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Microbiology, 2021

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1036 24 • Review Questions<br />

21. Chronic _________ infections cause the unique<br />

sign of disease of greasy stool and are often<br />

resistant to treatment.<br />

Short Answer<br />

23. How does the diarrhea caused by dysentery<br />

differ from other types of diarrhea?<br />

24. Why do sugary foods promote dental caries?<br />

25. Which forms of viral hepatitis are transmitted<br />

through the fecal-oral route?<br />

Critical Thinking<br />

28. Why does use of antibiotics and/or proton pump<br />

inhibitors contribute to the development of C.<br />

difficile infections?<br />

29. Why did scientists initially think it was unlikely<br />

that a bacterium caused peptic ulcers?<br />

30. Does it makes a difference in treatment to know<br />

if a particular illness is caused by a bacterium<br />

(an infection) or a toxin (an intoxication)?<br />

22. Liver flukes are often found in the _________<br />

duct.<br />

26. What is an O&P exam?<br />

27. Why does the coughing up of worms play an<br />

important part in the life cycle of some<br />

helminths, such as the roundworm Ascaris<br />

lumbricoides?<br />

31. Based on what you know about HBV, what are<br />

some ways that its transmission could be<br />

reduced in a health-care setting?<br />

32. Cases of strongyloidiasis are often more severe<br />

in patients who are using corticosteroids to<br />

treat another disorder. Explain why this might<br />

occur.<br />

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