Question 1

Which of the following is NOT a primary function of the skin in maintaining health?

Accepted Answer

Synthesizing vitamin C

Question 2

Staphylococcus aureus is a common cause of skin infections. Which characteristic makes it particularly difficult to eliminate from hospital environments?

Accepted Answer

It is tolerant of salt and desiccation

Question 3

A patient presents with a non-itchy spotted rash on their trunk and appendages after a hiking trip in the southeastern United States. Which pathogen is most likely responsible?

Accepted Answer

Rickettsia rickettsii

Question 4

Which of the following best explains why chickenpox can lead to shingles later in life?

Accepted Answer

The virus remains latent in nerve ganglia and can reactivate

Question 5

Which of the following statements about measles (Rubeola) is CORRECT?

Accepted Answer

It was mostly eradicated in the US by widespread vaccination

Question 6

A child develops warts on their hands after using shared gym equipment. Which of the following is the most likely mode of transmission?

Accepted Answer

Direct contact and fomites

Question 7

Leishmaniasis is diagnosed by which of the following methods?

Accepted Answer

Microscopic identification of the protozoa

Question 8

Which of the following is a distinguishing feature of the central nervous system (CNS)?

Accepted Answer

It is an axenic environment, free of other organisms

Question 9

Botulism is most dangerous because the toxin produced by Clostridium botulinum:

Accepted Answer

Blocks neurotransmitter release at neuromuscular junctions

Question 10

A patient presents with muscle spasms and lockjaw after stepping on a rusty nail. Which treatment is most appropriate?

Accepted Answer

Passive immunotherapy and active immunization

Question 11

Which of the following best describes the pathogenesis of African sleeping sickness?

Accepted Answer

The protozoan randomly changes its cell surface proteins to evade the immune system

Question 12

Which of the following is a zoonotic disease, as defined by transmission from animals to humans?

Accepted Answer

Leprosy from armadillos

Question 13

Which of the following is the most common cause of viral meningitis?

Accepted Answer

Enterovirus

Question 14

Which of the following best explains why infants are more susceptible to botulism?

Accepted Answer

Infants lack a mature microbiota to compete with Clostridium botulinum

Question 15

Which of the following is a key diagnostic feature of rabies infection in humans?

Accepted Answer

Detection of Negri bodies in the brain

Question 16

Which of the following best describes the prevention strategy for arboviral encephalitis in humans?

Accepted Answer

Limiting contact with mosquitoes using netting and repellents

Question 17

Which of the following statements about fungal infections of the nervous system is CORRECT?

Accepted Answer

They can be diagnosed by detection of fungal antigen in CSF

Question 18

A patient with leprosy is found to have acid-fast bacilli in their skin lesions. Which organism is responsible?

Accepted Answer

Mycobacterium leprae

Question 19

Which of the following is the best explanation for why the CNS is usually free of microorganisms?

Accepted Answer

It is protected by the blood-brain barrier and lacks normal microbiota

Question 20

Which of the following equations best represents the relationship between the number of cases ($$C$$), the rate of transmission ($$R$$), and the susceptible population ($$S) $$for a directly transmitted viral disease?

Accepted Answer

$$C = R 	imes S$$

Microbial Diseases of the Skin and Nervous System: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards