AWGV - Heres,L.; Elbers,A.R.; van Zijderveld,F.G. - Clinical symptoms reported - and decrease in milk production - of BSE affected cows detected by active surveillance in The Netherlands - International Conference - Prion 2006: Strategies, advances and trends towards protection of society - 3.10.-6.10.2006, Torino, Italy, Lingotto Conference Centre - Poster sessions EPI-05