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Flashcards in Yersinia Deck (16):
1

Which yersinia is the major zoonotic pathogen?

Yersinia Pestis 

2

What disease does Yersinia Pestis cause?

plague 

3

What yersinia serotype causes enteric red mouth in fish?

Yersinia Ruckeri

*In rainbow trout- Fresh water fish

4

Is yersinia lactose positive or negative?

negative 

5

Yersinia stable toxin is unique to which serotype?

Yersinia Enterocolitica 

6

What does yersinia stable toxin cause?

Leads to opening of calcium channels with flow of water and sodium

leads to Diarrhea 

7

What serotype of Yersinia has the murine toxin?

Yersinisa Pestis 

8

What species is Murine toxin toxic too?

mice and rats 

9

What is the purpose of the murine toxin in Yersinia pestis?

enhances the bacterial colonization in the flea midgut 

10

Cycle of Cat and Flea with Yersinia pestis 

1. fleas become infected after feeding on mammal harboring the bacteria

2. rodents become infected when bitten by infected fleas

3. cats become infected by flea bites or consumption of infected rodents 

4. cats can spread the plaque to humans via scratches, bites, and respiratory secretions

5. humans can also get the bacteria from flea bites 

11

What is the pathogenesis inside the flea with Yersinia pestis 

1. flea feeds on infected host

2. bacteria survive in macrophages and induce apoptosis and Type III secretion system

3. bacteria secrete proteins for further survival

4. Extracellular survival via siderophores and capsule

*First intracelular than extracellular 

12

What species of flea is involved with Yersinia Pestis?

Xenopaylla cheopix- oriental rat flea 

*cat and dog fleas (Ctenocephalides)  do not typically transmit the bacteria 

13

What happens to humans infected with Yersinia pestis?

case fatality 15%

via feline infection, airborne, flea bite, or ingestions of infected meat 

A image thumb
14

What happens to cats that are infected with yersinia pestis?

lymphadenitis

fever, depression, anorexia, tonsillitis, pneumonia

symptomatic cases are often fatal 

15

Yersinia ____ has an incomplete LPS because they do not have the ____ antigen 

Yersinia Pestis 

No O antigen 

16

What kind of stain does Yersinia produce?

Bipolar staining

*looks like safety pin