Bacterial Classification And ID/Gram Positive Cocci

Question 1

Eukaryotes ribosomes

Answer 1

80S

Question 2

Prokaryotes ribosomes

Answer 2

70S

Question 3

CNA agar

Answer 3

colistin solubilzes outer cytoplasmic membrane of gram neg bacteria
nalidixic acid blocks DNA synthesis

Question 4

PEA agar

Answer 4

phenylethyl alcohol alters membrane permeability allowing influx and efflux of normally blocked substances

Question 5

Staph aureus ID

Answer 5

coagulase (+)
catalase (+)
growth in 7.5% NaCl
ferment mannitol

Question 6

Staph aureus infections

Answer 6

furuncles (boils)
bullous impetigo
wounds
bacteremia

Question 7

Staph aureus intoxications

Answer 7

scalded skin syndrome
toxic shock syndrome
gastritis/food poisoning (enterotoxin, 1-5 hrs after eating)

Question 8

Staph aureus info

Answer 8

most beta lactamase (+)

many MRSA

Question 9

Staph aureus resistance/sensitivity

Answer 9

most (R) to penicillin due to plasmid mediated B lactamase

if MRSA, vancomycin is drug of choice

Question 10

Staph aureus BAP

Answer 10

soft, opaque, regular colonies
some beta hemolytic
some have pale golden color

Question 11

Coagulase (-) Staph

Answer 11

opportunist in immunocompromised hosts and patients with prosthetic valves and devices

Question 12

Staph species

Answer 12

gram positive clusters

Question 13

Strep species

Answer 13

gram positive pairs and chains

Question 14

Staph epidermidis info

Answer 14

methicillin (R)

sensitive to novobiocin

Question 15

Staph saprophyticus infections

Answer 15

UTI in young women

Question 16

Staph saprophyticus info

Answer 16

(R) to novobiocin

Question 17

Strep pyogenes info

Answer 17

beta hemolytic
bacitracin (S)
optochin (R)
PYR (+)

Question 18

Strep pyogenes

Answer 18

group A strep

Question 19

Strep pyogenes infections

Answer 19

pharyngitis
wounds
scarlet fever - strawberry tongue
impetigo
sequelae-rheumatic fever
necrotizing fasciitis

Question 20

Strep agalactiae

Answer 20

group B strep

Question 21

Strep agalactiae info

Answer 21

beta/gamma hemolytic
hippurate (+)
CAMP (+)

Question 22

Strep agalactiae infections

Answer 22

neonatal septicemia and meningitis

UTI (CAMP +)

Question 23

Enterococcus info

Answer 23

alpha/beta/gamma hemolytic
bile esculin (+)
6.5% NaCl (+)
PYR (+)

Question 24

Enterococcus infections

Answer 24

UTI
endocarditis (treat with aminoglycoside + penicillin)

Question 25

non-Enterococcus

Answer 25

group D

Question 26

non-Enterococcus group D strep

Answer 26

alpha/gamma hemolysis
bile Esculin (+)

Question 27

Strep bovis

Answer 27

associated with colon cancer

Question 28

Strep pneumoniae

Answer 28

alpha hemolytic (water drop crater colonies)
optochin (S)
bile solubility (+)

Question 29

Strep viridans

Answer 29

alpha/gamma hemolytic

Question 30

Bacteremia

Answer 30

bacterial infections in bloodstream

Question 31

Meningitis

Answer 31

bacterial infection of outer membrane of brain

Question 32

Vanco intermediate staph aureus

Answer 32

overproduction of cell wall target

Question 33

Vanco resistance staph aureus

Answer 33

alteration of cell wall target