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Using an aseptic technique, bacteria are placed on a slide and heat fixed. The slide is then suspended over a water bath with some sort of porus paper over it, so that the slide is steamed . Malachite green is applied to the slide, which can penetrate the tough walls of the endospores, staining them green.
Using aseptic technique, prepare and air dried heat fixed slide with the desired organism. Prepare a boiling water bath. Cover the slide with a piece of paper towel and place on staining rack over the water bath. Flood the paper towel on the slide with Malachite Green ( primary stain). Steam the slide for 5 to 7 minutes (mordant).
Once stained, they do not decolourize. The addition of heat during the staining process is a huge contributing factor. [15] Heat helps open the spore's membrane so the dye can enter. The main purpose of this stain is to show germination of bacterial spores.
Applying a primary stain (crystal violet) to a heat-fixed smear of a bacterial culture. Heat fixation kills some bacteria but is mostly used to affix the bacteria to the slide so that they do not rinse out during the staining procedure. The addition of iodine, which binds to crystal violet and traps it in the cell
Carbol fuchsin is applied to a heat-fixed slide. The slide is then heated over a bunsen burner, or suspended over a hot water bath, covered with a paper towel, and steamed for 3 minutes. The slide is rinsed with acidified ethanol, and counter-stained with Methylene blue .
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Many of you have probably heard of a particular irresponsible behavior with dogs, known as backyard breeding, that typically occurs at home, often in inadequate conditions and without regard for a ...