Survival of fitness reduced bacteria.

The fraction of pigs that has survival of the strain () (y-axes) with a percentage reduction in growth rate compared to the mean growth rate (x-axes). The colors indicate the extinction cut off, , under which bacteria risk extermination from the pig: pink = , blue = , black = , where is the carrying capacity of the system (). This is modeled for nine parameter sets of (excretion rate) and (uptake fraction from the environment). For example, for , at all three cut off values, , the (resistant) strains are only extinct when the fitness cost is approximately 40%. (, ).