According to the American Cancer Society, skin cancer is the most common type of cancer in the United States. Skin cancer is an abnormal growth of skin cells. It generally develops in areas that are exposed to the sun, but it can form in places that donât normally receive sun exposure.
Harmful bacteria: 1  E. Coli can also be harmful if food or water is contaminated with it and then eaten. 2  Listeriosis can cause individuals to become very ill and can even be potentially deadly. 3  Examples of where it can be found are in shellfish, cold cuts, and unpasteurized milk.Answer #1). Helpful bacteria: 1  E. Coli are found in the intestines of humans and aid in digestion. 2  Streptomyces is used in making antibiotics. 3  Rhizobium are helpful bacteria found in the soil.
Healthy bacteria produce toxins that make it hard for bad bacteria like Clostridium to grow. Harmful bacteria and yeasts grow when there is not a strong population of good bacteria around. In fact, experimentally, animals with low amounts of good bacteria are very easy to infect with bad bacteria.f you could count all the bacteria in your gut, you would find that they outnumber the total number of cells in your body by a large number. The cells that make up your body (heart, liver, bone, and brain cells) add up to around 10 13 cells (10,000,000,000,000).