A lympho-follicular microenvironment is required for pathological prion protein deposition in chronically inflamed tissues from scrapie-affected sheep. oleh Caterina Maestrale, Giovanni Di Guardo, Maria Giovanna Cancedda, Giuseppe Marruchella, Mariangela Masia, Stefania Sechi, Simonetta Macciocu, Cinzia Santucciu, Mara Petruzzi, Ciriaco Ligios