MTAP: Staphylococcus & Micrococcus

Question 1

R/S: Lysostaphin; Staphylococcus

Answer 1

S

Question 2

R/S: Lysostaphin; Micrococcus

Answer 2

R

Question 3

R/S: Furazolidone; Staphylococcus

Answer 3

S

Question 4

R/S: Furazolidone; Micrococcus

Answer 4

R

Question 5

R/S: Bacitracin; Staphylococcus

Answer 5

R

Question 6

R/S: Bacitracin; Micrococcus

Answer 6

S

Question 7

Heat stable exotoxin of S. aureus that causes food poisoning

Answer 7

Enterotoxin A

Question 8

Color of colonies of S. aureus in MSA

Answer 8

Yellow

Question 9

The deeper abscess causes by S. aureus

Answer 9

Carbuncles

Question 10

Organism that causes scalded skin syndrome/ Ritter Lyell disease

Answer 10

S. aureus

Question 11

Hemolytic pattern of S. epidermidis

Answer 11

Gamma hemolytic

Question 12

Urease reaction of S. epidermidis

Answer 12

(+)

Question 13

Normal flora of the skin that causes stitch abscess and prostatic valve infectious endocarditis

Answer 13

S. epidermidis

Question 14

2nd most common cause of UTI and is common among sexually active women

Answer 14

S. saprophyticus

Question 15

Causes “honeymoon cystitis”

Answer 15

S. saprophyticus

Question 16

R/S: Novobiocin; S. epidermidis

Answer 16

S

Question 17

R/S: Novobiocin; S. saprophyticus

Answer 17

R

Question 18

Associated with sepsis and endocarditis with high mortality rate

Answer 18

S. lugdunensis

Question 19

R/S: Polymyxin B; S. epidermidis

Answer 19

R

Question 20

R/S: Polymyxin B; S. saprophyticus

Answer 20

S

Question 21

Organism that exhibits positive result in slide coagulase but is tube coagulase negative

Answer 21

S. lugdunensis

Question 22

Definitive test for S. lugdunensis

Answer 22

ODC (Ornithine Decarboxylase Test)

Question 23

Selective and differential agar for Staphylococcus

Answer 23

MSA

Question 24

Inhibitor used in MSA

Answer 24

7.5% NaCl

Question 25

Indicator used in MSA

Answer 25

Phenol red

Question 26

Reagent used in catalase test, which differentiates Staphylococcus from Streptococcus

Answer 26

3% H2O2

Question 27

Which Staphylococcus spp. is positive for DNAse test?

Answer 27

S. aureus

Question 28

Positive result of DNAse test

Answer 28

Clearing around the colony

Question 29

If the tube coagulase test is negative within 4 hours at 37C, it should be reincubated at what conditions?

Answer 29

room temp for 20 hours

Question 30

Reagent used for coagulase test

Answer 30

Rabbit's plasma

Question 31

S. aureus infection common in females using tampons

Answer 31

Toxic shock syndrome

Question 31

Primary reservoir of S. aureus in humans

Answer 31

Nares

Question 32

Skin infection with vesicular lesions caused by S. aureus

Answer 32

Impetigo

Question 33

Incubation period of S. aureus food poisoning

Answer 33

2-8 hrs

Question 34

Commonly colonizes medical devices

Answer 34

S. epidermidis

Question 35

Causes pyoderma in dogs

Answer 35

S. intermedius

Question 36

Color of S. aureus colonies in CHROMagar

Answer 36

Mauve/ Pink

Question 37

Hemolytic pattern of S. lugdunensis

Answer 37

Beta hemolytic

Question 38

Inhibitor in CHROMagar that inhibits the growth of other Staphylococcus spp.

Answer 38

Cefoxitin

Question 39

VP reaction of S. aureus

Answer 39

(+)

Question 40

Gold standard for MRSA detection

Answer 40

mecA gene detection

Question 41

Recommended screening for MRSA

Answer 41

Cefoxitin test

Question 42

Treatment of choice for MRSA

Answer 42

Vancomycin

Question 43

Treatment of choice for VRSA

Answer 43

Linezolid

Question 44

Hemolytic pattern of S. aureus

Answer 44

Beta hemolytic

Question 45

Staphylococcus spp. with heat stable nuclease

Answer 45

S. aureus

Question 46

R/S: Polymyxin B; S. haemolyticus

Answer 46

S