Table 5 Ampicillin resistance
Resistant isolates | Susceptible isolates | One-factorial log. Reg. | Multi-factorial log. Reg. | ||||||
|---|---|---|---|---|---|---|---|---|---|
n | % | n | % | OR | p | OR | p | ||
Time period | 2006–2011 (Ref.) | 1345 | 74.64 | 457 | 25.36 | 1 | – | 1 | – |
2012–2017 | 919 | 73.80 | 325 | 26.13 | 0.96 | 0.634 | 0.64 | 0.014 | |
Age-group | Sow (Ref.) | 24 | 63.16 | 14 | 36.84 | 1 | – | 1 | – |
Piglet | 102 | 72.86 | 38 | 27.14 | 1.57 | 0.246 | 2.46 | 0.173 | |
Nursery | 578 | 79.5 | 149 | 20.5 | 2.26 | 0.019 | 3.71 | 0.045 | |
Fattening | 33 | 66.0 | 17 | 34.0 | 1.13 | 0.782 | 1.76 | 0.414 | |
Sampling site | GIT (Ref.) | 1887 | 76.49 | 580 | 23.51 | 1 | – | 1 | – |
GUT | 188 | 56.29 | 146 | 43.71 | 0.40 | < 0.0001 | 1.98 | 0.332 | |
others | 189 | 77.14 | 56 | 22.86 | 1.04 | 0.818 | 1.19 | 0.527 | |