In 2013, 33 invasive human listeriosis disease were registered in Austria, including two pregnancies. The 28-day mortality was 24% in 2013 (8 of 33). This high lethality and occasional serious permanent damage, require efforts for earliest possible detection of any food-borne outbreaks.

The example of an outbreak with a serovar 1/2b-Klon (2 cases in 2012 and 2 in the first half of 2013) shows that increased awareness as part of an outbreak investigation, when the causative source of infection can not be definitely proven, leads to increased preventative measures (something may be lost in translation).