Yersiniosis is a relatively uncommon infection contracted through the consumption
of undercooked meat products (especially pork), unpasteurized milk, or contaminated
water.
Usually, someone with an infection caused by Yersinia bacteria recovers
within a few days without medical treatment (in some cases, doctors prescribe antibiotics).
About Yersiniosis
Of the three main types of yersiniosis that affect people, Yersinia enterocolitica
(bacteria that thrive in cooler temperatures) are responsible for most infections
in the United States. The infection seems to be more common in cooler climates.
The bacteria can infect the digestive tracts of humans, cats, dogs, pigs, cattle,
and goats. People can contract it by eating or handling contaminated foods (such as
raw or undercooked meat) or by drinking untreated water or unpasteurized milk that
contain the bacteria.
An infant can be infected if a parent or caretaker handles contaminated food without
cleaning up adequately before handling the baby's toys, bottles, or pacifiers.
Signs and Symptoms
Symptoms of yersiniosis appear 4–7 days after exposure and can last up to
3 weeks. They include fever,
stomach pain, nausea, vomiting, and bloody diarrhea.
Sometimes, older kids also get pain in the lower right side of the abdomen, which
can mimic appendicitis.
Some people also have a sore throat along with other symptoms.
If your child has these symptoms, call your doctor. For infants, it's particularly
important to call the doctor as soon as symptoms appear to prevent the infection from
leading to other health problems.
In rare cases, the infection can cause a skin rash called erythema nodosum,
or joint pain that appears a month after the initial symptoms. The rash usually appears
on the legs and trunk. The joint pain is usually in the larger joints and is thought
to be due to an immune system response. These symptoms usually go away with time but
can last several months.
The diagnosis of Yersinia can be confirmed with a stool culture. If the
Yersinia infection leads to an infection of the blood, known as bacteremia,
it can be confirmed with a blood culture.