Farm, North Wales, London

Payne et al (2003) reported an outbreak of Vero toxin producing E. coli O157:H7 (VTEC O157:H7) causing gastroenteritis among people visiting an open farm in North Wales, London in June 1999. A case-control study was designed which included 16 primary case patients and 36 controls. The preliminary investigation indicated a significant association between attendance on the second day of the festival, eating ice cream or cotton candy and contact with cows or goats. Further multivariable analysis of the data indicated that the only the association of the illness with eating ice cream and cotton candy remained significant.  The researchers suggested that foods on open farms should be eaten only in the dedicated clean areas, and sticky food should be avoided in such events.