An outbreak of cryptosporidium parvum across England and Scotland associated with consumption of fresh pre-cut salad leaves, May 2012

Caoimhe McKerr, Goutam Adak, Gordon Nichols, Russell Gorton, Rachel M. Chalmers, George Kafatos, Paul Cosford, Andre Charlett, Mark Reacher, Kevin G. Pollock, Claire L. Alexander, Stephen Morton

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

Background We report a widespread foodborne outbreak of Cryptosporidium parvum in England and Scotland in May 2012. Cases were more common in female adults, and had no history of foreign travel. Over 300 excess cases were identified during the period of the outbreak. Speciation and microbiological typing revealed the outbreak strain to be C. parvum gp60 subtype IIaA15G2R1. Methods Hypothesis generation questionnaires were administered and an unmatched case control study was undertaken to test the hypotheses raised. Cases and controls were interviewed by telephone. Controls were selected using sequential digit dialling. Information was gathered on demographics, foods consumed and retailers where foods were purchased. Results Seventy-four laboratory confirmed cases and 74 controls were included in analyses. Infection was found to be strongly associated with the consumption of pre-cut mixed salad leaves sold by a single retailer. This is the largest documented outbreak of cryptosporidiosis attributed to a food vehicle.

Original languageEnglish
Article numbere0125955
JournalPLoS ONE
Volume10
Issue number5
DOIs
Publication statusPublished - May 2015

Bibliographical note

Publisher Copyright:
© 2015 McKerr et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

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