rickettsia Flashcards

1
Q

transmission

A

animaux: pou, puce, tique

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2
Q

développement

A

intracellulaire

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3
Q

gram

A

COccobaccile GN, mais pas de coloration de gram

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4
Q

taille

A

petite

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5
Q

classe

A

3 : dangereux pour gens qui manipule

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6
Q

forme

A

bacille

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7
Q

flagelle, spore, capsule

A

-

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8
Q

sensible/ resistante

A

a la chaleur et antiseptique

résistante a la congélation

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9
Q

animaux infectés

A

piqué par les tiques = réservoir

chien, bétail, …

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10
Q

contamination

A

voie cutanée = piqûre, pas de transmission entre homme

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11
Q

physiopathologie

A

piqûre
escarre
diffusion hematogene
atteinte des c endotheliales des petites artères = rx inflammatoires péri vasculaire

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12
Q

clinique : syndrome pseudo grippal

A
fievre bruttale
tache noir ou rouge = escarre 
éruption cutanée puis généralisée (muq)
leucopenie 
thrombopénie
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13
Q

complications

A

insuff renale

purpura fulminans

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14
Q

diagnostic

A

serologie +++: immunofluoresence, western blot
culture sur œuf d’embryon ou c endo
Bm pr bact difficile. pcr, rt pcr, séquençage
test rapide

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15
Q

ttt

A

tetracycline : bonne diffusion intracellulaire

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16
Q

caractère antigènique

A

antigene thermostable specifique

antigene thermosensible peu spécifique

17
Q

transmission

A

par des vecteurs

18
Q

habitat

A

intracellulaire obligatoire