Question 1

Which of the following is NOT a function of the skin?

Accepted Answer

Synthesizes hemoglobin for oxygen transport

Question 2

Which layer of the skin contains most of the sensory receptors and blood vessels?

Accepted Answer

Dermis

Question 3

Why do most bacteria not survive long on the skin?

Accepted Answer

The skin has a high salt concentration, sebum, and a slightly acidic pH

Question 4

Which of the following is the most common cause of folliculitis?

Accepted Answer

Staphylococcus aureus

Question 5

A patient presents with a red, swollen, hot area on their lower leg. They have poorly controlled diabetes. Which diagnosis is most likely?

Accepted Answer

Cellulitis

Question 6

Which virulence factor is present in Staphylococcus aureus but NOT in Staphylococcus epidermidis?

Accepted Answer

Coagulase

Question 7

A child develops red patches on the face that become pus-filled vesicles and crust over. Which organism is most likely responsible?

Accepted Answer

Staphylococcus aureus

Question 8

Which of the following best describes the pathogenesis of necrotizing fasciitis?

Accepted Answer

S. pyogenes enters through breaks in the skin and secretes enzymes and toxins that destroy tissue

Question 9

Which of the following is a distinguishing symptom of Staphylococcal Scalded Skin Syndrome (SSSS)?

Accepted Answer

Sloughing of the outer epidermis in sheets

Question 10

A burn patient develops a blue-green discoloration at the wound site. Which pathogen is most likely responsible?

Accepted Answer

Pseudomonas aeruginosa

Question 11

Which of the following is the primary method of transmission for Rocky Mountain spotted fever?

Accepted Answer

Bite of an infected tick

Question 12

Which of the following is a characteristic lesion of cutaneous anthrax?

Accepted Answer

Painless black eschar

Question 13

Which of the following statements about smallpox is TRUE?

Accepted Answer

Smallpox is the first human disease to be eradicated

Question 14

A patient presents with painful, slow-spreading skin lesions that recur at the same site. Which virus is most likely responsible?

Accepted Answer

Human herpesvirus

Question 15

Which of the following best explains why acne is common during adolescence?

Accepted Answer

Increased sebum production provides nutrients for Cutibacterium acnes

Question 16

Which of the following is a recommended prevention strategy for leishmaniasis?

Accepted Answer

Reducing exposure to sand flies

Question 17

Which of the following is a unique symptom of scabies?

Accepted Answer

Intense itching and rash between the fingers

Question 18

Which of the following equations best represents the relationship between the rate of microbial growth ($$r) $$and environmental factors such as salt concentration ($$S$$), pH ($$pH$$), and temperature ($$T) on $$the skin?

Accepted Answer

$$r = k \cdot e$$^{-\alpha S}$$ \cdot e$$^{-\beta |pH-5.5|}$$ \cdot e$$^{-\gamma |T-33|}$$

Question 19

Which of the following best describes the role of the skin microbiome in preventing infection?

Accepted Answer

It produces chemicals that inhibit the growth of pathogens

Question 20

A patient with a history of animal exposure presents with a painless, black ulcer on their hand. Which organism is most likely responsible?

Accepted Answer

Bacillus anthracis

Chapter 19: Microbial Diseases of the Skin and Wounds

Study Guide - Practice Questions

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