Listeria spp.

Question 1

what is the more pathogenic and zoonotic spp of listeria

Answer 1

L. monocytogenes

Question 2

what spp of listeria is known to cause abortion in sheep

Answer 2

L. ivanovii

Question 3

True or False:

listeria is a contagious disease

Answer 3

FALSE

Question 4

what are the forms of listeria

Answer 4

septicemia
abortion
CNS
mastitis

Question 5

what are the characteristics of a listeria bacteria

Answer 5

gram +
rod
non-spore forming
food bourne pathogen

Question 6

why is listeria hard to contain / destroy

Answer 6

grows 3-45 C

Question 7

how can one describe the motility of L. monocytogenes

Answer 7

tumbling motility

Question 8

within a cow, how can listeria be excreted

Answer 8

bovine milk

Question 9

what human foods are listeria associated with

Answer 9

cheese
milk
poultry meat

Question 10

what is the mode of infection of listeria monocytogenes

Answer 10

ingestion
silage pH >5

Question 11

what are the virulence factors of L. monocytogenes

Answer 11

Internalin
listeriolysin O
glyceride factor

Question 12

if L. monocytogenes enters the body through the oral route, what is the likely outcome

Answer 12

circling disease by infection of the trigeminal nerve

Question 13

in L. monocytogenes enter the body through the intestinal mucosa, what is the outcome

Answer 13

abortion
stillbirth

Question 14

if L. monocytogenes enter the body via blood, what is the outcome

Answer 14

meningitis

Question 15

what nerve is often infected with L. monocytogenes

Answer 15

trigeminal nerve

Question 16

what is commonly seen in the CNS form of L. monocytogenes

Answer 16

meningoencephalitis (adults)
meningitis (preruminanting calves)

Question 17

when is CNS form of L. monocytogenes commonly seen

Answer 17

winter and early spring due to bad silage

Question 18

what are the clinical signs of CNS form of L. monocytogenes

Answer 18

depression
drooping ears
head tilt
protrusion of tongue
paralysis of face

Question 19

what is often the outcome of CNS L. monocytogenes

Answer 19

death in 2 to 3 days

Question 20

how does the bacteria of the CNS L. monocytogenes travel through the body

Answer 20

through nerves (trigeminal nerve)

Question 21

what clinical signs are often seen in the abortion form of L. monocytogenes

Answer 21

placentitis
late term abortion

Question 22

what are the clinical signs of septicemic form of L. monocytogenes

Answer 22

depression
dyspnea
salivation
nasal discharge
lacrimation

Question 23

where are lesions commonly found in septicemic infections of L. monocytogenes

Answer 23

liver
spleen
lymph nodes

Question 24

what secondary issues are often seen with septicemic L. monocytogenes

Answer 24

enteritis
myocardial necrosis

Question 25

what type of infection is created with the mastitis form of L. monocytogenes

Answer 25

suppurative infection

Question 26

what species often sees an increase of septicemic form of L. monocytogenes

Answer 26

horses

Question 27

what species more commonly sees encephalitis in occurance with L. monocytogenes

Answer 27

chickens

Question 28

what type of lesions are often seen and help with diagnosis L. monocytogenes

Answer 28

perivascular cuffing