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.
Gram positive bacteria stain purple. GRAM NEGATIVE BACTERIA: 1. A very thin layer of peptidoglycan 2. Teichoic acid are absent 3. Lipopolysaccharide is present (outside the polysacchride) 4. Weakly sensitive to penicillin 5. Weakly Digested by lysozyme 6. protein content 9% 7. lipid and lipoprotein content 58% 8. Gram negative bacteria stain pink.