This article describes how an investigation was conducted following an outbreak of gastroenteritis among the staff of a major company based in Helsinki, Finland. Most of the patients had eaten lunch at their company cafeteria, whose central kitchen delivers 1,200 to 1,300 lunches daily to the cafeterias of the company’s 59 offices. The suspected food item was a frozen raspberry puree imported from Eastern European countries, as raspberry cultivation is not widespread in Finland. The findings of this investigation and suspicions raised during several similar outbreaks in Finland prompted national food safety authorities to issue provisional recommendations, namely that industrial kitchens should no longer serve unheated dishes prepared with frozen berries. It is possible that berries are a more common vehicle for the transmission of viral gastroenteritis than we realize. New epidemiological studies, combined with the use of new molecular biology techniques, will help assess the role of berries in the transmission of SRSV (small round structured viruses) infections, a group that includes the caliciviruses found in stool samples collected from patients. (R.A.)