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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