Photosensitization outbreak caused by pithomyces chartarum (berk & curt) m. B.ellis, in sheep in the state of São Paulo - Gregory, Lilian; Russomano, O; Birgel Júnior, Eduardo Harry; Birgel, D; Pogliani, Fabio Celidonio; Lara, M. C; Della Libera, Alice Maria Melville Paiva; Benesi, Fernando José (World Buiatric Congress, 2004)