Table 2

AMU of 291 Swiss pig farms during 2016 and 2017 measured as the number of DCDch (nDCDch) and difference between both years (△), displayed by age category and AS. All farms were participants of the Suissano Health Programme

Antimicrobial classSuckling pigletsWeaned pigletsFattening pigsSowsAll age categories
2016201720162017201620172016201720162017
Aminoglycosides*13,937 (3%)7832 (3%)−61054407
(3%)
2204
(2%)
−22033077
(5%)
1726
(3%)
−13511449 (10%)736
(5%)
−71322,870 (4%)12,498
(3%)
−10,372
Amphenicoles*01750+1750000040+402377+54231867+1844
Cephalosporins*80921−7883819−195840−186732−35972112−860
Fluoroquinolones*33,389 (8%)11,498 (4%)−21,8916815
(5%)
3153
(3%)
−3662180446+266725
(5%)
313
(2%)
−41241,109 (6%)15,410
(3%)
−25,699
Lincosamides*22882148−1402648+2211032−123182199−119
Macrolides*4330−43312,863
(10%)
7373
(6%)
−54901831
(3%)
885
(2%)
−9464783+3615,174 (2%)8342
(2%)
−6833
Penicillins*360,950 (85%)273,701 (88%)−87,24951,264
(38%)
59,287
(51%)
+802345,240
(70%)
39,707
(81%)
−553310,672 (72%)13,597
(77%)
+2925468,126 (74%)386,292 (79%)−81,834
Pleuromutilins330−3311111+10055010+150116+66
Polypeptides*17012816+111525,143
(19%)
18,751
(16%)
−6392568320−24800027,412 (4%)21,887
(4%)
−5525
Pyrimidines*12842764+148016701787+1172530
(4%)
759
(2%)
−1771807
(5%)
1295
(7%)
+48862916605
(1%)
+314
Sulfonamides*20344014+198015,105 (11%)9975
(9%)
−51306290
(10%)
2084
(4%)
−4206866
(6%)
1304
(7%)
+43824,295 (4%)17,377
(4%)
−6918
Tetracyclines*61283116−301216,674 (12%)12,878
(11%)
−37964867
(8%)
3108
(6%)
−1759134
(1%)
107
(1%)
−2727,803 (4%)19,209
(4%)
−8594
Total†422,986 (66%)309,660 (63%)−113,326134,016 (21%)115,586 (24%)−18,43064,647 (10%)49,121 (10%)−15,52614,794 (2%)17,546
(4%)
2752636,443491,913−144,530
  • *Percentage of total usage of the respective age category in parenthesis. Proportions are only displayed when 2% or more.

  • †Percentage of total usage of all age categories in parenthesis.

  • AMU, antimicrobial usage; AS, active substance.