Table 1.

Summary of (non-dimensionalized) parameters in the model.

model parameters
symbol	description	value	unit
r	growth rate of the bacterial populations	1	day−1
μb	death rate of Bifidobacteria	50	day−1
μc	death rate of commensal competitor	200	day−1
αc	effect of cross-feeding between B1 and B2	1.7	—
α	competitive effect between bacterial populations	2	—
fz	supply of B1 associated with milk	0.01	day−1
f2	supply of B2 from the environment	0.03	day−1
f3	supply of B3 from the environment	0.05	day−1
ω	rate of weaning	0.014	day−1
h	day since birth when milk is half of diet	500	day
γ	immune effect	0.0001	—