World's Toughest Trivia Quiz On Microbiology!

229 Questions | By Stephens | Last updated: Mar 21, 2022 | Total Attempts: 240

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How good are you when it comes to knowledge on microbiology? The quiz below is considered the toughest trivia and is designed to sieve out the best out of all the top students in the class. Do you think that you can take it up and see if you are among the top students in the class? Well, do give it a shot and see how good you will do.

Questions and Answers

1.

Which type of infection can be caused by septicemia?
- A.
  
  Systemic infection
- B.
  
  Focal infection
- C.
  
  Local infection
- D.
  
  Bacteremia
- E.
  
  Septicemia
2.

Transient microbiota differ from normal microbiota because transient microbiota
- A.
  
  Are present for a relatively short time
- B.
  
  Cause diseases
- C.
  
  Are found in a certain location on the host
- D.
  
  Are acquired by direct contact
- E.
  
  None of the above
3.

Which of the following definitions is incorrect?
- A.
  
  Pandemic - a disease that affects a large number of people in the world in a short time
- B.
  
  Endemic - a disease that is constantly present in a population
- C.
  
  Epidemic - a fraction of the population having a disease at a specified time
- D.
  
  Sporadic - a disease that affects a population occasionally
- E.
  
  None of the above
4.

Which of the following is a fomite?
- A.
  
  Insects
- B.
  
  Droplets from a sneeze
- C.
  
  Water
- D.
  
  A hypodermic needle
- E.
  
  Pus
5.

A commensal bacterium
- A.
  
  Does not receive any benefit from its host
- B.
  
  Is beneficial to its host
- C.
  
  May be an opportunistic pathogen
- D.
  
  Does not infect its host
- E.
  
  B and d only
6.

A nosocomial infection is
- A.
  
  Only a result of surgery
- B.
  
  Acquired during the course of hospitalization
- C.
  
  always present but inapparent at the time of hospitalization
- D.
  
  Always caused by medical personnel
- E.
  
  Always caused by pathogenic bacteria
7.

The major significance of Koch's work was that
- A.
  
  Microorganisms are present in a diseased animal.
- B.
  
  Diseases can be transmitted from one animal to another
- C.
  
  Microorganisms can be cultured
- D.
  
  Microorganisms are the result of disease.
- E.
  
  Microorganisms cause disease.
8.

The science that deals with when diseases occur and how they are transmitted is called
- A.
  
  Ecology
- B.
  
  Epidemiology
- C.
  
  Communicable disease
- D.
  
  Morbidity and mortality
- E.
  
  Public health
9.

Symptoms of disease differ from signs of disease in that symptoms
- A.
  
  Always occur as part of a syndrome
- B.
  
  Are changes felt by the patient
- C.
  
  Are changes observed by the physician
- D.
  
  Are specific for a particular disease
- E.
  
  None of the above
10.

All of the following are communicable diseases except
- A.
  
  Tyhphoid fever
- B.
  
  Tuberculosis
- C.
  
  Tetanus
- D.
  
  Malaria
- E.
  
  AIDS
11.

Which of the following does NOT contribute to a pathogen's invasiveness?
- A.
  
  Cell wall
- B.
  
  Capsule
- C.
  
  Toxins
- D.
  
  Ligands
- E.
  
  Hyaluronidase
12.

A needlestick is an example of which portal of entry?
- A.
  
  Skin
- B.
  
  Paranaternal route
- C.
  
  Mucous membranes
- D.
  
  All of the above
- E.
  
  None of the above
13.

All of the following are types of exotoxins EXCEPT
- A.
  
  Lipid A
- B.
  
  Membrane disrupting toxins
- C.
  
  AB toxins
- D.
  
  Superantigens
- E.
  
  All of the above are types of exotoxins
14.

Which of the following statements about exotoxins is generally NOT true?
- A.
  
  They are composed of proteins
- B.
  
  They are not required in high concentrations to be effective
- C.
  
  They are not destroyed by heat
- D.
  
  They have specific methods of action
- E.
  
  They are more potent than endotoxins
15.

Cytopathic effects are changes in host cells due to
- A.
  
  Viral infections
- B.
  
  Protozoan and helminthic infections
- C.
  
  Bacterial infections
- D.
  
  Fungal infections
- E.
  
  All of the above
16.

All of the following are methods of penetrating and/or avoiding the host EXCEPT
- A.
  
  Antigenic changes
- B.
  
  Membrane-disrupting toxins
- C.
  
  Hyaluronidase
- D.
  
  IgA proteases
- E.
  
  Invasins
17.

Siderophores are bacterial proteins that compete with animal
- A.
  
  White blood cells
- B.
  
  Transferrins
- C.
  
  Antibodies
- D.
  
  Red blood cells
- E.
  
  Ferrodoxins
18.

Endotoxins are
- A.
  
  Required only in minute amounts
- B.
  
  Excreted from the cell
- C.
  
  Associated with Gram-positive bacteria
- D.
  
  Specific in their mode of action
- E.
  
  Part of the Gram-negative cell wall
19.

The most frequently used portal of entry for pathogens is the
- A.
  
  Mucous membranes of the respiratory tract
- B.
  
  Mucous membranes of the genitourinary tract.
- C.
  
  Skin
- D.
  
  Parenteral route
- E.
  
  All of the above
20.

Botulism is caused by an exotoxin, therefore it could be easily prevented by
- A.
  
  Administering antibiotics to patients.
- B.
  
  Boiling food prior to consumption
- C.
  
  Including antibiotics in the canning process
- D.
  
  Preventing fecal contamination of food
- E.
  
  Just not eating canned food
21.

Which of the following is involved in specific resistance (immunity)?
- A.
  
  Monocyte
- B.
  
  Basophil
- C.
  
  Neutrophil
- D.
  
  Lymphocyte
- E.
  
  Eosinophil
22.

All of the following are associated with complement fixation EXCEPT
- A.
  
  Inflammation
- B.
  
  Cell lysis
- C.
  
  Membrane attack complex
- D.
  
  Increased phagocytic activity
- E.
  
  Fever
23.

Which of the following is involved in fighting parasitic infections?
- A.
  
  Eosinophil
- B.
  
  Basophil
- C.
  
  Lymphocyte
- D.
  
  Neutrophil
- E.
  
  Monocyte
24.

All of the following occur during inflammation. What is the first step?
- A.
  
  Vasodilation
- B.
  
  Diapedesis
- C.
  
  Repair
- D.
  
  Phagocyte migration
- E.
  
  Margination
25.

Which of the following is NOT a characteristic of inflammation?
- A.
  
  Fever
- B.
  
  Local heat
- C.
  
  Pain
- D.
  
  Swelling
- E.
  
  Redness