week 3 quiz

 

Week 3 Practice Quiz 1: Pathogenicity & Virulence Results for Phyu Phyu Thant (She/Her)

 Correct answers are hidden.

Submitted Apr 23 at 2:45am

 

Question 1

1 / 1 pts

Arthropods typically serve as which mechanism of transmission for viruses?

  

fomite

 

  

biological vector

 

  

both as fomites and as vectors

 

 

Question 2

4 / 4 pts

Which of the following would be considered a symptom and which would be considered a sign? Label each using the drop down.

1. blood pressure reading of 150/90 mm Hg sign
2. body ache and chills symptom
3. fever of 39 °C sign
4. heart rate of 120 bpm sign
5. blurry vision symptom
6. body ache and chills symptom
7. burning sensation during urination symptom
8. gross hematuria (visible presence of blood in urine) sign

Answer 1:

sign

 

Answer 2:

symptom

 

Answer 3:

sign

 

Answer 4:

sign

 

Answer 5:

symptom

 

Answer 6:

symptom

 

Answer 7:

symptom

 

Answer 8:

sign

 

 

Question 3

1 / 1 pts

Identify which pathogen is the least virulent on the basis of ID50.

  

a pathogen with an ID50 of 50 cells

 

  

a pathogen with an ID50 of 1000 cells

 

  

a pathogen with an ID50 of 1 cell

 

  

pathogenicity cannot be determined from ID50 values

 

 

Question 4

1 / 1 pts

________ are extracellular structures in bacteria that are involved in conjugation and can be used as adhesins.

 

Question 5

1 / 1 pts

What is true of adhesion proteins (referred to as adhesins)?

  

are molecules, receptors, or surface structures necessary for attachment to a host cell.

 

  

help pathogens block immune cells and antibodies.

 

  

help destroy host cells so bacteria can consume host nutrients.

 

  

help bacteria by eliciting systemic inflammation in host.

 

 

Question 6

1 / 1 pts

Endotoxin is produced only by gram-negative bacteria.

 

  

True

 

  

False

 

 

IncorrectQuestion 7

0 / 1 pts

All contacts with a pathogen will result in infection.

  

True

 

  

False

 

 

Question 8

1 / 1 pts

The prodromal period is when the maximum number of pathogen particles or organisms are present in an infected host.

*Review lecture notes. We covered a graph that shows # of pathogens in host vs. each period.

  

True

 

  

False