Question 1

Which of the following best describes a reservoir of infection?

Accepted Answer

A source, living or inanimate, that provides a pathogen with adequate conditions for survival, multiplication, and transmission.

Question 2

Typhoid Mary is an example of which type of carrier?

Accepted Answer

Asymptomatic carrier

Question 3

Which of the following is an example of a zoonosis?

Accepted Answer

Rabies transmitted from dogs to humans

Question 4

Which nonliving reservoir is correctly matched with its pathogen?

Accepted Answer

Soil – Clostridium botulinum

Question 5

Which of the following is NOT a step in bacterial pathogenesis?

Accepted Answer

Production of antibiotics

Question 6

What is the most common mode of transmission for sexually transmitted infections (STIs) such as syphilis and gonorrhea?

Accepted Answer

Direct contact transmission

Question 7

Which of the following objects can act as a fomite in indirect contact transmission?

Accepted Answer

Towels

Question 8

Droplet transmission typically spreads microbes over what approximate distance?

Accepted Answer

$$\u003c 1 \mathrm{\ m}$$

Question 9

Which of the following diseases is most likely to be transmitted by vehicle transmission?

Accepted Answer

Cholera from contaminated water

Question 10

A patient contracts tetanus after stepping on a rusty nail. What type of reservoir and transmission is involved?

Accepted Answer

Nonliving reservoir (soil), indirect contact transmission

Question 11

Which of the following is a critical reason why asymptomatic carriers are difficult to identify?

Accepted Answer

They do not show obvious signs of infection.

Question 12

Which of the following is NOT a vehicle for transmission of disease?

Accepted Answer

Mosquito

Question 13

Which equation best represents the relationship between the number of infected individuals ($$I$$), the transmission rate ($$\beta$$), and the number of susceptible individuals ($$S) in a $$simple epidemic model?

Accepted Answer

$$\frac{dI}{dt} = \beta S I$$

Question 14

Which of the following statements about zoonotic diseases is correct?

Accepted Answer

They are diseases transmitted from animals to humans.

Question 15

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

Accepted Answer

Touching an infected person

Question 16

Which of the following is a plausible consequence of a pathogen producing toxins during infection?

Accepted Answer

Tissue damage and disease

Question 17

Which of the following best explains why pathogens causing STIs do not survive long outside the body?

Accepted Answer

They are very sensitive to environmental stress like drying.

Question 18

Which of the following is NOT a plausible route for vehicle transmission?

Accepted Answer

Touching contaminated door handles

Question 19

Which of the following is a correct example of indirect contact transmission?

Accepted Answer

Contracting influenza from a contaminated tissue

Question 20

Which of the following is a common disease transmitted by droplet transmission?

Accepted Answer

Influenza

Reservoirs and Transmission of Infectious Diseases

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