TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Krömker, Volker
A1  - Schmenger, Anne
A1  - Klocke, Doris
A1  - Mansion-de Vries, Ellen Maria
A1  - Wente, Nicole
A1  - Zhang, Yangchao
A1  - Leimbach, Stefanie
T1  - Non-inferiority Trial Investigating the Efficacy of Non-steroidal Anti-inflammatory Drugs and Antimicrobial Treatment of Mild to Moderate Clinical Mastitis in Dairy Cows With Long-lasting Udder Diseases
JF  - Frontiers in Veterinary Science
N2  - To reduce ineffective antimicrobial usage in the treatment of non-severe clinical mastitis (CM) in cows with long-lasting udder diseases, non-antibiotic therapy with a non-steroidal anti-inflammatory drug (NSAID) was conducted and evaluated in a non-blinded, positively controlled, non-inferiority trial. Therefore, three-time systemic ketoprofen treatment at intervals of 24 h was evaluated in comparison with the reference treatment of solely antibiotic therapy in a field study on nine free-stall dairy farms located in Northern Germany. Cows with previous CM cases in current lactation and/or with long-lasting high somatic cell counts in preceding dairy herd improvement test days were randomly allocated to one of the two treatment groups in cases of mild to moderate CM. Quarter foremilk samples of the affected quarters were taken for cyto-bacteriological investigation before treatment as well as ~14 and 21 d after termination of therapy. Both treatment groups were compared regarding the bacteriological cure (BC) as the primary outcome. Clinical cure (CC) and no CM relapse within 60 d after the end of treatment (no R60) were chosen as secondary outcomes. The study resulted in the following outcomes: Streptococcus uberis was most frequently identified in microbiological culture from pre-treatment samples, followed by Staphylococcus aureus and Escherichia coli and other coliforms. No significant differences between the NSAID treatment and the reference treatment were detected regarding CC and CM recurrence (no R60). Although the sole ketoprofen therapy resulted in a numerically lower likelihood of BC, there were no significant differences to the reference treatment. Considering the selection criteria in this study, the results indicate that in mild to moderate CM cases exclusive treatment with ketoprofen may constitute an alternative to antimicrobial intramammary therapy, providing an opportunity for reduction of antibiotic usage. However, non-inferiority evaluations were inconclusive. Further investigations with a larger sample size are required to confirm the results and to make a distinct statement on non-inferiority.
KW  - bovine
KW  - mastitis treatment
KW  - NSAID
KW  - chronic
KW  - cure
KW  - reduction of antibiotic usage
KW  - Milchvieh
KW  - Euterentzündung
KW  - Nichtsteroidales Antiphlogistikum
Y1  - 2021
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:960-opus4-19299
SN  - 2297-1769
SS  - 2297-1769
U6  - https://doi.org/10.25968/opus-1929
DO  - https://doi.org/10.25968/opus-1929
N1  - Gefördert mit Mitteln des Publikationsfonds der Bibliothek der Hochschule Hannover.
VL  - 8
ER  -