**4. Conclusion**

The laboratory findings suggest that fallowing, applied for a period of 149 days to poultry facilities and equipment on a farm with a history of previous isolation of *Salmonella* Gallinarum in a previously housed flock, was not effective until the time of collection of environmental swabs. In this way, it becomes necessary to carry out new cleaning and disinfection procedures, as well as new monitoring through bacteriological exams, or even to extend the fallow period until the complete elimination of the pathogen from the environment. It was also concluded that the epidemiological inquiry is a valuable tool and should be adopted to investigate the epidemiological relations between the triad formed by *Salmonella* spp., the environment, and the host and is also useful to support complementary exams, such as isolation in bacterial cultures. Furthermore, it is possible to infer that longitudinal bacteriological studies of the environment are extremely important tools for the use of epidemiology in poultry production.
