Yersinia & other harmful bacteria and viruses

Information about Yersinia and some other bacteria, viruses and parasites that are not major sources of foodborne illnesses, but can still make you sick.

Fact sheets

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Yersinia pseudotuberculosis symptoms

Yersinia pseudotuberculosis causes stomach cramps and symptoms that mimic appendicitis, such as tummy pain on the right-hand side. Rashes and joint pain are common. You can also get diarrhoea, but this is rare.

Yersinia pseudotuberculosis has a 3 to 21 day incubation period.

How you can be exposed to Yersinia

Yersinia pseudotuberculosis is usually spread by eating or drinking contaminated food or water, particularly raw produce. Person-to-person spread is uncommon.

How you can avoid infection

Follow good food safety practices, most importantly:

  • wash hands with soap and water before eating and preparing food
  • wash fresh fruit and vegetables before eating
  • don't eat raw or undercooked meat.

Investigation into 2014 outbreak

There was a significant outbreak of Yersinia pseudotuberculosis in September 2014. The Ministry for Primary Industries (MPI) investigated but did not find the source of the pathogen.

Read the MPI report on the September 2014 Yersinia outbreak [PDF, 2.3 MB]

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