chapitre 3 structures Flashcards

1
Q

structures obligatoires

A

chromosome
paroi cell

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2
Q

structures falculatives

A

plasmide
capsule
couche mucoïde
flagelles
inclusions cytoplasmiques
endospore
fimbriae
pili

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3
Q

chromosome

A

circulaire, bicaténaire, hélicoïdale
dans nucléoïde

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4
Q

plasmide

A

5-100 gènes
différencient souches
résistance antibio/enzymes métaboliques/facteurs de virulence
peut transférer de bact à autre

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5
Q

capsule

A

polysaccharides (aspect gélatineux)
empêche phagocytose de bact (glisse)
cache composantes qui activent phagocytose

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6
Q

couche mucoïde

A

polysaccharides (aspect visqueux)
adhérence bact (amas)
adhésion a surfaces
résistance chimique + physique
BIOFILM!!!

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7
Q

biofilms

A

groupe bact dans matrice mucoïde
coordonent gènes
++++ résistance antibio (10-1000x)
++++ potentiel infectueux
99%

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8
Q

flagelles

A

répétition flagelline
moteur protéique
permet tactisme (chimio/photo)

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9
Q

types flagelles

A
  1. monotriche
  2. amphitriche
  3. lophotriche
  4. péritriche
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10
Q

monotriche

A

1 flagelle

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11
Q

amphitriche

A

2 flagelles opposées

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12
Q

lophotriche

A

1 côté avec +++ flagelles

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13
Q

péritriche

A

flagelles PARTOUT

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14
Q

inclusions cytoplasmiques

A

dépots de réserve dans cytoplasme

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15
Q

endospore

A

milieu défavorable – sporulation (mort) – endospore avec matériel génétique – favorable – germination

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16
Q

fimbriae

A

courts + nombreux
adhésion
invasion cell
former biofilms + processus infect

17
Q

pili

A

long + –
trnsfert matériel génétique
mobilité sur surface (twitching)

18
Q

structure fim+pili

A

fimbriline/piline + protéine accessoire