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Pig Journal Volume: 46
Publication date: November 2000

Proceedings Section

PORCINE MULTISYSTEMIC WASTING SYNDROME: COMPARISONS WITH BLUE WING DISEASE
W.A. Nash

Abstract
The cause of Porcine Multisystemic Wasting Disease (PMWS) is porcine circovirus type 2. The behaviour of a circovirus of chickens which causes chick anaemia virus disease (and blue wing ) is discussed.
Both viruses are immunosuppressive, resistant in the environment and thought to be enhanced by the presence of pre- or co-infections with other viruses and bacteria.
Three cases of PMWS in Great Britain confirmed by finding PCV2 in tissues are described.
The finding of virus only in herds with typical clinical signs suggests that the cause is PCV2.
Chick anaemia virus may give an insight into disease mechanisms in pigs and an indication as to how PMWS can be controlled.

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