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Microbiology > Gram Positive Cocci > Flashcards

Gram Positive Cocci Flashcards

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Biology 101 flashcards
1
Q

What organism is:

Catalase +
Bacitracin S
Oxidize glucose

With yellow smooth colonies

A

Micro coccus

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2
Q

What organism is:

Catalase +
Bacitracin R
Coagulate +

Small buff beta hemolytic colonies

A

Staphylococcus aureus

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3
Q

What organism is:

Catalase +
Bacitracin R
Coagulase -
Novobiocin S

White pinpoint colonies

A

Staphylococcus epidermidis

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4
Q

What organism is:

Catalase +
Bacitracin R
Coagulase -
Novobiocin R

Medium white colonies

A

Staphylococcus saprophiticus

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5
Q

What organism is:

Catalase -
Bile esculin +
6.5% NaCl +
Optochin R

Small white colonies

A

Enterococcus faecalis

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6
Q 
Catalase -
Bile esculin -
Beta hemolytic
SXT S
Bacitracin R
A

Group C Streptococcus

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7
Q

Catalase -
Bile esculin +
6.5% NaCl -

A

Group D Strep

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8
Q 
Catalase -
Bile esculin- 
Beta hemolytic 
SXT R
BACITRACIN R
CAMP +

White pinpoint colonies

A

Group B strep ( agalactiae)

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9
Q 
Catalase -
Bile esculin-
Beta hemolytic
SXT R
BACITRACIN S
CAMP -
Hippurate -

White pinpoint colonies

A

Group A Strep

Streptococcus pyogenes

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10
Q 
Catalase -
Bile esculin -
Alpha hemolytic
Optochin S
Bile solubility +
Med large grey
A

Streptococcus pneumoniae

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11
Q 
Catalase -
Bile esculin -
Alpha hemolysis
Optochin R
Bile solubility -
A

Viridans Strep

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12
Q

what enzymes does S. aureus produce?

A 
hemolysins
leukocidins
coagulase
hyaluronidase
nuclease
protease
lipase
Beta lactamase
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13
Q

what are characteristics of streptolysin S?

A

stable in O2

non-antigenic

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14
Q

what are characteristics of streptolysin O?

A

oxygen labile

antigenic

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15
Q

what infections can be caused by s. pyogenes?

A 
pharyngitis
impetigo
eryipselas
wounds
rheumatic fever
glomerulonephritis
scarlet fever
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16
Q

what infections are caused by s. pneumoniae?

A

most common cause of community acquired pneumonia
meningitis
otitis media
conjunctivitis

17
Q

what infection can S. viridans cause?

A

endocarditis

18
Q

S. aureus infections

A

cutaneous ( scalded skin syndrome / wound)
TSS
food poisoning

19
Q

S. saprophyticus infection

A

UTI in young sexually active females

prostatitis

20
Q

GBS infections

A

most common cause of neonatal septicemia and meningitis

21
Q

enterococcus infections

A

nosocomial UTI
wound infections
bacteremia

22
Q

What staph species produces slime?

A

S epidermidis

23
Q

What two antibiotics are used to differentiate staph and micrococcus?

A

Bacitracin - staph R

Furazolidone - staph S

24
Q

Compare staph and micrococcus

A

Staph: modified oxidase -, lysostaphin S, bacitracin R, furazolidane S

Micrococcus: modified oxidase +, lysostaphin R, bacitracin S, furazolidane R

25
Q

What toxins does staph aureus produce?

A

Exfoliatins

Enterotoxins (most food poisoning A and B)

26
Q

Incubation period staph food poisoning

A

2 -6 hours

27
Q

Only PYR + beta hemolytic strep

A

Group A

28
Q

Enterococcus is inherently resistant to what?

A

B lactam antibiotics

Aminoglycosides

29
Q

Quellung reaction

A

Capsular swelling test for strep pneumoniae in body fluids

30
Q

Only strep sensitive to bacitracin

A

Pyogenes

Microbiology (17 decks)

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