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Pig Journal Volume: 48
Publication date: December 2001

General Section

THE ROLE OF MYCOTOXINS IN PMWS FACT OR FICTION
by D.G.S. Burch and C. Rowsell

Abstract
It has been postulated that mycotoxins may play a role in the development of porcine circovirus type 2 (PMWS), as the main infectious agent associated with the disease, was found well before the disease syndrome started, while the development of the syndrome coincided with a number of wet harvests in the UK. There was an increase in the incidence of fusarium ear blight at this time. However, a representative survey (320 samples) of grain production in the UK taken in early 2000 showed that the incidence of deoxynivalenol was high (88%), although all samples were below the acceptable target level for grains of 750ppb. The detectable incidence of ochratoxin A was lower at 16%; but 3.4% of samples were over the acceptable limit of 5ppb. The pattern of detection across the country did not correlate with the disproportionate reported incidence of the disease of 88% of cases in East Anglia and zero in Scotland, where the incidence of ochratoxin A was the highest. It is considered that other factors, possibly husbandry practices in East Anglia, may be of more significance in the development of the disease syndrome

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