Lecture 18 - Ch 27 - Microbial Interactions with Humans

Question 1

Microorganisms usually found associated with human body tissue

Answer 1

normal microbial flora

Question 2

The decrease or loss of virulence

Answer 2

attenuation

Question 3

Organism causes disease by means of a toxin that inhibits host cell function or kills host cells

Answer 3

toxicity

Question 4

Ability of a pathogen to grow in host tissue at densities that inhibit host function

Answer 4

Invasiveness

Question 5

Proteins released from the pathogen cell as it grows

Answer 5

exotoxins

Question 6

what are the 3 types of exotoxins?

Answer 6

Cytolytic toxins
AB toxins
Superantigen toxins

Question 7

which type of toxins are responsible for cell lysis?

Answer 7

Type II - membrane disrupting toxins

Question 8

which type of toxins use enzymatic activity?

Answer 8

Type III - A-B Toxins

Question 9

What are type I toxins?

Answer 9

Superantigens

Question 10

What is an example of a superantigen?

Answer 10

Toxic Shock Syndrome (from Staphylococcus aureus)

Question 11

What is the name of the endotoxin?

Answer 11

lipopolysaccharide (LPS)

Question 12

Where do endotoxins attach to a cell?

Answer 12

the membrane of Gram (-) bacteria