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.
Trichomonas vaginalis. Trichomoniasis-no cysts, causes vaginitis (vaginal itching, greenish-yellow discharge); usually nonsymptomatic in males but may cause nongonococcal urethritis. Giardia lamblia. Giardiasis-forms cysts, adheres to intestinal wall, may inhibit nutritional absorption.