When Salmonella enterica is not in a planktonic state, it persists
in organised communities encased in extracellular polymeric
substances (EPS), defined as biofilms. Environmental
conditions ultimately dictate the key properties of the biofilms
such as porosity, density, water content, charge, sorption
and ion exchange properties, hydrophobicity and mechanical
stability. S. enterica has been extensively studied
due to its ability to infect the gastrointestinal environment.
However, only during the last decades studies on its persistence
and replication in soil, plant and abiotic surfaces have
been proposed. S. enterica is an environmental bacterium
able to effectively persist outside the human host. It does so
by using EPS as tools to cope with environmental fluctuations.
We therefore address this mini-review to classify those
EPS that are produced by Salmonella with focus on the environment
(plant, soil, and abiotic surfaces) by using a classification
of EPS proposed by Flemming and collaborators
in 2007. The EPS are therefore classified as structural, sorptive,
surface-active, active, and informative.