Hairy wasting pigs. In some herds there are no symptoms. An acute extensive consolidating pneumonia. Formation of multiple abscesses. Disease becomes evident within 1-3 weeks of weaning.
Pigs lose condition.
Diarrhoea may be seen. Discharges from the eyes. Increased respiratory rates. Periods of inappetence. Pigs become infected as maternal antibody disappears and then remain viraemic for 3 to 4 weeks continually excreting virus.