Staphylococcus and Streptococcus

Question 0

Which Staphylococcus species may cause UTI in women?

Answer 0

Staphylococcus saprophyticus

Question 1

Which Staphylococcus species is responsible for subacute bacterial endocarditis?

Answer 1

Staphylococcus aureus

Question 2

False about Staphylococcus
A. All are catalase negative
B.grow in the presence of 7.5% NaCl
C. Prefer aerobic conditions

Answer 2

A. All are catalase negative

Cos all are catalase positive

Question 3

False about Staphylococcus aureus 
A. Has hemolysis
B. Produces coagulase
C. Ferments mannitol
D. Resistant to novobiocin

Answer 3

D. Resistant to novobiocin

Sensitive sya. S.saprophyticus is the resistant one

Question 4

False about Staphylococcus epidermidis 
A. All have hemolysis
B. Does not produce coagulase
C. Does not Ferment mannitol
D. Sensitive to novobiocin

Answer 4

A. All have hemolysis

Some do not.

Question 5

False about Staphylococcus saprophyticus
A. All do not have hemolysis
B. Does not produce coagulase
C. Does not Ferment mannitol
D. Resistant to novobiocin

Answer 5

C. Does not Ferment mannitol

Staphylcoccus epidermidis does not ferment mannitol

Question 6

Coagulase (positive, negative) may cause nosocomial infection/ infection acquired fr health care facility

Answer 6

Negative

Question 7

Enzyme produced by Staphylococcus staphyloticus; it destroys Staphylococci

Answer 7

Lyostaphin

Question 8

Specific teichoic acid of Staph aureus cell wall

Answer 8

Ribitol teichoic acid

Question 9

Specific teichoic acid of Staph epidermidis cell wall

Answer 9

Glycerol teichoic acid

Question 10

Exotoxins of Staph aureus cause fever, true or false?

Answer 10

True

Question 11

Toxic shock syndrome toxin is pyrogenic, and it may cause multiple organ dysfunction and shok. What enterotoxin is it nearly similar to?

Answer 11

Enterotoxin F

Question 12

Why is S.aureus sensitive to lyostaphin?

Answer 12

Pentaglycine bridge

Question 13

Staph aureus has staphylokinase. What is the action of this enzyme?

Answer 13

Lyses fibrin

Question 14

Staphylococcal Scalded Skin Syndrome is mainly caused by exfoliatins. What is the mode of action of this enzyme?

Answer 14

Cleaves stratum corneum

Question 15

Localized skin infections caused by Staphylococcus include all except:
A.folliculitis
B.boil
C.impetigo
D.carbuncle
E. Scars

Answer 15

E.scars

Question 16

What is the diff bet carbuncle and furuncle?

Answer 16

Furuncle: boil
Carbuncle: “choco na batok”

Question 17

Systemic illnesses caused by Staphylococcus include all except:
A. osteomyelitis 
B. pneumonia 
C. bacteremia
D. Allergic rhinitis
E.meningitis

Answer 17

D. Allergic rhinitis

Question 18

Most common facial location of Staph aureus

Answer 18

Anterior nares

Question 19

Diabetes mellitus is a predisposing factor of Staph aureus infection. True or false?

Answer 19

True

Question 20

What is phage typing?

Answer 20

using battery of bacteriophages to trace carriers in hospital setting or epidemiological studies in the community

Question 21

Drug of choice for methillin resistant Staph aureus

Answer 21

Vancomycin

Question 22

Staph aureus can be treated by penicillinase-resistant penicillin or 1st-generation cephalosporin. True or false?

Answer 22

True

Question 23

Exfoliative toxin (A,B) may be inactivated by EDTA treatment

Answer 23

A

Question 24

Exfoliative toxin A is bigger than B. True or false?

Answer 24

False

Question 25

Exfoliative toxin A has plasmid DNA while exfoliative toxin B has chromosomal DNA. True or false?

Answer 25

False. Baliktad

Question 26

Toxic shock syndrome is often caused by Staph located in ____

Answer 26

Vagina

Question 27

Patients with septic arthritis MOST often have staphylococci in what body fluid?

Answer 27

Synovial fluid

Question 28

True or false: Streptococci do not require selective media

Answer 28

False, they require selective media

Question 29

True or false: Streptococci- catalase-negative

Answer 29

True

Question 30

``` False about Lancefield system A. Used to classify streptococci B. based on C substance of streptococcal capsule C. From type A to R D. All are false ```

Answer 30

B. based on C substance of streptococcal capsule Cell wall dapat

Question 31

Viridans streptococci and Strep pneumo have what type of hemolysis?

Answer 31

Alpha

Question 32

Lancefield types A,B,C & G have ___ hemolysis

Answer 32

Beta

Question 33

Strep pyogenes has gamma hemolysis, true or false?

Answer 33

False, beta hemolysis dapat.

Question 34

Virulence factor that mediates hemolysis to epithelial cells

Answer 34

F protein

Question 35

Difference between streptolysin S and streptolysin O

Answer 35

Streptolysin O is immunogenic

Question 36

Strep species that Causes neonatal infection & postpartum sepsis

Answer 36

Strep agalactiae

Question 37

Action of streptolysin S & O

Answer 37

Lyses blood cells and stimulates release of lysosomal enzymes

Question 38

Strep species that may cause scarlet fever

Answer 38

Strep pyogenes

Question 39

Strep group that causes abscess formation

Answer 39

"S.milleri" group

Question 40

Strep group that Causes endocarditis and dental caries

Answer 40

Viridans group