Salmonella spp. is an important zoonotic pathogen that can spread along the production chain of swines. The objective was to evaluate the incidence of Salmonella spp. in feces of swines in termination phase in the farm, in the pre-slaughter and environmental samples, identify the serotypes and establish a phylogenetic relationship among the isolates. Three collections were done in different batches of pigs housed in the termination pen and in the same animals after transport to the slaughterhouse totaling 90 plots and 9 environmental samples. The transport does not influenced the percentage of isolation of the microorganism (p>0.05). Of the total of 99 samples, 50 (50.5%) were identified as Salmonella spp., and was identified a variety of serovars: Agona (30%), Typhimurium (26%), Minnesota (24%), Infantis (18%) and Panama (2%). Dendrograms showed homology among isolates of different serovars grouped into clusters. The similarity was independent of the local of isolation, indicating the presence of several clones. The main sources of infection were cross-contamination between animals and environment and the consumption of contaminated feed. The diversity of strains and homology among the isolates indicates a common origin, demonstrating a need for monitoring of zoonotic bacterias and the deployment of more effective control measures for Salmonella spp. in swines.
Salmonellosis; serotyping; RAPD
