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Food Microbiology > Listeria > Flashcards

Flashcards in Listeria Deck (9):
1

What temperatures can Listeria grow in?

See top slide on pg 4.

2

What kinds of foods is Listeria monocytogenes associated with?

See top slide of pg 7.

3

How does Listeria infect immunocompromised individuals? Why is this different from healthy adults?

See bottom slide on pg 5 and top slide on pg 6.

4

What is meant by a "saprotroph", and how does this relate to Listeria monocytogenes?

Saprotrophs are organisms found on dead and decaying material, and this is the natural reservoir for Listeria monocytogenes.

5

What is especially noteworthy about the growth temperature and inhibitory salt concentrations for Listeria monocytogenes?

Grows at low temperatures, and at high salt concentrations; for specifics, see slide 7

6

What is meant by "YOPI"?

Young, old, pregnant, immunocompromised. How does this relate to Listeria monocytogenes, and what other organisms discussed this semester also have this characteristic?

7

How does Listeria monocytogenes infection differ between YOPIs and healthy adults?

See slide 10.

8

How do US regulations differ from Europe in terms of Listeria monocytogenes presence in foods?

See top slide of page 8

9

What are three common ways regulatory agencies would like industry to prevent Listeria monocytogenes in foods?

Use lethality step in process, add an antimicrobial, and/or have an excellent sanitation program in place.