Estatística espacial de varredura na detecção de áreas de risco para a cisticercose bovina no estado da Bahia (Spatial scan statistic in the detection of risk areas for bovine cysticercosis in the state of Bahia)

ABSTRACT In order to identify the spatial geographical distribution of the infected animals and measure the areas under risk of contracting bovine cysticercosis, spatial scan analysis was used to identify clusters of positive bovine for Cysticercus bovis recorded in the period from 2006 to 2007, from six slaughterhouses under the Federal Inspection Service. The number of slaughtered cattle was 825,951, of which (0.7%) 5,395 were diagnosed as positive for the disease, through post-mortem inspection. The spatial scan analysis through the likelihood ratio showed the spatial distribution of bovine cysticercosis concentrated in defined a geographic area less likely to have occurred by chance, with an estimated risk of 13.6. This specific area encompasses 101 municipalities that belong to Itapetinga, Litoral Sul, Medio Rio de Contas, Vitoria da Conquista and Extremo Sul Territories of Identification in Bahia State. Keywords: bovine cysticercosis, spatial analyst, geographical distribution