Yersinia enterocolitica - MegaMicro

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Yersinia enterocolitica

Microbiology > Bacteriology > Gram-negative bacteria > Gram-negative bacilli > Enterobacteriaceae > Yersinia
a.       Structure
Y enterocolitica is a gram negative bacilli. It is a lactose non-fermenter and is motile at 25 degrees Celsius.
b.      Pathobiology
Y enterocolitica can be found in animals and humans. Incubation is typically 4-6 days. It  secretes heat stable enterotoxin, which causes diarrhea and colitis. Rarely, it can cause sepsis. Serious gastrointestinal complications can also occur.
c.       Epidemiology
Y enterocolitica infection most often occurs from consuming undercooked pork or unpasteurized milk. Infection is more common in Europe.
d.      Laboratory diagnosis
Y enterocolitica is typically diagnosed through stool culture. It should be cultured on cefsulodin-irgasan-novobiocin(CIN).
e.      Disease manifestations
  • Enterocolitis is primary manfestation
  • incubation 1-10 days
  • diarrhea, fever, abdominal pain
  • disease can mimic acute appendicitis if it involves mesenteric lymph nodes

f. Diagnosis is made through laboratory testing.
                        ii.      Differential diagnosis includes other causes of febrile gastroenteritis. In some patients pharyngitis may suggest Y enterocolitica infection.
                       iii.      Treatment is generally not indicated, but fluoroquinolones may be effective.

g.  Prevention can be encouraged through proper food safety and preparation. It may also be possible to reduce the population of pigs that carry the disease.

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Additional resources:
Centers for Disease Control and Prevention. (2016). Yersinia enterocolitica (Yersiniosis).                   
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