An outbreak of diarrhoea in a hotel affected 25 time keepers attending the 1997, Mediterranean Games. Epidemiological investigation implicated a 'pasta a ragu' consumed at the hotels restaurant and Clostridium perfringens food poisoning was identified by direct detection of C. perfringens enterotoxin in patients stools. This report confirms that a careful evaluation of epidemiological features, together with the availability of direct and rapid laboratory methods, may lead to a prompt identification of C. perfringens food poisioning. (C) 1999 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.