“…Using a different methodology than that adopted in the present study, Baptista, Haddad, Almeida and Nardi (2012) reported prevalence of infected herds and animals of 43.5% and 6.2%, respectively, for the Araguaína region in 2010. the Collaborating Center on Animal Health of FMVZ-USP, Tocantins exhibited the same seropositive herds prevalence as Paraíba, Pernambuco, Espírito Santo, Rio Grande do Sul, Bahia, Federal District, and Paraná; a lower seropositive herds prevalence than Mato Grosso do Sul, Mato Grosso, Rondônia, São Paulo, Goiás, Rio de Janeiro, Sergipe, and Maranhão; and a higher seropositive herds prevalence than Santa Catarina and Minas Gerais (Almeida et al, 2016;Alves et al, 2009;Anzai et al, 2016;Barddal et al, 2016;Baumgarten et al, 2016;Borba et al, 2013;Clementino et al, 2016;Gonçalves et al, 2009ab;Inlamea et al, 2016;Klein-Gunnewiek et al, 2009;Leal et al, 2016;Ogata et al, 2009;Oliveira et al, 2016;Rocha et al, 2009; V. G. S. O. Silva et al, 2009; N. S. Silva et al, 2016). MAPA recently instituted a matrix to compare federal units regarding actions to combat bovine brucellosis, in which the prevalence of seropositive herds is an important element (MAPA, 2017).…”