News

E. coli STEC in ground beef – Source of foodborne infection confirmed by whole-sequencing of Matís

Contact

Sæmundur Sveinsson

Research Group Leader

saemundurs@matis.is

Matís can identify whether E.coli STEC is in food products

Over the past two weeks, Matís' experts have been working hard to trace the source of the group infection E. coli STEC that appeared in a kindergarten in Reykjavík in mid-October. The study was carried out in close collaboration with the National Food Agency, the Epidemiologist, the Department of Pathology and Virology of Landspítál and the Reykjavík Health Authority.

A number of suspect foods were screened for
E. coli STEC but this bacterium can hide in many places. It soon became clear that mincemeat, which was used in cooking at the kindergarten, was by far the most likely source of the infection. A large number of bacterial strains were cultured from the mince, and finally three strains containing characteristic virulence genes and of the same serotype as the strain isolated from the patient were isolated. The genomes of these four strains were finally sequenced at Matís. That analysis revealed that the strains from the hack and the patient were genetically identical. Matís was a pioneer in the implementation of this methodology in Iceland to trace the origin of foodborne infections.

Finally, Matís would like to draw attention to the fact that the company offers analyzes of E. coli STEC in food. Matís is a reference laboratory (NRL) for these analyzes in Iceland. This means that Matís constantly updates his methods according to the latest knowledge and methods in Europe. E. coli STEC is a bacteria that can cause serious illness.

Press release MAST

Reports

Quality survey of minced beef in January 2010 / Evaluation of the quality of minced beef in January 2010

Published:

01/03/2010

Authors:

Ólafur Reykdal, Óli Þór Hilmarsson, Guðjón Þorkelsson

Supported by:

National Association of Cow Farmers, Ministry of Fisheries and Agriculture, Consumer Association

Contact

Ólafur Reykdal

Project Manager

olafur.reykdal@matis.is

Quality survey of minced beef in January 2010 / Evaluation of the quality of minced beef in January 2010

In mid-January 2010, a survey was conducted on the content and labeling of ground beef. Eight samples were taken from pre-packaged ground beef in shops in the capital area. The labeling of the packaging was examined with regard to the provisions in regulations. Measurements were made of meat species, soy protein, fat, protein and water. Added water and added fiber / hydrocarbons were evaluated by calculations. The main results of the survey are that other types of meat were not mixed with ground beef and soy protein was not detected. According to calculations, water was added in 6 samples out of 8, but for one of the six samples, water was not in the description of ingredients. The packaging of two samples was marked with 12% added water, but the calculations did not indicate much added water. According to the ingredient descriptions, potato fiber is increased to 4 products out of 8. The fibers bind water, but the use of such substances is permitted according to regulations. A comparison with nutrition labeling revealed that fat was above the stated value in three cases and protein was below the marked value in two cases. In some cases, the labeling on the packaging did not meet the requirements of the regulations. Nutrition labeling was missing for two samples. There was a lack of adequate address and subtitle markings. It can be concluded that there is a need to improve the labeling of beef mince packaging. Regulation on meat and meat products no. 331/2005 is unclear on issues such as added water and therefore there is every reason to review the regulation.

A survey on the composition and labeling of minced beef was carried out in January 2010. Eight products of prepacked minced beef were sampled from supermarkets in Reykjavik. The labels were compared to provisions in regulations. The products were analyzed for meat species soy protein, fat, protein, ash and water. Added water and added carbohydrates / fiber were calculated from analytical values. The main results of the survey were that other meat species were not added to the minced beef and soy protein was not detected. According to calculations, water was added to 6 out of 8 samples but for one of the samples water was not listed as an ingredient. In two products added water was less than the 12 percent stated on the label. Potato fibers were according to the labels added to 4 products. This is in accordance with regulations. Fat percentage was higher than declared in three products and protein was less than declared in two products. Labeling did not fulfill regulatory requirements in some cases. Nutrient labeling was lacking in 2 samples. Addresses of producers and subtext in the name of the products were sometimes missing. The Icelandic regulation on meat and meat products No. 331/2005 is unclear on how to estimate and calculate added water and needs to be revised.

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