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Table 2 Quantitative detection and proportions of samples with detectable quinolone non-susceptible Escherichia coli (QNSE)

From: Occurrence of Escherichia coli non-susceptible to quinolones in faecal samples from fluoroquinolone-treated, contact and control pigs of different ages from 24 Swiss pig farms

 

Groups

 

G1

G2

G3

G4

G5

TOTAL

FARU

2w p.p.

94.4% (17/18), p

100.0% (18/18), p

92.5% (37/40)

92.5% (37/40)

 

94.0% (109/116)

CI = 76.8–99.4%

CI = 87.1–100.0%

CI = 81.3–97.9%

CI = 81.3–97.9%

 

CI = 88.5–97.3%

x0 = 1

x0 = 0

x0 = 3

x0 = 3

 

x0 = 7

ø = 7.0

ø = 6.7

ø = 7.1

ø = 5.8

 

ø = 6.9

m = 6.6

m = 5.8

m = 5.6

m = 4.6

 

m = 5.7

4w p.p.

94.1% (16/17), p

91.7% (11/12), p

72.5% (29/40)

91.4% (32/35)

 

84.6% (88/104)

CI = 75.6–99.4%

CI = 67.1–99.1%

CI = 57.4–84.5%

CI = 78.8–97.6%

 

CI = 76.7–90.6%

x0 = 1

x0 = 1

x0 = 11

x0 = 3

 

x0 = 16

ø = 6.4

ø = 6.4

ø = 5.4

ø = 5.1

 

ø = 5.9

m = 5.1

m = 6.3

m = 3.8

m = 3.8

 

m = 4.3

RU

13.3% (6/45)

15.4% (6/39)

10.8% (4/37)

2.5% (1/40)

11.1% (5/45)

10.7% (22/206)

CI = 5.7–25.5%

CI = 6.6–29.0%

CI = 3.7–23.7%

CI = 0.2–11.1%

CI = 4.3–22.7%

CI = 7.0–15.5%

x0 = 39

x0 = 33

x0 = 33

x0 = 39

x0 = 40

x0 = 184

ø = 2.3

ø = 3.1

ø = 1.0

ø = 3.4

ø = 1.7

ø = 2.9

m = 0.0

m = 0.0

m = 0.0

m = 0.0

m = 0.0

m = 0.0

FU

23.8% (10/42)

14.3% (6/42)

29.6% (8/27)

25.0% (9/39)

4.4% (2/45)

15.6% (35/195)

CI = 12.9–38.2%

CI = 6.1–27.1%

CI = 15.1–48.3%

CI = 12.0–38.0%

CI = 0.9–13.6%

CI = 13.0–23.8%

x0 = 32

x0 = 36

x0 = 19

x0 = 30

x0 = 43

x0 = 160

ø = 2.9

ø = 2.3

ø = 2.2

ø = 2.1

ø = 1.9

ø = 2.5

m = 0.0

m = 0.0

m = 0.0

m = 0.0

m = 0.0

m = 0.0

TOTAL

40.2% (49/122)

36.9% (41/111)

54.2% (78/144)

51.3% (79/154)

7.8% (7/90)

40.9% (254/621)

CI = 31.7–49.1%

CI = 28.3–46.2%

CI = 46.0–62.2%

CI = 43.4–59.2%

CI = 3.5–14.7%

CI = 37.0–44.9%

x0 = 73

x0 = 70

x0 = 66

x0 = 75

x0 = 83

x0 = 367

ø = 6.3

ø = 6.1

ø = 6.6

ø = 5.3

ø = 1.8

ø = 6.2

m = 0.0

m = 0.0

m = 100.0

m = 100.0

m = 0.0

m = 0.0

  1. Proportions of samples with QNSE and corresponding 95% confidence intervals (CI), x0 = number of samples with zero quinolone non-susceptible E. coli detected, mean (= ø) and median (= m) log colony forming unit per gram faeces (log CFU/g) of quinolone non-susceptible E.coli in faecal samples from pigs of different age and group, median = 0.0 were expressed in colony forming unit per gram faeces (CFU/g), FARU farrowing unit, 2/4w p.p. two and four weeks postpartum, RU rearing unit, FU fattening unit, p pooled samples