Viral infections in swine

The viral diseases AD, TGE, PRCV, PRRS and PED have never been detected in Norway. During 2009, the Norwegian pig population has several introductions of pandemic influenza A(H1N1)pdm09 virus, and since then specific antibodies against this virus has been detected in samples from approx. 50 % of the pig herds tested.

The aim of the surveillance programme is documentation of population freedom from Aujeszky’s disease (AD), transmissible gastroenteritis (TGE), porcine respiratory coronavirus (PRCV), porcine reproductive and respiratory syndrome (PRRS), porcine epidemic diarrhea (PED) and swine influenza viruses (SIVs) (except A(H1N1)pdm09 – where seroprevalence is documented).


The surveillance programme for specific viral infections in swine herds in 2022 continued to show Norway to be free from Aujeszky’s disease, transmissible gastroenteritis, porcine epidemic diarrhoea and porcine respiratory and reproductive syndrome.

Since 2009, influenza A (H1N1) pdm09 virus (H1N1pdm) has been endemic in the Norwegian swine population, showing a decline in seroprevalence to approx. 12% of herds testing positive during the last year. Other swine-associated influenza strains have never been diagnosed in Norway.

In 2018, porcine respiratory corona virus (PRCV) was detected for the first time in Norway, and the seroprevalence in the southwestern part of the country has since been high and also increasing in other parts of Norway.

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