Question 1

Which of the following best describes the difference between protozoal and metazoal parasitic infections?

Accepted Answer

Protozoal infections are caused by unicellular organisms, while metazoal infections are caused by multicellular organisms.

Question 2

Which of the following is a characteristic of mycoplasmas that distinguishes them from other bacteria?

Accepted Answer

Mycoplasmas lack a cell wall, making them resistant to antibiotics targeting cell wall synthesis.

Question 3

A patient presents with a superficial fungal infection. Which layer of the skin is most likely affected?

Accepted Answer

Epidermis

Question 4

Which of the following viruses is most likely to cause glandular enlargement in humans?

Accepted Answer

Epstein-Barr virus

Question 5

Which equation best represents the exponential growth of a virus population in a host, assuming no immune response?

Accepted Answer

$$N(t) = N_0$ e$$^{r t}$$

Question 6

Which of the following is a method to prevent the spread of prion diseases?

Accepted Answer

Avoiding consumption of contaminated animal products

Question 7

A patient is diagnosed with a roundworm infection. Which type of organism is responsible?

Accepted Answer

Metazoal parasite

Question 8

Which of the following is NOT a property of infectious fungi?

Accepted Answer

They are capable of photosynthesis.

Question 9

Which of the following best describes the structure of a virus?

Accepted Answer

A protein coat surrounding genetic material, lacking cellular organelles.

Question 10

Which of the following is a common misconception about HIV/AIDS?

Accepted Answer

AIDS can be cured with antibiotics.

Question 11

Which of the following is most likely to cause diarrhea in humans?

Accepted Answer

Enteric viruses

Question 12

A patient presents with symptoms of hepatitis. Which of the following pathogens is most likely responsible?

Accepted Answer

Hepatitis virus

Question 13

Which of the following is a property of prions that makes them unique among infectious agents?

Accepted Answer

They are infectious proteins lacking nucleic acids.

Question 14

Which of the following is a plausible scenario for a systemic mycotic infection?

Accepted Answer

A fungal infection affecting internal organs such as the lungs.

Question 15

Which of the following equations best represents the basic reproductive number ($$R_0) of a $$virus in a population?

Accepted Answer

$$R_0$$ = \frac{\beta}{\gamma}$$

Question 16

Which of the following is a common route of transmission for enteric viruses?

Accepted Answer

Fecal-oral route

Question 17

Which of the following is a plausible reason why prion diseases are difficult to control?

Accepted Answer

Prions are resistant to standard sterilization methods.

Question 18

Which of the following is a plausible outcome of a CNS infection caused by a virus?

Accepted Answer

Development of meningitis or encephalitis

Question 19

Which of the following is a plausible scenario for a cutaneous mycotic infection?

Accepted Answer

A fungal infection affecting the skin

Question 20

Which of the following is a plausible misconception about viruses?

Accepted Answer

Viruses are living organisms capable of independent metabolism.

Overview of Infectious Agents: Chlamydia, Mycoplasmas, Parasites, Fungi, Viruses, and Prions

Study Guide - Practice Questions