Table 1.

The variable symbols and their meaning. The lumen is abbreviated with L, the mucosa as M. We also indicate each variable with mut or wt to denote to which population they refer. An upper-case I refers to the immune system. SBML [26,27] defines the units item and dimensionless to indicate that a quantity occurs in a piece number or that its unit originates from the cancellation of other units.

Variable Symbol	Meaning	Units
$B_M$	Commensal bacteria in the mucosa	item
$Y_M^{\left(wt\right)}$	wt Yersinia in the mucosa	item
$Y_M^{\left(mut\right)}$	mut Yersinia in the mucosa	item
$B_L$	Commensal bacteria in the lumen	item
$Y_L^{\left(wt\right)}$	wt Yersinia in the lumen	item
$Y_L^{\left(mut\right)}$	mut Yersinia in the lumen	item
I	Strength of immune reaction	dimensionless