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Annette Seraina Riklin, 2015

Vetsuisse-Fakultät Universität Zürich, Departement fr Nutztiere

Contact: msimonyi@vetclinics.uzh.ch

Piglets from 101 randomly selected transports of fattening pigs (10696 pigs) from breeding to fattening farm were followed up during the whole fattening period. For each fattening farm, the animal treatment index (ATI) and risk factors for a frequent use of antimicrobials were calculated. During the fattening period pigs were treated on average for 4.8 days. On 35 fattening farms all pigs received oral prophylactic treatment (PoGT) at the beginning of the fattening period. The major proportion of the ATI was due to PoGT with 79% of treatments, followed by therapeutic peroral (18%) and therapeutic parenteral use of antibiotics (3%). PoGT neither led to fewer individual or group treatments, nor to a better weight gain. There was even a trend of a higher mortality rate during the first two weeks of the fattening period in farms which used PoGT. Sulfonamide/trimethoprim combinations were the most used oral antimicrobials followed by tetracycline/sulfonamide/macrolide triplet combination. Main risk factors for a frequent use of antimicrobials were poor biosecurity, dry or fluid feeding instead of mash feeding and inadequate water supply. Main reasons for a PoGT were fear of diseases, economic loss and habit. Considering the high amount of prophylactic antimicrobial use there is a great potential for reducing antimicrobial usage in Switzerland.

use of antimicrobials, fattening farm, animal treatment index

Deutsche Version