types of Streptococcus can be fatal.
- Campylobacter is a group of bacteria that can create illnesses that effect humans and is a common cause of food poisoning.
-Yersinia Pestis or Bubonic Plague is a rod-shaped bacteria that is well known for it's harmful nature. It is carried by fleas found on animals such as rats and mice. This bacteria is believed to have caused the death of millions of people throughout human history. This bacteria caused the Plague of the 1600s.
This information was found at http://www.buzzle.com/articles/helpful-and-harmful-types-of-bacteria.html