Cryptosporidiosis outbreak in visitors of a UK industry-compliant petting farm caused by a rare Cryptosporidium parvum subtype: A case-control study

L. Utsi*, S. J. Smith, R. M. Chalmers, S. Padfield

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

A case-control study was conducted to investigate an outbreak of 46 cases of cryptosporidiosis in visitors to a petting farm in England. Details of exposures on the farm were collected for 38 cases and 39 controls, recruited through snowball sampling. Multivariable logistic regression identified that cases were 5.5 times more likely than controls to have eaten without washing their hands [95% confidence interval (CI) 1.51-19.9, P = 0.01] and 10 times less likely to report being informed of risk of infection on arrival (odds ratio 0.10, 95% CI 0.01-0.71, P = 0.02). An uncommon Cryptosporidium parvum gp60 subtype (IIaA19G1R1) was identified in a lamb faecal sample and all subtyped cases (n = 22). We conclude that lack of verbal advice and non-compliance with hand washing are significantly associated with a risk of cryptosporidiosis on open farms. These findings highlight the public health importance of effectively communicating risk to petting farm visitors in order to prevent future outbreaks of zoonotic infections.

Original languageEnglish
Pages (from-to)1000-1009
Number of pages10
JournalEpidemiology and Infection
Volume144
Issue number5
DOIs
Publication statusPublished - 1 Apr 2016

Bibliographical note

Publisher Copyright:
Copyright © Cambridge University Press 2015.

Keywords

  • Cryptosporidium
  • hand hygiene
  • outbreaks
  • public health
  • zoonoses

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