Rapid risk assessment: Multi-country outbreak of Listeria monocytogenes PCR serogroup IVb, MLST ST6

Risk assessment
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European Centre for Disease Prevention and Control. Multi-country outbreak of Listeria monocytogenes PCR serogroup IVb MLST ST6 – 6 December 2017, Stockholm: ECDC; 2017.

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A multi-country outbreak of Listeria monocytogenes PCR serogroup IVb, MLST ST6 has been ongoing in the EU/EEA since at least 2015. Twenty-six cases from Austria, Denmark, Finland, Sweden and the United Kingdom have been classified as a confirmed microbiological cluster on the basis of whole genome sequencing (WGS) analysis, including core genome multi-locus sequence typing (cgMLST) and single nucleotide polymorphism (SNP)-based analysis, depending on the country. Four cases have died (case fatality 15.4%).

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