An organism that appears reddish-pink after Gram staining is usually called:
a. gram-negative. c. non–acid-fast.
b. gram-positive. d. acid-fast.
ANS: A
Gram-positive organisms stain blue or violet, whereas gram-negative organisms appear red from a counterstain of red dye safranin. Acid-fast is a different test.
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Fill in the blank(s) with the appropriate word(s).
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