Question 1

Which of the following best describes the relationship between humans and their resident microbiota?

Accepted Answer

Resident microbiota are part of the normal microbiota throughout one’s life and are mostly commensal.

Question 2

A patient develops a yeast infection after receiving broad-spectrum antibiotics in a hospital. This is an example of which type of infection?

Accepted Answer

Superinfection

Question 3

Which of the following is NOT a true portal of entry for pathogens?

Accepted Answer

Parenteral route

Question 4

A disease that is constantly present in a population or geographic area is best described as:

Accepted Answer

Endemic

Question 5

Which of the following is a function of bacterial siderophores?

Accepted Answer

They bind to iron in the environment, making it available for bacterial growth.

Question 6

Which of the following best describes the difference between incidence and prevalence?

Accepted Answer

Incidence is the number of new cases in a given period, while prevalence is the total number of cases at a given time.

Question 7

A patient is infected with a pathogen but does not show any symptoms. However, laboratory tests reveal the presence of the pathogen. This infection is best described as:

Accepted Answer

Asymptomatic

Question 8

Which of the following is an example of indirect contact transmission?

Accepted Answer

Touching a contaminated doorknob

Question 9

Which of the following is a virulence factor that allows bacteria to avoid phagocytosis?

Accepted Answer

Bacterial capsule

Question 10

A hospital patient develops pneumonia from bacteria that were present in the hospital environment. This is an example of:

Accepted Answer

Exogenous infection

Question 11

Which of the following best describes the prodromal period of an infectious disease?

Accepted Answer

The period with vague, general symptoms

Question 12

Which of the following is an example of a biological vector in disease transmission?

Accepted Answer

A mosquito transmitting malaria

Question 13

Which of the following is NOT a function of extracellular enzymes produced by pathogens?

Accepted Answer

Directly binding to host cell receptors

Question 14

A disease that spreads from animals to humans is called:

Accepted Answer

Zoonosis

Question 15

Which of the following is the most effective way to reduce healthcare-associated infections (HAIs)?

Accepted Answer

Handwashing by healthcare workers

Question 16

Which of the following best describes Koch’s postulates?

Accepted Answer

A set of criteria used to prove that a particular pathogen causes a particular disease

Question 17

Which of the following is an example of vehicle transmission?

Accepted Answer

Eating undercooked pork containing Trichinella

Question 18

Which of the following is a correct equation for calculating disease incidence?

Accepted Answer

$$	ext{Incidence} = \frac{	ext{Number of new cases during a period}}{	ext{Population at risk during the same period}}$$

Question 19

Which of the following is a real-life example of a pandemic?

Accepted Answer

The global spread of COVID-19

Question 20

Which of the following best describes the role of public health agencies in epidemiology?

Accepted Answer

They enforce standards of water and food safety, reduce disease vectors, and educate the public.

Infection, Diseases, and Epidemiology: Microbiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards