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Microbiology, 2021

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24 • Review Questions 1035<br />

6. Which of the following is true of HSV-1?<br />

a. It causes oral thrush in<br />

immunocompromised patients.<br />

b. Infection is generally self-limiting.<br />

c. It is a bacterium.<br />

d. It is usually treated with amoxicillin.<br />

7. Which type of E. coli infection can be severe with<br />

life-threatening consequences such as hemolytic<br />

uremic syndrome?<br />

a. ETEC<br />

b. EPEC<br />

c. EHEC<br />

d. EIEC<br />

13. Which protozoan has a unique appearance, with<br />

a blue halo, when viewed using ultraviolet<br />

fluorescence microscopy?<br />

a. Giardia lamblia<br />

b. Cryptosporidium hominis<br />

c. Cyclospora cayetanesis<br />

d. Entamoeba histolytica<br />

14. The micrograph shows protozoans attached to<br />

the intestinal wall of a gerbil. Based on what you<br />

know about protozoan intestinal parasites, what<br />

is it?<br />

8. Which species of Shigella has a type that<br />

produces Shiga toxin?<br />

a. S. boydii<br />

b. S. flexneri<br />

c. S. dysenteriae<br />

d. S. sonnei<br />

9. Which type of bacterium produces an A-B toxin?<br />

a. Salmonella<br />

b. Vibrio cholera<br />

c. ETEC<br />

d. Shigella dysenteriae<br />

10. Which form of hepatitisvirus can only infect an<br />

individual who is already infected with another<br />

hepatitisvirus?<br />

a. HDV<br />

b. HAV<br />

c. HBV<br />

d. HEV<br />

11. Which cause of viral gastroenteritis commonly<br />

causes projectile vomiting?<br />

a. hepatitisvirus<br />

b. Astroviruses<br />

c. Rotavirus<br />

d. Noroviruses<br />

12. Which protozoan is associated with the ability<br />

to cause severe dysentery?<br />

a. Giardia lamblia<br />

b. Cryptosporidium hominis<br />

c. Cyclospora cayetanesis<br />

d. Entamoeba histolytica<br />

Figure 24.41<br />

(credit: Dr. Stan Erlandsen, Centers for<br />

Disease Control and Prevention)<br />

a. Giardia lamblia<br />

b. Cryptosporidium hominis<br />

c. Cyclospora cayetanesis<br />

d. Entamoeba histolytica<br />

15. What is another name for Trichuris trichiura?<br />

a. pinworm<br />

b. whipworm<br />

c. hookworm<br />

d. ascariasis<br />

16. Which type of helminth infection can be<br />

diagnosed using tape?<br />

a. pinworm<br />

b. whipworm<br />

c. hookworm<br />

d. tapeworm<br />

Fill in the Blank<br />

17. The part of the gastrointestinal tract with the<br />

largest natural microbiota is the _________.<br />

18. When plaque becomes heavy and hardened, it<br />

is called dental calculus or _________.<br />

19. Antibiotic associated pseudomembranous<br />

colitis is caused by _________.<br />

20. Jaundice results from a buildup of _________.

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