Publications & Reports

A possible outbreak of listeriosis caused by an unusual strain of Listeria monocytogenes.

McLauchlin J, Crofts N, Campbell DM
Division of Microbiological Reagents and Quality Control, Central Public Health Laboratory, London, U.K.


During 1987, a cluster of 23 cases of listeriosis due to an unusual serotype of Listeria monocytogenes was identified. All the ‘epidemic’ strains (designated serovar 4b(X)) were indistinguishable by serotyping, phage-typing and monoclonal antibody-typing. Clusters of cases due to this type have not been identified previously in Britain at such a high frequency. In an epidemiological survey, patients were interviewed so as to identify risk factors but none common in all cases was identified.


  • Journal: The Journal of Infection
  • Published: 01/03/1989
  • Volume: 18
  • Issue: 2
  • Pagination: 179-187