Yersinia Flashcards
Which types of Yersinia are zoonotic?
Y. pestis
Y. psuedotuberculosis
Y. enterocolictica
Which genus of Yersinia is a fish pathogen?
Y. ruckeri
Yersinia is a gram ______ bacteria.
Negative
Which type of Yersinia is responsible for the bubonic plague?
Y. pestis
Which domestic animal is Y. pestis most commonly seen in?
Cats
True/False. Cat and dog fleas transmit the diseases caused by Y. pestis.
False.
Cat and dog fleas don’t transmit the disease since their proventriculus do not get blocked during bacterial replication.
Common in RAT FLEAS!
Which months of the year would you see less transmission of Y. pestis?
The summer months. At temps above 27C pestis does not produce this coagulase and does not block the proventriculus.
What does the cell wall of Y. pestis lack that would make it a “rough phenotype”?
No O-antigen
Which virulence factor is unique to Y. pestis?
The capsule
Which toxin that is unique to Y. pestis protects the bacteria from digestive enzymes of fleas?
Ymt (Yersinia mouse toxin)
Which toxin unique to Y. pestis has degradative activity on coagulase, fibrinoytic and C3?
Plasminogen activator
What stain would you use to diagnosis Y. pestis?
Geisma stain
What are the plagues caused by Y. pestis?
Bubonic plague (lymph nodes)
Septicemic plague (DIC)
Pnuemonic plague (pneumonia)
Ocular plague (deer mule - case study)
True/False. Y. pestis is highly antimicrobial resistant.
False. It is rarely resistant.
What organs are typically infected with Y. psuedotuberculosis?
Intestine, abdominal lymphnodes, liver, spleen and septicemia
Which genus of Yersinia causes mastitis in cattle?
Y. pseudotuberculosis
Which species does Y. pseudotuberculosis typically infect?
Birds and rodents
Occasionally in domestic animals (cats) and primates
Which cells does Y. pseudotuberculosis typically targe for adherence?
M cells and basolateral ileal epithelial cells
How is Y. pseudotuberculosis transmitted?
Ingestion
True/False. Animals that survive Y. pseudotuberculosis have a natural aquired immunity.
True
Which Yersinia causes abortions in ruminants and monkeys?
Y. pseudotuberculosis
What months of the year does Y. pseudotuberculosis tend to occur?
Colder months
Which Yersinia is mainly in domestic animals and primates?
Yersinia entercolitica
What diease pattern will Y. enterocolitica cause in domestic animals?
Ileitis, gastroenteritis and mesenteric lymphadenitis
