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(a) Distribution of the total commensal E. coli per mL of faecal mass in the large intestine of a dairy cow treated for 5 days with a once per day injection of a non-sustained-release preparation of the antimicrobial, for the all-parameter environmental noise model formulation. Concurrent distributions of (b) the number and (c) the fraction of resistant cells among the surviving E. coli. (d)–(f) Similar distributions for the demographic noise model formulation.
