Zoonoses Flashcards Preview

L2 > Zoonoses > Flashcards

Flashcards in Zoonoses Deck (11)
Loading flashcards...
1
Q

Yersinia pestis virulence factors

A

PsaA, YadA, YpkA, Yop H, M

2
Q

PsaA

A

pilus adhesin, produced maximally at pH 6 (in phagolysosome); chromosomally encoded, 37 degrees

3
Q

YadA

A

plasmid encoded, 37 degrees; host receptors = beta 1 integrins, laminin, fibronectin

4
Q

Yops

A

plasmid encoded, antiphagocytic

5
Q

YpkA

A

ser/thr kinase activity

6
Q

YopH

A

tyrosine phosphatase activity, inhibits intracellular signaling

7
Q

YopM

A

indirectly affects signaling by preventing platelets from releasing cytokines

8
Q

YopE

A

destroys actin monofilaments

9
Q

LcrV

A

essential for full expression of Yops

10
Q

fraction L Fra1 protein capsule

A

antiphagocytic and activates complement

plasmid-encoded and expressed mostly at 37 degrees

11
Q

Pla (plasminogen activator)

A

degrades C3b and C5a
degrades some Yops
dissolves fibrin clots