To establish a cleaning and disinfection program, it is important to identify the factors that have impact on their efficacy: the type, thickness, and adhesion of dirt and contamination; the temperature, surface quality, contact time, and what chemical- and mechanical power are available to use (Segal, 2011). The first step in any cleaning and disinfection program is a thorough dry cleaning to get rid of loose, easily removable dirt (dust) and contamination (manure).

Salmonella spp. can survive in the environment for several months or even longer. During the rearing period of animals kept in great numbers in a relatively small area, these microorganisms can also replicate themselves exponentially (Dvorak, 2011).

The aim of cleaning and disinfection is to cut the circulating infection chain after depopulation of farms using the “all-in, all-out” principle. Similarly, a well-managed barrier system around the farms should also involve proper cleaning and disinfection steps (vehicles, boots, equipment, tools, humans visiting farm), to prevent the introduction of Salmonella from outside (Böhm 1998).

To choose the right disinfectants in the right concentration one must also consider what kind of efficacy tests they completed according to laboratory norms standardized for farm circumstances (Samberg and Meroz, 1995).