Question 1

Which of the following best describes the relationship between termites and the protozoa in their gut, as shown in the first image?

Accepted Answer

Mutualism

Question 2

According to Table 14.1, which type of symbiotic relationship is exemplified by bacteria in the human colon?

Accepted Answer

Mutualism

Question 3

Which of the following genera is commonly found as resident microbiota on the skin, according to Table 14.2?

Accepted Answer

Staphylococcus

Question 4

What is the primary reason transient microbiota cannot persist in the body?

Accepted Answer

They are eliminated by the body's defense cells

Question 5

Which portal of entry is most commonly used by respiratory pathogens, as illustrated in the images?

Accepted Answer

Mucous membranes

Question 6

Which pathogen listed in Table 14.4 can cross the placenta and cause syphilis in the fetus?

Accepted Answer

Treponema pallidum

Question 7

What is the function of bacterial adhesion factors, as shown in the microbe-host cell diagram?

Accepted Answer

They enable bacteria to attach to host cells

Question 8

Which of the following is a subjective manifestation of disease, according to Table 14.5?

Accepted Answer

Pain

Question 9

According to Table 14.8, which statement correctly distinguishes exotoxins from endotoxins?

Accepted Answer

Exotoxins are produced by Gram-positive and Gram-negative bacteria, while endotoxins are only produced by Gram-negative bacteria

Question 10

Which of the following is an example of a zoonosis transmitted by a biological vector, according to Table 14.3?

Accepted Answer

Malaria from monkeys via Anopheles mosquito

Question 11

Which extracellular enzyme allows bacteria to invade deeper tissues by breaking down collagen, as shown in the hyaluronidase and collagenase diagram?

Accepted Answer

Collagenase

Question 12

What is the effect of bacterial capsules as antiphagocytic factors?

Accepted Answer

They make bacteria slippery and difficult for phagocytes to engulf

Question 13

Which stage of infectious disease is characterized by the most severe signs and symptoms?

Accepted Answer

Illness

Question 14

Which mode of transmission involves pathogens traveling more than 1 meter via aerosols, as described in the study materials?

Accepted Answer

Airborne transmission

Question 15

Which term describes the number of new cases of a disease in a given area during a given period of time?

Accepted Answer

Incidence

Question 16

A patient develops an infection after a surgical procedure. According to Table 14.7, which category does this infection belong to?

Accepted Answer

Iatrogenic

Question 17

Which of the following is a limitation of Koch’s postulates?

Accepted Answer

Ethical considerations prevent applying them to pathogens requiring a human host

Question 18

Which of the following is a real-world example of a disease caused by an exotoxin, according to Table 14.8?

Accepted Answer

Tetanus

Question 19

Which term describes a disease that is acquired in a health care setting?

Accepted Answer

Healthcare-associated (nosocomial)

Question 20

Which of the following is the most effective way to reduce healthcare-associated infections, according to the study materials?

Accepted Answer

Handwashing

Ch 14 Infection, Infectious Diseases, and Epidemiology: Core Concepts and Mechanisms

Study Guide - Practice Questions