Name of Pathogen: Yersinia enterocolitica Diseases


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Using the attachment as a guide, but DO NOT COPY. Complete the following GI tract infection. Name of Pathogen: Yersinia enterocolitica Diseases Caused: Symptoms: Epidemiology or Pathogenesis (Transmission or Source): Classification of Pathogen: Trigger Words or Hallmarks: Differential Diagnosis: Differential LabTest: Virulence Factors: Treatment: Essential Facts: Fun Fact(s): ATTACHMENT PREVIEW Download attachment GI Tract Cards- Yerienia enterocolitica.docx Name of Pathogen: Yersinia enterocolitica Diseases Caused: Mesenteric adenitis, inflammatory of lymph nodes in the abdomen Enterocolitis, which is an inflammation of the small intestine and colon Symptoms: Bloody diarrhea Low-grade fever Abdominal pain Depending on age: Young Children → Bloody diarrhea Children and young adults → pseudoappendicitis Adults → enterocolitis and post-infective arthritis Epidemiology or Pathogenesis (Transmission or Source): Oral route after contact with infected animal feces Ingestion of contaminated foods in dairy (milk) or meat (pork, pig serves as the primary reservoir) Classification of Pathogen: Gram-negative Rod-shaped Bipolar staining Trigger Words or Hallmarks: Bloody diarrhea Growth in cold temperatures Children and young adults → pseudoappendicitis Differential Diagnosis: Appendicitis Crohn’s Disease Typhoid fever Differential LabTest: Stool culture; usually positive within 2 weeks of onset disease Virulence Factors: Secretes a heat-stable enterotoxin that causes diarrhea Multiplies in coldenvironments o Motile at 25 degrees C o Non-motile at 37 degrees C Invades ileum; necrosis of Peyer’s patch PYV is a plasmid which is resistant to phagocytosis and lysis allowing it to grow in tissue Treatment: Primarily supportive with good nutrition and hydration, but in severe or prolonged illness, first-line drugs used against the bacterium include fluoroquinolones (not approved for use in children under 18 years) and tetracyclines, and aminoglycosides. Essential Facts: Complications associated with Yersiniosis are bacteremia and autoimmune disorders Fun Fact(s): INABILITY to chelate iron; doesn’t produce siderophores but can use those produced by other bacteria Read more

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