Publikationsdatenbank

KAbMon:
monitoring antibiotic usage in different groups of calf-keeping farms (2022)

Art

Vortrag

Autoren

Jensen, K. C. (WE 16)

Weise, S. (WE 16)

Gorisek, L. (WE 16)

Baer, J. (WE 10)

Friese, A. (WE 10)

Robé, C. (WE 10)

Rösler, U. (WE 10)

Stock, A. (WE 18)

Müller, K. E. (WE 18)

Merle, R. (WE 16)

Kongress

AACTING : herd level antimicrobial consumption in animals : colllect / analyse / benchmark / communicate

Hannover, 05. – 06.05.2022

Quelle

AACTING : quantification, benchmarking and stewardship of veterinary antimicrobial usage : third international conference : 5-6 May 2022 Hannover, Germany & online : abstracts book — Department of Biometry, Epidemiology and Information Processing, WHO Collaborating Centre for Research and Training for Health at the Human-Animal-Environment Interface, University of Veterinary Medicine Hannover (Hrsg.)

Hannover, 2022 — S. 26

Sprache

Englisch

Verweise

URL (Volltext): https://aacting.org/swfiles/files/download.php?myfile=AACTING_2022_Abstracts_book_2022-05-03.pdf

Kontakt

Institut für Tier- und Umwelthygiene

Robert-von-Ostertag-Str. 7-13
14169 Berlin
+49 30 838 51845
tierhygiene@vetmed.fu-berlin.de

Abstract / Zusammenfassung

Introduction:
In Germany, a national monitoring system for antimicrobial usage in farm animals kept for meat production is in place. An evaluation demonstrated a broad spectrum of production systems in the group of cattle up to 8 months of age that did not allow for comparisons of the amounts of antimicrobials used per farm. To this end, one aim of the project KAbMon was to develop a categorization scheme. In addition, aims of the study were to determine associations between management factors and the treatment frequencies as well as the occurrence of antimicrobial resistances.

Material and methods:
A categorization scheme was established on basis of expert opinion: Group A farms keep calves from birth on (suckler cows or dairy farms). Group B farms purchase calves up to the age of 10 weeks while farms in Group C purchase older calves. Subsequently, farms (n=107) were visited for evaluation of the housing system and to collect faecal samples as well as data on treatment frequency and farm management. Isolates of E. coli (n=1923) were tested for phenotypical resistance to fourteen antibiotics.

Results:
From 2018 to 2020, treatment frequencies did not vary substantially. Treatment frequencies of the groups B and C were adjusted for the time period the calves remained on the farm. Despite the adjustment, treatment frequencies were higher in group B compared to group A and C. Multifactorial
regression modelling revealed that the adjusted treatment frequency was stronger associated with structural management factors (group and number of origins of purchased calves) than with factors concerning housing or health management: If a farm purchased calves from ten times more origins, the
treatment frequency raised by 0.97 (SE: 0.48). The higher the treatment frequency was, the more frequently antimicrobial resistance patterns were observed in the E. coli isolates (half-year 1/2018:adj. R-Square=0.023, p < 0.05).

Conclusion:
Experts´ opinions led to a categorization scheme that allows a comparison between farms regarding their antimicrobial usage. Significantly more antibiotic treatments were recorded for farms that purchase calves under the age of ten weeks compared to farms that raise calves from birth onwards or
farms that purchase older calves. Purchasing calves from many different farms was associated with a higher treatment frequency. The association between treatment frequency and resistance score emphasises the need for reduction of antimicrobial usage.