Assessment of different surveillance systems for avian influenza in commercial poultry in Catalonia (North-Eastern Spain).
Alba
A
A
Centre de Recerca en Sanitat Animal (CReSA), UAB-IRTA, Campus de la Universitat Autònoma de Barcelona. 08193 Bellaterra, Barcelona, Spain. ana.alba@cresa.uab.es
Casal
J
J
Napp
S
S
Martin
P A J
PA