Since the publication of the rapid risk assessment on a multi-country outbreak of Listeria monocytogenes serogroup IVb, multi-locus sequence type 6 (MLST 6) on 6 December 2017, four EU Member States reported seven new confirmed outbreak cases. Two of these cases were fatal.

Since the publication of the joint ECDC-EFSA rapid outbreak assessment on a multi-country outbreak of Listeria monocytogenes serogroup IVb, multi-locus sequence type 6 (ST 6) on 22 March 2018, three EU Member States have reported nine new confirmed outbreak cases.

ECDC has identified a microbiological link between an outbreak of nine Listeria monocytogenes ST1247 cases in Denmark and nine additional cases reported between 2014 and 2018 in Estonia (2 cases) Finland (2), France (1) and Sweden (4).