Answers to End-of-Chapter Questions
CHAPTER 23 Microbial Diseases of the Digestive System
Multiple Choice
Modified True/False
4. True 8. True
Fill in the Blanks
1. enamel, dentin, pulp
Matching
Short Answer
1. The normal microbiota outcompete pathogens in what is called microbial antagonism.
Microbiology with Diseases by Body System, 5e
9. Virulent strains of Entamoeba histolytica produce adhesion proteins, proteases, proteins
Visualize It!
1. a. plaque (biofilm) formation c. acid destroys enamal
Critical Thinking
1. Stomach acid is a barrier against pathogens passing through the stomach to infect the
Answers to End-of-Chapter Questions
7. Hepatitis D virus is strictly dependent on hepatitis B virus for production of virions: in
8. Infection of accessory organs of the digestive system may result in impaired health due to
reduced efficiency of food processing, which in turn results in poor recovery of the nutri-
tate the exposed stomach lining, increasing inflammation.
10. A large fraction of the population contracting gastroenteritis within a short period of time
suggests that the water supply may be contaminated, so city water service should be
12. Herpes lesions are the result of reactivation of latent herpes in a neuron, and develop ini-
tially at the terminus of the infected neuron. Typically, the neurons infected in the upper
Microbiology with Diseases by Body System, 5e
Concept Mapping
1. Acute