Norway – Microbiological control of pasteurised and unpasteurised dairy products, 2018

Mattilsynet

The microbiological quality was generally good for the 189 dairy products on the Norwegian market that the Norwegian Food Safety Authority examined in 2018. Nevertheless, we see that there are microbiological challenges in connection with unpasteurised dairy products.

What did we investigate? 189 samples of unpasteurised and pasteurised cheeses and other dairy products produced in Norway and in the EU.
Period: 2018
What were we looking for?

The four categories have been analysed for various disease-causing bacteria (pathogens). These choices are made in order to get the most information for each category.

The different categories are:

PN = pasteurised milk product produced in Norway.

P EU = pasteurised milk product produced outside Norway.

UN = unpasteurised milk product produced in Norway.

U EU = unpasteurised milk product produced outside Norway.
 

The various disease-causing infectious agents we analysed for:

Listeria monocytogenes (pathogen): PN, P EU, UN, U EU, number 189 pcs.

Shigatoxin-producing Escherichia coli (STEC) (pathogen): UN, U EU, number 96 pcs.

E. coli (hygiene parameter): PN, UN, U EU, 169 st.

S. aureus (hygiene parameter): UN, number 71 st.

Toxins (enterotoxin) from S. aureus (pathogen): UN, U EU, number 96 pcs.

Salmonella (pathogen): U EU, number 25 st.

What did we find?

Listeria monocytogenes : No detection in 189 samples of dairy product.

Shigatoxin-producing Escherichia coli (STEC):
One finding in French red cow cheese of cow’s milk ( E. coli O-, stx2 and eae ). A total of 25 unpasteurised milk products produced outside Norway were examined. No findings in 71 unpasteurised milk products from Norway.

Escherichia coli (hygiene parameter):
In 73 pasteurised milk products from Norway, there was a detection and this was above the lower limit value (100 cfu / g) but below the upper limit value (1,000 cfu / g). No E. coli was detected above the detection limit of 10 colony forming units / g sample (cfu / g) in the other samples.

In 61 of the 71 unpasteurised milk products produced in Norway, E. coli was not detected above the detection limit of 10 colony-forming units / g sample (cfu / g). 3 st. (4.2%) was above 100 cfu / g.

In unpasteurised dairy products from the EU (25), 5 (20%) of the products had more than 100 cfu/ g E. coli. There is no microbiological criterion for E. coli in the regulations for unpasteurised cheeses.

Staphylococcus aureus:
Of 71 samples, none exceeded the regulatory limit of 10,000 cfu/ g.

Of the 96 unpasteurised dairy products examined, the enterotoxins AE Toxins (enterotoxins), which some S. aureus can produce , were not detected .

Salmonella was not detected in the 25 samples of unpasteurised milk products produced outside Norway.

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