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Table 3 Events in the national screening and eradication program for Mycoplasma hyopneumoniae (Mhyo in the Norwegian pig population

From: Successful eradication of Mycoplasma hyopneumoniae from the Norwegian pig population – 10 years later

Year Important events
1992 Initial eradication attempts successfully performed in four farrow-to-finnish herds
1994–1997 Screening and eradication of Mhyo in nucleus and multiplier herds
1997 The farmer-owned abattoirs initiate a project for trading high-health feeder piglets.
1998 All nucleus and multiplier herds free from Mhyo by the end of the year.
Regional eradication of Mhyo in commercial herds is initiated in counties with low herd prevalence of Mhyo (Vestfold, Telemark, Buskerud and Trøndelag).
1999 A premium of 14% is introduced for high-health feeder piglets documented free from Mhyo, toxinproducing Pasteurella multocida, Sarcoptes scabiei and Brachyspira hyodysenteriae in both private end farmer-owned abbatoirs.
2000 National eradication program with the aim of freedom from Mhyo in the entire pig population by the end of 2005 is decided.
2001 Action plan with the aim of known Mhyo status in all sow herds before the end of 2002 is decided.
2002 Mycoplasma project Rogaland is initiated.
2004 All herds in 9 of 18 counties free from Mhyo (Table 1)
Large multiplier herd in Rogaland reinfected.
2006 A deduction of 100 NOK per finisher pig slaughtered from herds not yet declared free from Mhyo is implemented by all abattoirs.
All sow herds tested free from Mhyo by the end of the year.
2007 Retesting of all sow herds in Rogaland county.
October: New reinfection in the multiplier herd in Rogaland including five contact herds.
2008 Retesting of all pig herds in Rogaland.
April: A sow pool system tested positive, eradication performed by total depopulation and repopulated with pigs from herds documented free from Mhyo
2009 First year without any Mhyo positive samples
National surveillance program for Mhyo is initiated
  1. Legend: Important events in the development, implementation and the final success of a national screening and eradication program for Mycoplasma hyopneumoniae (Mhyo) in the Norwegian pig population