The Norwegian Food Safety Authority (FSA) has discovered antibiotic resistant E. coli bacteria in turkey fillets on the Norwegian market, the Norwegian news agency NTB reported on Tuesday.

The FSA deputy supervisory director, Ole Fjetland, said that the situation is “worrisome” as they had no knowledge on how these bacteria have entered the poultry production in Norway.

The FSA has found the E. coli bacteria in about half of the turkey fillets they tested for monitoring antibiotic resistance.

The FSA has followed the bacteria since 2000 and the new technology they adopted gives results showing that the incidence is much higher than previously thought.