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bacteriology > Staph > Flashcards

Staph Flashcards

1
Q

All staph are Aerobic or facultative anaerobic except for

A

S. saccharolyticus

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2
Q

lipochrome fat soluble pigment that is responsible for the
golden pigment production of S. aureus

A

Staphyloxanthin

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3
Q

acts as a virulence factor that provides antioxidant
properties to staph

A

Staphyloxanthin

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4
Q

Associated with UTIs in young women

A

Staphylococcus saprophyticus

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5
Q

This species adheres more effectively to the epithelial cells
lining the urogenital tract than other CoNS

A

S.saphro

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6
Q

Rarely found on other mucous membranes or skin surfaces

A

S.saphro

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7
Q

Infections are predominantly hospital-acquired

A

S.epi

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8
Q

Can cause health-care acquired UTIs and prosthetic valve
endocarditis

A

S.epi

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9
Q

Biofilm productions: key component to its pathogenesis
o biofilm – communities of bacteria that has enclosed
themselves to produce extracellular matrix

A

S.epi

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10
Q

• Has a positive clumping factor test result, but it has a negative
tube coagulase reaction

A

S.lugdu

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11
Q

Can cause both community-associated and hospital-acquired
infections

A

S.lugdu

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12
Q

Known to contain the mecA gene

A

S.lugdu

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13
Q

Can cause an aggressive type of endocarditis

A

S.lugdu

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14
Q

particular gene that codes for methicillin resistance of most
microorganisms

A

S.lugdu

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15
Q

Selective media for s.aureus

A

7.5% NaCl MSA
▪ S. aureus can ferment mannitol

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16
Q

Selective and Differential Media of S.aureus

A

CHROMagar

17
Q

Staphylococci
ferments glucose while micrococcus fails to produce acid under
anaerobic conditions

A

Oxidation-Fermentation (O/F) Reaction

18
Q

most rapid method for separating staphylococci from
other gram-positive cocci

A

Modified Oxidase Test

19
Q

best test for pathogenic S. aureus

A

Coagulase Test

20
Q

reagent for coagulase test

A

Rabbit plasma

21
Q

: used to differentiate
S. aureus (negative) from S. lugdunensis, S. intermedius and S.
schleiferi (positive)

A

Pyrrolidonyl arylamidase (PYR) activity

22
Q

: used to differentiate S. aureus
(positive – red formation on top of media) from S. intermedius
(negative)

A

Vogue-Proskauer (VP) test:

23
Q

Used to differentiate S.saphro and S.epidermidis

A

Novobiocin (5-ug) Susceptibility Testing

bacteriology (24 decks)

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