Following on from the comments in the previous Quarterly Surveillance Report, VLA Bury St Edmunds reported that several practitioners in their region had noted a marked increase in PMWS (increased wasting and mortality) in growing pigs on units where mortality had previously been controlled by the 20-point Madec Plan.

PMWS was confirmed on the basis of gross lesions, histopathological changes, and IHC for PCV-2 in a 4-month-old purebred farmed wildboar. The pig came from a 110-sow commercial outdoor unit with a problem of illthrift in piglets from around three months of age – weaning age is variable from three to five months of age.

PMWS was confirmed in two 9-week-old pigs, which were anaemic, wasting, and scouring, and had developed pendulous abdomens. PMWS had previously been diagnosed on the unit where it presented as respiratory disease.

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Source: Veterinary Laboratories Agency - August 2003