Denmark’s Statens Serum Institut has been investigating an outbreak caused by Salmonella Strathcona. This serotype has not previously been detected in Denmark, and it has never before been recognized as the source of an outbreak.

The outbreak included a total of 40 culture confirmed cases registered in the Danish National Laboratory Surveillance System. The cases, 24 females and 16 males, comprised children and grown-ups from all over the country. The first patient became ill on Sept. 4, 2011, and the last on Oct. 14, 2011. During the same period, 14 cases in Germany and one in Austria were reported.

Small, elongated tomatoes of the type datterino have been found to be the source of the infections. The tomatoes, deriving from a producer in southern Italy, have primarily been sold from the supermarket chain, "Rema 1000." The tomatoes are no longer available from the supermarket chain, and the outbreak has most likely now stopped.

Tomatoes have not before been recognized as the source of salmonella outbreaks in Denmark, however, the U.S. has seen several foodborne outbreaks associated with contaminated tomatoes.

Danish authorities are again recommending frozen raspberries be rapidly boiled before being used in smoothies, desserts and other dishes. The fruit must cook one minute.

Outbreaks of norovirus have stricken hospital staff, canteen and restaurant guests and individuals who have been eating frozen raspberries from abroad.

"Food Administration takes this situation very seriously, and that is why we now recommend the boiling of frozen raspberries both at home and businesses such as restaurants and cafeterias," says Annette Perge in the Food Agency.
 

Twice as many people in Denmark contracted listeriosis in 2009 compared with the previous year – and noone seems to know why.

The Copenhagen Post reports the latest figures from the National Food Institute at the Technical University of Denmark (DTU) show that Denmark has the highest number of cases of the rare and potentially lethal bacterial disease (presumably within the EU).

Jens Kirk Andersen, an expert from the National Food Institute said that it is often difficult to identify the source of listeria infections because it may take anything from two days to two months before symptoms appear.
 

Eurosurveillance reports at least 11 linked outbreaks of gastroenteritis with a total of 260 cases have occurred in Denmark in mid January 2010. Investigations showed that the outbreaks were caused by norovirus of several genotypes and by enterotoxigenic Escherichia coli. Lettuce of the lollo bionda type grown in France was found to be the vehicle.

From 18 to 20 January 2010, a series of outbreaks of gastroenteritis were reported to Danish authorities. Outbreak investigations were initiated by the Danish food control authority in cooperation with Statens Serum Institut (SSI), the National Food Institute, the Food and Veterinary Administration as well as the medical officers and several clinical microbiological laboratories in Copenhagen. The epidemiological, microbiological and food investigation are still ongoing; here we report on the current status of the investigation of these outbreaks.

The link between lettuce and illness was discovered in the fourth week of January 2010 based on an analysis of five outbreaks. These outbreaks had been reported during week 3 to the regional food control authority, which covers the eastern part of Denmark. As of 8 February, 11 outbreaks have been included in the cluster. A further eight outbreaks in Denmark which are currently under investigation may also be associated with lettuce. Taken together, the 11 outbreaks comprised approximately 480 potentially exposed persons and approximately 260 cases with symptoms of gastroenteritis . The 11 outbreaks all took place in the eastern half of the country (on the islands of Funen and Zealand). Norovirus was initially suspected as the aetiology, but the Kaplan criteria were not fulfilled in all circumstances and attack rates were sometimes higher than expected for norovirus, indicating the possibility of the presence of more than one disease agent.