gram + Flashcards

1
Q

test qui a un interet pour identifier les gram +

A

test de la catalase ajout eau oxygénée sur une bulle d’inoculum

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2
Q

gram + contient 2 grandes groupes

A

sans ou avec catalase

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3
Q

sans catalase

A

Streptoccaceae

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4
Q

Streptoccaceae sans catalase donnent

A

streptocoques et entérocoques

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5
Q

avec catalase

A

Micrococcaceae

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6
Q

Micrococcaceae avec catalase donnent

A

staphylocoque et microcoque

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7
Q

staphylocoque dans le milieu ext

A

très résistant

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8
Q

culture pour staphylocoque

A

ordinaire

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9
Q

parmi 27 staphylocoques on trouve

A

staphylocoque sans ou avec coagulase

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10
Q

staphylocoque sans coagulase

A

S. epidermidis, S. saprophyticus, S. lugdunensis

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11
Q

staphylocoque avec coagulase

A

s. aureus

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12
Q

2 types infections

A

suppuratives
non suppuratives toxigéniques

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13
Q

adhésion s. aureus

A

adhésines
Famille des MSCRAMM (Microbial Surface component Recognizing Adhesive Matrix Molecule)

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14
Q

comment s. aureus échappe le système immunitaire

A

protéine A lie Fab, Fc et vWF
capsule inhibe le ohagocytose
slime de polysaccharides pour une meilleure adhésion

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15
Q

enzyme respo des embolies septiques

A

staphylokinase

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16
Q

enzymes respos de la destruction tissulaire

A

lipase
hyalurodinase

17
Q

s aureus est une bactérie

A

intracellulaire facultative

18
Q

les infections non suppuratives toxiniques dues à s. aureus toxines

A

enterotoxine
épidermolysine
toxine exfoliante
toxic shock syndrome toxin
tsst 1
leucocidine de panton valentine

19
Q

streptocoques

A

fragiles
++ homme
commensaux ou pathogènes

20
Q

streptocoques pathogènes

A

S. pyogenes, S. agalactiae, S. pneumoniae

21
Q
A