Question 1

Which of the following best describes the relationship between bacteria in the human colon and their host?

Accepted Answer

Mutualism

Question 2

What is the primary factor that distinguishes resident microbiota from transient microbiota?

Accepted Answer

Transient microbiota are associated with the body for a limited time

Question 3

Which of the following conditions can cause normal microbiota to become opportunistic pathogens?

Accepted Answer

All of the above

Question 4

Infants acquire their resident microbiota in all of the following ways EXCEPT:

Accepted Answer

In the womb

Question 5

Which symbiotic relationship is characterized by one organism benefiting while the other is harmed?

Accepted Answer

Parasitism

Question 6

A fungus secreting an antibiotic that inhibits nearby bacteria is an example of which type of symbiotic relationship?

Accepted Answer

Amensalism

Question 7

Which of the following is NOT a factor influencing the composition of the human microbiome?

Accepted Answer

Blood type

Question 8

The highest density of microbes in the human body is found in which location?

Accepted Answer

Gut

Question 9

Which of the following equations best represents the probability $$P of $$infection transmission given contact rate $$C$$, pathogen virulence $$V$$, and host susceptibility $$S$$?

Accepted Answer

$$P = C 	imes V 	imes S$$

Question 10

Which of the following statements about mutualism is TRUE?

Accepted Answer

Both organisms benefit

Question 11

A patient is prescribed broad-spectrum antibiotics. Which scenario is most likely to occur regarding their microbiota?

Accepted Answer

Opportunistic pathogens may cause disease due to disruption of normal microbiota

Question 12

Which of the following genera are commonly found in the lower digestive tract according to Table 14.2?

Accepted Answer

Bacteroides

Question 13

If $$N is $$the number of microbes in the gut and $$D is $$the density per unit area, which equation best describes the total number of microbes in the gut given area $$A$$?

Accepted Answer

$$N = D 	imes A$$

Question 14

Which of the following is an example of commensalism?

Accepted Answer

Mites in human hair follicles

Question 15

Which of the following is NOT a way that normal microbiota can become opportunistic pathogens?

Accepted Answer

Stable physiological state

Question 16

Which of the following best describes the acquisition of microbiota in humans?

Accepted Answer

Microbiota are acquired at birth and during early life

Question 17

Which of the following is a plausible consequence of introducing normal microbiota into an unusual site in the body?

Accepted Answer

Development of infectious disease

Question 18

Which of the following is TRUE regarding the microbiome of the upper respiratory tract?

Accepted Answer

It contains genera such as Staphylococcus and Neisseria

Question 19

Which of the following best describes amensalism?

Accepted Answer

One organism is harmed, the other is unaffected

Question 20

Which of the following is a real-world example of parasitism?

Accepted Answer

Tuberculosis bacteria in human lung

Infection, Infectious Disease, and Epidemiology: The Human Microbiome and Symbiotic Relationships

Study Guide - Practice Questions

Study Guide - Flashcards