Evolution of body weight in pigs receiving colistin sulfate (CS)
orally at a dose of 50 000 IU/kg (mean ± standard deviation [SD]). Challenge was performed at d-2 and treatment with colistin sulfate (CS) at the dose of 50 000 IU/kg. For each sampling time, means with different letters on a given day are statistically different. At d-3 and d-6 there was no significant difference between groups.