Microbiology: An Introduction
Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 21, Problem 6MCQ

You microscopically examine scrapings from a case of Acan-thamoeba keratitis. You expect to see

  1. a. nothing.
  2. b. viruses.
  3. c. gram-positive cocci.
  4. d. eukaryotic cells.
  5. e. gram-negative cocci.
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Which of the following is/are a pyogenic coccus/cocci?a. Streptococcus b. Staphylococcus c. Neisseria d. all of these
Why are Pseudomonas aeruginosa infections difficult to treat? A. Because they form biofilms, which are difficult for antibiotics to penetrate. B. Because they have a special endotoxin that degrades many antibiotics. C. Because we do not have any antibiotics that target P. aeruginosa.  D. Because they are gram-positive bacteria, which are harder to treat.
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