Part II: Gram Positive Cocci (CoNS) and Micrococci

Question 1

All test that are positive in S. aureus are NEGATIVE IN CoNS EXCEPT

Answer 1

Catalase Test

Question 2

Coagulase Negative Gram (+) Cocci are (2)

Answer 2

S. epidermidis
S. saphropyticus

Question 3

S. epidermidis

Catalase

Answer 3

Positive

Question 4

S. epidermidis

Coagulase

Answer 4

Negative

Question 5

S. epidermidis

Dnase Test

Answer 5

Negative

Question 6

S. epidermidis

Manitol fermentation test

Answer 6

Negative

Question 7

S. epidermidis

Phosphatase Test

Answer 7

positive

Question 8

S. epidermidis

Gelatinase Test

Answer 8

Positive

Question 9

S. epidermidis

Hemolysis

Answer 9

Gamma

Question 10

S. epidermidis

Novobiocin Susceptibility Test

Answer 10

Susceptible

Question 11

S. epidermidis

Clinical Significance

Answer 11

Heart valve infarction
Stitch Abcess
Urinary Tract Infection (UTI

Question 12

S. saprophyticus

Catalase Test

Answer 12

Positive

Question 13

S. saprophyticus

Coagulase Test

Answer 13

Negative

Question 14

S. saprophyticus

Dnase Test

Answer 14

Negative

Question 15

S. saprophyticus

Mannitol Fermentation Test

Answer 15

Negative

Question 16

S. saprophyticus

Hemolysis

Answer 16

Gamma

Question 17

S. saprophyticus

Novobiocin Test

Answer 17

Resistant

Question 18

S. saprophyticus

Phosphatase Test

Answer 18

Negative

Question 19

S. saprophyticus

Gelatinase Test

Answer 19

Positive

Question 20

S. saprophyticus

Clinical Significance

Answer 20

Most common cause of UTI in young women

• Pyelonephritis
• Cystitis

Question 21

S. epidermidis

Virulence factor

Answer 21

Slime production / Biofilm formation

Question 22

enhances ability of organisms to
attach/adhere to inorganic surfaces (plastic catheters); inhibit/prevent penetration of antibiotics

Answer 22

Slime/Biofilm

Question 23

Gram (+) cocci in tetrads/cuboidal packets

Answer 23

Micrococci

Question 24

Micrococci

a. Strict anaerobe
b. Strict aerobe

Answer 24

strict aerobe

Question 25

Micrococci : Catalase Test

Answer 25

Positive

Question 26

Micrococci : Hemolysis

Answer 26

Gamma

Question 27

Presumptive Test for Genus Micrococci

Answer 27

Modified Oxidase Test / Microoxidase

Question 28

Modified Oxidase Test / Microoxidase

Answer 28

6% Oxidase

Question 29

Modified Oxidase Test / Microoxidase (+) Result

Answer 29

BLUE/PURPLE-BLUE COLOR

Question 30

(Ferment glucose)

Answer 30

Staphylococci

Question 31

(Oxidize glucose)

Answer 31

Micrococci

Question 32

Staphylococci : Aerobic Growth

Answer 32

+

Question 33

Staphylococci : ANAEROBIC
GROWTH

Answer 33

+

Question 34

Staphylococci : LYSOSTAPHIN
SUSCEPTIBILITY

Answer 34

Susceptible

Question 35

Staphylococci : BACITRACIN
SUSCEPTIBILITY

Answer 35

Resistant

Question 36

Staphylococci : FURAZOLIDONE
/ FUROXONE
SUSCEPTIBILITY

Answer 36

Susceptible

Question 37

Staphylococci : CATALASE TEST

Answer 37

+

Question 38

Staphylococci : MODIFIED
OXIDASE TEST

Answer 38

-

Question 39

BENZIDINE TEST

Answer 39

-

Question 40

can produce acid aerobically
and anaerobically;

Answer 40

Ferment glucose

Question 41

can produce acid only in the
presence of air

Answer 41

Oxidize glucose

Question 42

Micrococci : AEROBIC
GROWTH

Answer 42

+

Question 43

Micrococci : ANAEROBIC GROWTH

Answer 43

-

Question 44

Micrococci : LYSOSTAPHIN SUSCEPTIBILITY

Answer 44

Resistant

Question 45

Micrococci : MODIFIED OXIDASE TEST

Answer 45

Positive

Question 46

Micrococci : BACITRACIN SUSCEPTIBILITY

Answer 46

Susceptible

Question 47

Micrococci : FURAZOLIDONE / FUROXONE
SUSCEPTIBILITY

Answer 47

Resistant

Question 48

Micrococci : CATALASE TEST

Answer 48

+

Question 49

Micrococci : BENZIDINE TEST

Answer 49

+