Answer Choices:
A. bacteremia
B. septicemia*
Answer:
B
Question 17:
Molecular Koch’s postulates are used to identify which characteristic of pathogens?
A. an effective treatment
B. the ID50
C. the LD50
D. virulence factor genes*
Correct Answer: D
Question: Which toxin inhibits the release of glycine and GABA at the neuromuscular junction, thus preventing the relaxation of muscles?
Answer Choices:
A. anthrax
B. botulinum
C. diphtheria
D. tetanus*
Answer:
D
Question: The prodromal period is when the maximum number of pathogen particles or organisms are present in an infected host.
Answer:
False
Question: Which of the following is correct regarding the spleen?
Answer Choices:
A. It changes undifferentiated lymphocytes into competent lymphocytes.
B. It is a reservoir for RBCs to be removed without causing death.
C. It destroys aged leukocytes.
D. It produces several different hormones with unknown function.
E. It removes damaged red blood cells from the blood.
Answer:
E. It removes damaged red blood cells from the blood
Question: Select the most accurate description of how antibodies are produced.
Answer Choices:
A. B cells check if T cells stimulated by helper T cells
B. B cells then differentiate to form plasma cells
C. B cells then multiply and make identical cells
D. the helper T cells stimulate memory B cells
E. natural killer cells like the way helper T cells
Answer:
B. B cells then differentiate to form plasma cells
Question: Which virulence factor, produced by Staphylococcus aureus, allows the bacterium to be coated in fibrin that protects it from phagocytes?
Answer Choices:
A. catalase
B. coagulase*
C. collagenase
D. oxidase
Answer:
B
Question: ________ are exotoxins that can trigger a cytokine storm.
Answer:
Superantigens
Question: All etiologic agents are pathogens.
Answer:
False
Question: Listeria monocytogenes, the causative agent of listeriosis, can pass through the blood–placental barrier to infect a fetus. This type of transmission to the fetus is known as which of the following?
Answer Choices:
A. droplet
B. horizontal direct contact
C. indirect contact
D. vertical direct contact*
Answer:
D
Question: ________ are extracellular structures in bacteria that are involved in conjugation and can be used as adhesins.
Answer:
Pili
Question: Hyaluronidase is which type of exoenzyme?
Answer Choices:
A. glycohydrolase*
Answer:
A
Question: Nosocomial infections can be acquired in hospital settings.
Answer:
True
Question: The prevalence of HIV is generally higher than its incidence.
Answer:
True