Question 1

Which of the following best describes the term 'etiology' in the context of infectious diseases?

Accepted Answer

The cause of a disease.

Question 2

A newborn delivered via vaginal birth is most likely to be colonized by which type of bacteria in the intestine?

Accepted Answer

Lactobacilli

Question 3

Which of the following is NOT a step in Koch's postulates?

Accepted Answer

The pathogen must be shown to be resistant to antibiotics.

Question 4

Which of the following is an example of a non-communicable disease?

Accepted Answer

Tetanus

Question 5

A patient reports feeling tired and achy, but these changes are not apparent to the physician. These are best described as:

Accepted Answer

Symptoms

Question 6

Which of the following factors does NOT influence the composition of normal microbiota?

Accepted Answer

Blood type

Question 7

Which of the following statements about the human microbiome is correct?

Accepted Answer

It begins to establish in utero and changes throughout life.

Question 8

Which of the following is a plausible reason why isolating bacteria in pure culture is beneficial in medicine?

Accepted Answer

It allows for the identification of the specific pathogen causing disease.

Question 9

Which of the following is an exception to Koch's postulates?

Accepted Answer

Some pathogens can cause several disease conditions.

Question 10

Which of the following best describes a contagious disease?

Accepted Answer

A disease that is easily and rapidly spread from one host to another.

Question 11

Which symbiotic relationship is illustrated by Escherichia coli aiding in digestion and producing vitamin K for the host?

Accepted Answer

Mutualism

Question 12

If a virus must use the host to survive and negatively affects the host, this is an example of:

Accepted Answer

Parasitism

Question 13

Which of the following is the estimated number of bacterial cells in the human microbiome?

Accepted Answer

$$4 	imes 10$$^{13}$$

Question 14

A syndrome is best defined as:

Accepted Answer

A specific group of signs and symptoms that accompany a disease.

Question 15

Which of the following is true about normal microbiota?

Accepted Answer

They permanently colonize the host and do not cause disease under normal conditions.

Question 16

Which of the following is a transient microbiota characteristic?

Accepted Answer

They may be present for days, weeks, or months.

Question 17

Which of the following is a mechanical factor influencing the normal microbiota?

Accepted Answer

Saliva flow washing microbes from the mouth.

Question 18

Which of the following best explains why several different pathogens may cause the same signs and symptoms?

Accepted Answer

Different pathogens can affect the same tissues or organs, leading to similar clinical presentations.

Question 19

Which project analyzes relationships between microbial communities on the body and human health?

Accepted Answer

Human Microbiome Project

Question 20

A physician observes a fever in a patient. This is best classified as:

Accepted Answer

A sign

Introduction to Infectious Bacterial Disease and Pathology: Human Microbiome & Etiology

Study Guide - Practice Questions