Micro - Gram Positive Bacteria V

Question 1

gram positive rods non spore formers

Answer 1

corynbacterium diptheriae

listeria monocytogenes

Question 2

diptheria

Answer 2

corynbacterium diptheriae

-colonizes pharynx - leaving a grayish pseudomembrane composed of fibrin, leukocytes, necrosed epithelia

Question 3

child with sore throat and fever

-dark inflammatatory exudate on childs pharynx

Answer 3

corynbacterium diptheriae

Question 4

potassium tellurite agar

Answer 4

for corynbacterium diptheriae

Question 5

loefflers coagulated blood serum

Answer 5

for corynbacterium diptheriae

Question 6

Tx for corynbacterium diptheriae infection

Answer 6

antitoxin
penicillin or erithromycin
DPT vaccine

Question 7

diptheroids

Answer 7

corynbacterium
arcanobacterium
bervivacterium
microbacterium

frequently contaminants of cultures

increasingly causing both community acquired infection and nosocomial infections

Question 8

upper lobe lung nodules and cavities that form air fluid levels

Answer 8

rhodococcus equi infection

**mycobacterium tuberculoid - rarely has air fluid levels

Question 9

rhodococcus equi

Answer 9

gram positive
aerobic nonmotile
bacillary bacteria

can form necrotizing pneumonia in immunocompromised

Question 10

small facultatively anaerobic non-spore forming gram positive rod

Answer 10

listeria monocytogenes

Question 11

listerolysin O

Answer 11

virulence factor of listeria monocytogenes

-allows it to escape phagolysosome of macrophage

Question 12

ingestion of coleslaw, milk, cheese, butter, deli meats by pregnant women who then has neonatal death or premature birth

Answer 12

listeria monocytogenes

Question 13

neonatal meningitis 2 weeks post partum

Answer 13

listeria monocytogenes

Question 14

meningitis in baby first 3 months

Answer 14

listeria monocytogenes
E. coli
group B strep

Question 15

meningitis in baby later in life

Answer 15

neisseria meningititis

haemophilus influenza

Question 16

most common cause of meningitis in > 50 year olds

Answer 16

pneumococcus

Question 17

most common cause of meningitis in patients with lymphoma, on corticosteroids, or receiving organ transplant

Answer 17

listeria monocytogenes

Question 18

why does listeria monocytogenes affect immunocompromised and neonates

Answer 18

facultative intracellular organism

these patients cannot activate phagocytic clls

Question 19

confirmation of bacterial meningitis

Answer 19

lumbar puncture

• high neutrophils
• high protein
• low glcose
• gram stain

Question 20

schick test

Answer 20

injection of diptheria exotoxin into skin

-to determine whether a person is susceptible to infection by corynbacterium diptheriae

Question 21

diagnosis of listeria monocytogenes

Answer 21

gram positive rods in gram stain

culture with cold enrichment

Question 22

dark black colonies on potassium tellurite

Answer 22

corynbacterium diptheriae

Question 23

babes ernst granules on loefflers medium

Answer 23

corynbacterium diptheriae

Question 24

diptheriae

Answer 24

sore throat and fever with pseudomembrane in pharynx

myocarditis
neural involvement