Listeria Flashcards Preview

Bacteriology Exam 1 > Listeria > Flashcards

Flashcards in Listeria Deck (20):
1

What is Listeria's mode of pathogenicity?

Intracellular replication

2

Where do Listeria persist inside the body?

In macrophages

3

How is Listeria transmitted from cell to cell?

Through pseudopods

4

Where is Listeria found?

Ubiquitous in soil and carried in GI tract of mammals

5

What is Listeria motility?

Tumbling @25*C

6

What is the shape of Listeria

Coccobacillary rods

7

What environmental conditions is Listeria resistant to?

Cold and high temps and high salt concentrations

8

What is the most common source of listeriosis outbreaks for ruminants and humans, respectively?

Poor silage and food items

9

Which virulence factor aids in the movement of Listeria?

ActA

10

What virulence factors aid in adhesion?

InIA and InIB

11

What virulence factor assists in destroying the phagosome membrane?

Listeriolysis O (LLO)

12

What virulence factor assists with degradation of cytoplasmic and endocytic membranes?

PLCs

13

What are the two modes of infection for ruminants?

Ingestion and inhalation

14

What are the three outcomes of a Listeria infection?

Encephalitis, abortion, septicemia

15

Circling disease and silage disease are common names of which Listeria infection?

L. monocytogenes

16

Encephalitis is Ingestion or inhalation or entry via breaks in oral or nasal mucosa

L. monoctyogenes

17

What seasonality is associated with L. monocytogenes?

Winter-spring disease due to spoiled silage

18

Anorexia, depression, disorientation, walking in circles toward affected side, unilarteral facial nerve paralysis

L. monocytogenes

19

Treatment of septicemic listeriosis

Penicillin, tetracycline, erythromycin, and trimethoprim/sulfonamide

20

Treatment of neuronal listeriosis

Prolonged high doses of ampicillin and gentamicin