Table 1.

Frequency of extended-spectrum cephalosporin-resistant E. coli carriage among different growing sheds in a pig farm from 2013–2016

Sampling location	Swabs (n)	ESCR E. coli n (%)	95% CI
2013
Farrowing shed	15	13 (86.6)	62.2–96.3
Weaner shed	35	32 (91.4)	77.6–97.0
Grower shed	20	16 (80)	58.4–91.9
Finisher shed	20	17 (85)	63.9–94.8
Total ESCR E. coli	90	78 (86.6)	78.1–92.2
2014
Farrowing shed	60	50 (83.3)	71.8–90.7
Total ESCR E. coli	60	50 (83.3)	71.8–90.7
2015
Farrowing shed	78	25 (32.1)	22.7–43.0
Growers shed	30	6 (20)	9.5–37.3
Finishers shed	32	0(0)	0.0–10.7
Total ESCR E. coli	140	31(22.1)	16.1–29.7
2016
Farrowing shed	80	14 (17.5)	10.7–27.3
Weaner shed	60	0(0)	0.0–6.0
Finisher shed	60	3(5)	1.7–13.7
Total ESCR E. coli	200	17(8.5)	5.4–13.2

ESC^R - ESC-resistant