Bacteria - Toxins

Question 1

What are the two different types of toxins bacteria can produce?

Answer 1

Endotoxins

Exotoxins

Question 2

What are endotoxins?

5 points

Answer 2

Toxins produces inside bacteria cell walls as they grow
They are released only when the bacteria cell dies
Easily destroyed during cooking
Cause infectious food poisoning
Toxin only affects the area of infection

Question 3

What are exotoxins?

5 points

Answer 3

Toxins secreted by bacteria and released directly onto foo outside the cell as they grow
They are produced before or after food is eaten
Difficult to destroy ( 30 minutes of boiling)
Cause toxic food poisoning
Toxin affects parts of the body away from the area of infection

Question 4

What type of toxin produced by bacteria causes infectious food poisoning?

Answer 4

Endotoxins

Question 5

What type of toxin produced by bacteria causes toxic food poisoning?

Answer 5

Exotoxins

Question 6

What is infectious food poisoning?

2

Answer 6

Caused by endotoxins

Incubation period of 12 hours or more

Question 7

What is toxic food poisoning?

Answer 7

Caused by exotoxins

Incubation period of 2 hours or less

Question 8

Name two bacteria which produce endotoxins.

Answer 8

Listeria

E. coli

Question 9

Name two bacteria which produce exotoxins.

Answer 9

Staphylococcus aureus

Clostridium botulinum