Yersinia Species

How many named species are there for Yersinia?

11

Yersinia pestis causes?

The Plague

How is the The Plague transmittied?

A disease primarily of rodents; transmitted by fleas

What are the two forms of the Plague?

Bubonic and pneumonic

What does the Gram-Stain for Yersinia Pestis look like?

´Gram-negative, short, plump bacillus, exhibiting "safety-pin" or "bipolar" staining.

Yersinia Pestis is a potential?

Bioterrorism agent ( molecular confirmation must be done. )

What two media are used with Yersinia?

´CIN ( cefsulodin-irgasan-novobiocin) agar is selective media for Yersinia. Modified selective agar is called YSA ( Yersinia Selective Agar)

How long does it take Yersinia to grow?

48 hours

What is the most common form of Yersinia?

Yersinia enterocolitica

Where is Y. Enterocolitica found?

Worldwide, in pigs, cats and dogs

How can humans be infected by Y. Enterocolitica?

By ingestion of contaminated food or water

What can some Y. enterocolitica infections result from?

From eating contaminated market meat and vacuum-packed beef

What is Y. Enterocolitica able to survive?

Refrigerator temperatures (can use "cold enrichment" to isolate)

What does Y. Enterocolitica mainly cause?

Acute gastroenteritis with fever

How do patients present with Y. Enterocolitica?

Patients often present with an appendicitis like illness

Y. Pseudotuberculosis is a Pathogen of?

Rodents, particularly guinea pigs

What is caused by Y. Pseudotuberculosis?

Septicemia with mesenteric lymphadenitis, similar to appendicitis

What temperature is Y. Pseudotuberculosis motile?

18 to 22 degrees C