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Flashcards in Staphylococcus and Streptococcus Deck (41):
0

Which Staphylococcus species is responsible for subacute bacterial endocarditis?

Staphylococcus aureus

1

Which Staphylococcus species may cause UTI in women?

Staphylococcus saprophyticus

2

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

A. All are catalase negative

Cos all are catalase positive

3

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

D. Resistant to novobiocin

Sensitive sya. S.saprophyticus is the resistant one

4

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

A. All have hemolysis

Some do not.

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

C. Does not Ferment mannitol

Staphylcoccus epidermidis does not ferment mannitol

6

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

Negative

7

Enzyme produced by Staphylococcus staphyloticus; it destroys Staphylococci

Lyostaphin

8

Specific teichoic acid of Staph aureus cell wall

Ribitol teichoic acid

9

Specific teichoic acid of Staph epidermidis cell wall

Glycerol teichoic acid

10

Exotoxins of Staph aureus cause fever, true or false?

True

11

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

Enterotoxin F

12

Why is S.aureus sensitive to lyostaphin?

Pentaglycine bridge

13

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

Lyses fibrin

14

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

Cleaves stratum corneum

15

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

E.scars

16

What is the diff bet carbuncle and furuncle?

Furuncle: boil
Carbuncle: "choco na batok"

17

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

D. Allergic rhinitis

18

Most common facial location of Staph aureus

Anterior nares

19

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

True

20

What is phage typing?

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

21

Drug of choice for methillin resistant Staph aureus

Vancomycin

22

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

True

23

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

A

24

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

False

25

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

False. Baliktad

26

Toxic shock syndrome is often caused by Staph located in ____

Vagina

27

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

Synovial fluid

28

True or false: Streptococci do not require selective media

False, they require selective media

29

True or false: Streptococci- catalase-negative

True

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

B. based on C substance of streptococcal capsule

Cell wall dapat

31

Viridans streptococci and Strep pneumo have what type of hemolysis?

Alpha

32

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

Beta

33

Strep pyogenes has gamma hemolysis, true or false?

False, beta hemolysis dapat.

34

Virulence factor that mediates hemolysis to epithelial cells

F protein

35

Difference between streptolysin S and streptolysin O

Streptolysin O is immunogenic

36

Strep species that Causes neonatal infection & postpartum sepsis

Strep agalactiae

37

Action of streptolysin S & O

Lyses blood cells and stimulates release of lysosomal enzymes

38

Strep species that may cause scarlet fever

Strep pyogenes

39

Strep group that causes abscess formation

"S.milleri" group

40

Strep group that Causes endocarditis and dental caries

Viridans group