Biological and genetic characterisation of Toxoplasma gondii isolates from chickens (Gallus domesticus) from São Paulo, Brazil: unexpected findings - Dubey, J. P.; Graham, D. H.; Blackston, C. R.; Lehmann, T.; Gennari, Solange Maria; Ragozo, Alessandra Mara Alves; Nishi, Sandra Mayumi; Shen, S. K.; Kwork, O. C. H.; Hill, D. E.; Thulliez, P. (International Journal for Parasitology, 2002)