12 Questions
What is the primary mode of transmission for Yersinia enterocolitica?
Contaminated food and water
Which of the following is a common symptom of Yersinia enterocolitica infection?
Bloody diarrhea
What is the characteristic staining pattern observed in Yersinia enterocolitica?
Bipolar 'safety pin' staining
Which of the following is a common symptom of Yersinia pestis infection?
Buboes
What is the primary reservoir and mode of transmission for Yersinia pestis?
Rodents and their fleas
How does Yersinia enterocolitica evade the immune system?
Through the production of a glass capsule
Which of the following statements regarding Yersinia enterocolitica is NOT true?
It is a gram-negative bacterium.
What is the primary virulence factor associated with Yersinia enterocolitica?
Capsule formation
Which of the following is NOT a common symptom associated with Yersinia enterocolitica infection?
Pneumonia
What is the primary reservoir and mode of transmission for Yersinia pestis?
Rodents and their fleas
Which of the following is a characteristic clinical manifestation of Yersinia pestis infection?
Buboes (swollen lymph nodes)
Which of the following statements about the transmission of Yersinia enterocolitica is NOT true?
It can be transmitted through direct person-to-person contact.
Study Notes
Yersinia Enterocolitica
- Gram-negative bacteria with a red hue
- Also known as enterocholitica due to its association with the English terrier
- Transmission occurs through zoonotic means, such as:
- Puppy feces
- Contaminated milk products
- Children are the most common individuals infected
- Resistant to cold temperatures, similar to listeria
- Exhibits bipolar "safety pin" staining, with heavy staining on two ends
- Pathogenesis involves an encapsulated virulence factor
- Diseases caused by Yersinia enterocolitica include:
- Bloody diarrhea
- Invasive systemic effects:
- Fever
- Intestinal issues
- Leukocytosis
- Abscesses
- Major bowel issues
- Necrotic bowel
- Pseudoappendicitis, which mimics appendicitis with symptoms such as:
- RLQ pain
- Fever
- Elevated white count
Yersinia Pestis
- Reservoir and transmission occur through zoonotic means, involving:
- Rodents (usually rats or prairie dogs in the US) as the primary host
- Fleas as vectors that bite humans
- Forms buboes with swollen tender lymph nodes
- Transmitted through human as incidental host, usually with rodents or prairie dogs in the US
Test your knowledge about Yersinia enterocolitica and pestis through this quiz. Learn about the characteristics, transmission, and staining properties of these bacteria.
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