teratoma. [terâ²ÉtÅâ²mÉ] pl. teratomas, teratomata. a tumor composed of different kinds of tissue, none of which normally occurs together or at the site of the tumor. Teratomas are most common in the ovaries or testes.
The pink-colored film or ring frequently seen on showers, tubs, toilets and pet water bowls is typically caused by growth of the airborne bacteria Serratia marcesens. This harmless nuisance organism reacts with standing water and frequently forms during spring and summer months.
Most conjunctivitis (pink eye) is caused by a variety of viruses and some bacteria. Some of these also can cause diarrhea. Most of your poop is not actually your digested food, but made up of a very important and useful bacterium called Escherichia coli which provides us with an essential vitamin, called vitamin K.