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Questions and Answers
What is the primary mode of transmission for Yersinia enterocolitica?
What is the primary mode of transmission for Yersinia enterocolitica?
- Insect vector
- Airborne droplets
- Direct contact with infected animals
- Contaminated food and water (correct)
Which of the following is a common symptom of Yersinia enterocolitica infection?
Which of the following is a common symptom of Yersinia enterocolitica infection?
- Bloody diarrhea (correct)
- Neurological symptoms
- Pneumonia
- Rash
What is the characteristic staining pattern observed in Yersinia enterocolitica?
What is the characteristic staining pattern observed in Yersinia enterocolitica?
- Uniform staining
- No staining
- Gram-positive
- Bipolar 'safety pin' staining (correct)
Which of the following is a common symptom of Yersinia pestis infection?
Which of the following is a common symptom of Yersinia pestis infection?
What is the primary reservoir and mode of transmission for Yersinia pestis?
What is the primary reservoir and mode of transmission for Yersinia pestis?
How does Yersinia enterocolitica evade the immune system?
How does Yersinia enterocolitica evade the immune system?
Which of the following statements regarding Yersinia enterocolitica is NOT true?
Which of the following statements regarding Yersinia enterocolitica is NOT true?
What is the primary virulence factor associated with Yersinia enterocolitica?
What is the primary virulence factor associated with Yersinia enterocolitica?
Which of the following is NOT a common symptom associated with Yersinia enterocolitica infection?
Which of the following is NOT a common symptom associated with Yersinia enterocolitica infection?
What is the primary reservoir and mode of transmission for Yersinia pestis?
What is the primary reservoir and mode of transmission for Yersinia pestis?
Which of the following is a characteristic clinical manifestation of Yersinia pestis infection?
Which of the following is a characteristic clinical manifestation of Yersinia pestis infection?
Which of the following statements about the transmission of Yersinia enterocolitica is NOT true?
Which of the following statements about the transmission of Yersinia enterocolitica is NOT true?
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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
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