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Volume 13, Number 4—April 2007

Dispatch

Antimicrobial Drug Resistance of Salmonella Isolates from Meat and Humans, Denmark

Marianne N. Skov*, Jens Strodl Andersen†, Søren Aabo†, Steen Ethelberg‡, Frank M. Aarestrup†Comments to Author , Anders Hay Sørensen†, Gitte Sørensen†, Karl Pedersen†, Steen Nordentoft†, Katharina E.P. Olsen‡, Peter Gerner-Smidt‡, and Dorte L. Baggesen†
Author affiliations: *University of Southern Denmark, Odense, Denmark; †Danish Institute for Food and Veterinary Research, Copenhagen, Denmark; ‡Statens Serum Institut, Copenhagen, Denmark;

Main Article

Table 2

Results from the reduced logistic regression models*

Variable
OR (95% CI)
Estimate (95% CI)
SE (Est.)
p value
Resistance vs. nonresistance
Intercept
0.164 (0.129 to 0.207)
–1.81 (–2.05 to –1.57)
0.121

Origin
5.08 (4.19 to 6.18)
1.62 (1.43 to 1.82)
0.0988
<0.00001
Year
1.27 (1.19 to 1.35)
0.235 (0.174 to 0.297)
0.0313
<0.00001
Cattle vs. poultry
0.400 (0.230 to 0.662)
–0.917 (–1.47 to –0.413)
0.268
<0.00001
Pork vs poultry
1.26 (1.06 to 1.51)
0.233 (0.0553 to 0.414)
0.0916
Multidrug resistance vs. resistance
Intercept μ
0.141 (0.0976 to 0.201)
–1.96 (–2.33 to –1.60)
0.185

Origin
4.98 (3.87 to 6.44)
1.61 (1.35 to 1.86)
0.129
<0.00001
Year
1.14 (1.03 to 1.27)
0.133 (0.0259 to 0.240)
0.0547
0.0148
Nalidixic acid resistance vs. non–nalidixic acid resistance
Intercept
0.0611 (0.0333 to 0.107)
–2.80 (–3.40 to –2.24)
0.296

Origin
6.54 (3.45 to 12.8)
1.88 (1.24 to 2.55)
0.334

Year
1.41 (1.18 to 1.69)
0.342 (0.167 to 0.526)
0.0914

Origin and year
0.732 (0.587 to 0.909)
–0.311 (–0.532 to –0.0956)
0.111
0.00448
Cattle vs. poultry
0.0404 (0.00229 to 0.182)
–3.21 (–6.08 to –1.70)
1.01
<0.00001
Pork vs. poultry 0.0668 (0.0425 to 0.101) –2.71 (–3.16 to –2.29) 0.220

*OR, odds ratio; CI, confidence interval; SE, standard error; Est., estimated.

Main Article

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