Host Pathogen Interactions

Question 1

What is a pathogen?

Answer 1

An infectious agent that has the ABILITY to cause disease.

Question 2

What is a strict pathogen?

Answer 2

ALWAYS pathogenic, never part of normal microbiota.

Question 3

What is a commensal?

Answer 3

Part of the normal microbiota.

Question 4

What is the infectious dose?

Answer 4

The number of organisms required to cause disease.

Question 5

Are latent infections contagious?

Answer 5

No.

Question 6

What are the resevoirs of infection?

Answer 6

Environment, Infected person or animals, and self

Question 7

What are the benefits to biofilm formation?

Answer 7

Strength in numbers, resistance to antimicrobials, protection from physiochemical changes and host defenses, genetic exchange.

Question 8

What is a toxin?

Answer 8

A bacterial product that is released to affect host cells at a distance; Bacteria do not need to be present at the site of action.

Question 9

What are the types of toxins?

Answer 9

Endotoxin and Exotoxin.

Question 10

What is an endotoxin?

Answer 10

Produced only by Gram-; LPS

Question 11

What is an exotoxin?

Answer 11

Protein that is released from the bacterial cell that is toxic for target cells or animals; Not unique to Gram+ or Gram-