Yersinia Flashcards

1
Q

care sunt speciile de Yersinia

A

Y.pestis, Y. enterocolitica si Y. pesudotuberculosisi care sunt si patogene pentru om

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2
Q

ce boala produce Y pestis

A

ciuma

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3
Q

ce produce Y enterocolitica

A

patogen enteric

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4
Q

cine este gazda

A

sangele animalelor bolanve

omul este gazda accidentala

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5
Q

caract morfologice

A
bacili gram -
nesporulati 
capete rotunjite
imobili la 37C
Y pestis - capsulat
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6
Q

care este structura antigenica

A

antigen somatic O => proteaza activatoare a plasminogenului
antigen capsular F1
antigene lipoprotice vw sintetizate
ult 2 au capacitatea de a absorbi Fe

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7
Q

ce rol au antigenele

A

antifagocitar

degradeaza C3b si C5a => impiedicand opsonizarea si fagocitoza

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8
Q

care este perioada de incubatie Y pestis

A

7 zile de la intepatura

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9
Q

ce apare in urma intepaturii

A

o pustula pe unde germenii patrund in limfaticele pielii

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10
Q

ce se int in lipsa tratamentului

A

> 75% din cazuri mor

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11
Q

ce se int in cazul atingerii pulmonare

A

are loc pneumonie hemoragica cu exitus in 48 de h

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12
Q

in ce produse patologice se gaseste Y pestis

A

puroi din bubon
sange
sputa
fragmente de organe

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13
Q

pe ce medii are loc cultivarea

A

medii uzuale : bulion, geloza nutritiva

medii lactozate : AABTL, Mc Conkey

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14
Q

caract de cultura

A

colonii de tip S
margini regulate
colonii mici si translucide
Y pestis => coloni de tip M cu consistenta mucoasa

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15
Q

caract biochimice

A
MIU
TSI
Simmons
glucoza +, zaharoza +
fara gaz
lactoza -
ureaza -
oxidaza -
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16
Q

cum se face identificarea serologica

A

aglutinare cu antiser

coagulaza +

17
Q

tratament

A

streptomicina cu tetraciclina

streptomicina cu cloramfenicol