FA Gram Positive Algorithm

Question 1

Gram positive branching filaments must be either

Answer 1

Actinomyces or Nocardia

Question 2

gram + branching filaments, aerobe, acid fast

Answer 2

Nocardia

Question 3

gram + branching filaments, anaerobe, NOT acid fast

Answer 3

Actinomyces

Question 4

Gram + rod

Answer 4

Clostridium (anaerobe)
Corynebacterium
Listeria
Bacillus (aerobe)
Mycobacterium (acid fast)

Question 5

Gram + cocci in clusters

Answer 5

Staph

Question 6

Gram + cocci in chains or pairs

Answer 6

Strep

Question 7

Gram + cocci, catalase +

Answer 7

Staph

Question 8

Gram + cocci, catalase -

Answer 8

Strep

Question 9

Gram +, catalase +, coagulase +

Answer 9

Staph aureus

Question 10

Gram +, catalase+, coagulase -

Answer 10

S epidermidis (Novobiocin sensitive)
S saprophyticus (Novobiocin resistant

Question 11

Novobiocin sensitive

Answer 11

S epidermidis

Question 12

Novobiocin resistant

Answer 12

S saprophyticus

Question 13

Novobiocin:

Answer 13

Saprophyticus is Resistant; Epidermidis is Sensitive

on the office staph retreat, there was NO StRESs

Question 14

Optochin

Answer 14

Viridans is Resistant; Pneumo is sensitive (OVRPS)

Question 15

Bacitracin

Answer 15

group B strep are Resistant; group A strep are Sensitive (B-BRAS)

Question 16

Form green ring around colonies on blood agar

Answer 16

alpha hemolytic bacteria

Question 17

alpha hemolytic bacteria

Answer 17

Strep pneumo

Strep viridans

Question 18

form clear area of hemolysis on blood agar

Answer 18

beta-hemolytic bacteria

Question 19

beta hemolytic bacteria

Answer 19

Staph auresu
Strep pyogenes (group A)
Strep agalatiae (group B)
Listeria monocytogenes

Question 20

tumbling motility

Answer 20

Listeria monocytogenes

Question 21

meningitis in newborns

Answer 21

Listeria monocytogenes

Question 22

unpasteurized milk

Answer 22

Listeria monocytogenes

Question 23

catalase and coag positive

Answer 23

Staph aureus

Question 24

catalase negative + bacitracin sensitive

Answer 24

strep pyogenes (A)

Question 25

catalase negative + bacitracin resistant

Answer 25

Strep agalactiae (B)

Question 26

catalase negative + optochin sensitive, + quellung

Answer 26

strep pneumo

Question 27

catalase negaitve and optochin resistant

Answer 27

viridans

Question 28

no hemolysis =

Answer 28

gamma hemolycsis

Question 29

gamma hemolytic bacteria

Answer 29

Group B strep (enteroccocus)

Nonenteroccoccus

Question 30

gamma hemolytic, growth in bile and 6.5% NaCl

Answer 30

E faecalis

Question 31

gamma hemolytic, growth in bile but not 6.5% NaCl

Answer 31

Strep bovis