An outbreak of Listeria monocytogenes linked to pork sausages may have killed at least 12 people and sickened another eight in recent months, according to multiple news sources. Danish authorities said they closed down a small meat producer near Copenhagen on Monday in connection with the outbreak. The producer, Hedehusene, made a variety of rolled pork sausage called rullepølse, or spiced meat roll. The sausage product has been recalled in Denmark. Authorities are now trying to determine if any of the recalled product had been exported. The outbreak is now believed to be under control, but not before it hit elderly victims and others with weakened immune systems especially hard. Those who died were also suffering from other medical complications, but their infections are believed to have been a contributing factor in their deaths. Symptoms of Listeria infection include fever, nausea, diarrhea and vomiting. Most patients begin feeling symptoms anywhere from seven to 21 days after infection.