Seroprevalence and risk factors associated with ovine toxoplasmosis in Northeast Brazil Milena M. Clementino Andrade, Mariangela Carneiro, Andrea D. Medeiros, Valter Andrade Neto and Ricardo W.A. Vitor Parasite, 20 (2013) 20 Published online: 28 May 2013 DOI: 10.1051/parasite/2013019