Diverse and atypical genotypes identified in Toxoplasma gondii from dogs in São Paulo, Brazil - Dubey, J. P; Gennari, Solange Maria; Sundar, N; Vianna, M. C. B; Bandini, L. M; Yai, Lucia Eiko Oishi; Kwok, O. C. H; Su, C (Journal Parasitology, 2007)