Dermatophyte Test Medium (DTM) is a specialized agar used in medical mycology. It is based on Sabouraud's dextrose agar with added cycloheximide to inhibit saprotrophic growth, antibiotic to inhibit bacterial growth, and phenol red a pH indicator. The pH indicator is useful in distinguishing a dermatophyte fungus, which utilizes nitrogenous material for preferred metabolism, producing alkaline by-products, imparting a red color change to the medium. Typical saprotrophic fungi utilized carbohydrates in the medium producing acidic by-products and no red color change.
|
||||||||||||||||||||||||||||||||||||||||||
Famous quotes containing the words test and/or medium:
“I have come to believe ... that the stage may do more than teach, that much of our current moral instruction will not endure the test of being cast into a lifelike mold, and when presented in dramatic form will reveal itself as platitudinous and effete. That which may have sounded like righteous teaching when it was remote and wordy will be challenged afresh when it is obliged to simulate life itself.”
—Jane Addams (1860–1935)
“I devoutly believe it is the writer who has matured the film medium more than anyone else in Hollywood. Even when he knew nothing about his work, he brought at least knowledge of life and a more grown-up mind, a maturer feeling about the human being.”
—Dudley Nichols (1895–1960)