Payne CJI, Petrovic M, Roberts RJ, Paul A, Linnane E, Walker M, Kirby D, Burgess A, Smith RMM, Cheasty T, Willshaw G, Salmon RL. Vero cytotoxin-producing Escherichia coli O157 gastroenteritis in farm visitors, North Wales.
Emerg Infect Dis 2003;
9:526-30. [PMID:
12737734 PMCID:
PMC2972679 DOI:
10.3201/eid0905.020237]
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Abstract
An outbreak of Vero cytotoxin-producing Escherichia coli O157 (VTEC O157) gastroenteritis in visitors to an open farm in North Wales resulted in 17 primary and 7 secondary cases of illness. E. coli O157 Vero cytotoxin type 2, phage type 2 was isolated from 23 human cases and environmental animal fecal samples. A case-control study of 16 primary case-patients and 36 controls (all children) showed a significant association with attendance on the 2nd day of a festival, eating ice cream or cotton candy (candy floss), and contact with cows or goats. On multivariable analysis, only the association between illness and ice cream (odds ratio [OR]=11.99, 95% confidence interval [CI] 1.04 to 137.76) and cotton candy (OR=51.90, 95% CI 2.77 to 970.67) remained significant. In addition to supervised handwashing, we recommend that foods on open farms only be eaten in dedicated clean areas and that sticky foods be discouraged.
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