Microbiology Ch.15 (OpenStax) Practice Exam
Questions Answered Correctly
Which of the following would be a sign of an infection? - Answer fever
Which of the following is an example of a noncommunicable infectious disease? - Answer Food
poisoning due to a preformed bacterial toxin in food
During an oral surgery, the surgeon nicked the patient's gum with a sharp instrument. This allowed
bacterium normally present in the mouth, to gain access to the blood. As a result, the patient developed
endocarditis (an infection of the hear). Which type of disease is this? - Answer iatrogenic
Which period is the stage of disease during which the patient begins to present general signs and
symptoms? - Answer Prodromal
A communicable disease that can be easily transmitted from person to person is which type of disease? -
Answer Contagious
Which of the following is a pathogen that could not be identified by the original Koch's postulates? -
Answer Human immunodeficiency virus
Pathogen A has an ID50 of 50 particles, pathogen B has an ID50 of 1,000 particles, and pathogen C has
an ID50 of 1 × 10^6 particles. Which pathogen is most virulent? - Answer Pathogen A
Which of the following choices lists the steps of pathogenesis in the correct order? - Answer Exposure,
adhesion, invasion, infection
Which of the following would be a virulence factor of a pathogen? - Answer A surface protein allowing
the pathogen to bind to host cells
You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is composed of
mostly protein, has high toxicity, and is not heat stable. You also discover that it targets liver cells. Based
on these characteristics, how would you classify this toxin? - Answer exotoxin
Questions Answered Correctly
Which of the following would be a sign of an infection? - Answer fever
Which of the following is an example of a noncommunicable infectious disease? - Answer Food
poisoning due to a preformed bacterial toxin in food
During an oral surgery, the surgeon nicked the patient's gum with a sharp instrument. This allowed
bacterium normally present in the mouth, to gain access to the blood. As a result, the patient developed
endocarditis (an infection of the hear). Which type of disease is this? - Answer iatrogenic
Which period is the stage of disease during which the patient begins to present general signs and
symptoms? - Answer Prodromal
A communicable disease that can be easily transmitted from person to person is which type of disease? -
Answer Contagious
Which of the following is a pathogen that could not be identified by the original Koch's postulates? -
Answer Human immunodeficiency virus
Pathogen A has an ID50 of 50 particles, pathogen B has an ID50 of 1,000 particles, and pathogen C has
an ID50 of 1 × 10^6 particles. Which pathogen is most virulent? - Answer Pathogen A
Which of the following choices lists the steps of pathogenesis in the correct order? - Answer Exposure,
adhesion, invasion, infection
Which of the following would be a virulence factor of a pathogen? - Answer A surface protein allowing
the pathogen to bind to host cells
You have recently identified a new toxin. It is produced by a gram-negative bacterium. It is composed of
mostly protein, has high toxicity, and is not heat stable. You also discover that it targets liver cells. Based
on these characteristics, how would you classify this toxin? - Answer exotoxin
