Introduction. In Colombia, poultry farming is one of the fastest growing industries in recent years, which leads to an increase in threats in the productive system such as infectious diseases, economic losses due to mortality, among others. Salmonella is a zoonotic agent that causes foodborne diseases, which annually affects tens of millions of people around the world, being of great impact at the level of public health, animal health and economic sector. Methodology. The present work was proposed with the aim of identifying the factors associated to the prevalence of Salmonella spp in a poultry slaughterhouse of Bogotá D. C. , through an analytical prevalence study. Information was collected and samples were taken corresponding to 878 birds distributed in the stages of reception, evisceration and chiller output of the slaughter process, which were processed by real-time PCR for the determination of Salmonella spp. A univariate, bivariate and multivariate analysis was carried out. Results. The prevalence of Salmonella spp in reception was 37, 84%, in evisceration 89, 19% and in the exit of chiller output 72, 46%. The factors that best explain the prevalence of Salmonella spp in reception were density of birds in the farm (PR 1, 9 (CI 1, 3-2, 6)) and use of reused litter (PR 1, 6 (CI 1, 01-2, 25)); for the exit of chiller output were day of the week and number of hours since the beginning of the process (PR 1, 6 (CI 1, 34-1, 7)). Discussion. The increase in the prevalence of Salmonella spp in evisceration indicates contamination during the process. The decrease in prevalence at the exit of the chiller suggests an efficiency in the elimination of the bacteria by disinfection processes. During the last days of the week and the last hours of the process, there is a greater burden of the bacteria in the process.
