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Table 2 Median time to first, second and third treatment stratified by time periods associated with change in antimicrobial use policy

From: Antimicrobial use policy change in pre-weaned dairy calves and its impact on antimicrobial resistance in commensal Escherichia coli: a cross sectional and ecological study

Period

Treatment

Median

Interquartile range

Predominant drugs used

Pre-policy change

 

First

9 days

6–12 days

Enro/Pen/Sul combination

Second

17 days

13–22 days

Amp/Sul combination

Third

25 days

20–36 days

Amp/Sul/Mac combination

Policy change

 

First

8 days

7–9 days

Sul

Second

14 days

12–19 days

Amp/Sul combination

Third

32 days

21–48 days

Enro/Sul or Nuf/Sul combination

Post change

 

First

8 days

6–10 days

Sul, Sul/Spc combination

Second

13 days

11–16 days

Amp/Sul combination

Third

21 days

16–31 days

Enro/Sul or Amp/Sul combination

  1. Enro: enrofloxacin; Pen: penicillin; Sul: sulfonamide; Mac: macrolide; Spc: spectinomycin; Nuf: florfenicol