A patient was suffering from tuberculosis disease, a sputum specimen was stained using acid-fast stain, the color and the morphology of bacterial cells seen under the microscopes is expected to be: a. None of the choices b. Blue-colored bacilli c. Violet-colored streptobacilli d. Blue-colored cocci Clear my choice
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Step 1: Acid-fast stain is used to detect mycobacteria, including the bacteria that cause tuberculosis. Show more…
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Staining bacteria before observing them under the microscope is helpful because: a.) it enables detection of microbes indicating the patient has an infection b.) it increases contrast to allow for better visualization c.) it allows you to observe the shape and arrangement of the organism d.) all of the above 2. Rod-shaped bacteria that are connected in pairs are known as: a.) streptobacilli b.) diplococci 3. When preparing a smear from a bacterial colony (as opposed to a broth culture): a.) add the stain before preparing the bacterial smear b.) water is not required as the solid media has enough water c.) add a drop of water to the glass slide prior to transferring the bacterial sample d.) none of these are correct
While Gram-staining the Gram-positive bacterium Staphylococcus epidermidis, you forgot to counterstain with safranin. What color will the bacteria be when viewed under the microscope? a. Clear b. Cannot be determined c. Green d. Purple e. Red
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