Randomized clinical trial to evaluate the efficacy of a 5-day ceftiofur hydrochloride intramammary treatment on nonsevere gram-negative clinical mastitis.

Abstract

The objective of this study was to evaluate the efficacy of intramammary treatment with ceftiofur hydrochloride of nonsevere, clinical coliform mastitis. One hundred four cases on 5 farms met the enrollment criteria for the study. Escherichia coli was the most common coliform species identified in milk samples from cows with mild to moderate clinical mastitis, followed by Klebsiella spp. and Enterobacter spp. At enrollment, a milk sample from the affected quarter was taken and used for on-farm culture or submitted to the laboratory. For cows in the treatment group, treatment was initiated with ceftiofur hydrochloride via intramammary infusion at 24-h intervals for 5 d according to label standards. Cows in the control group did not receive treatment. Culture results were available on the day after enrollment and only cows with coliform mastitis continued in the treatment and untreated control groups. Bacteriological cure was defined based on 2 posttreatment milk samples. Molecular typing was used for final definition of bacteriological cure. Treatment of nonsevere clinical gram-negative mastitis with ceftiofur hydrochloride resulted in a significant increase in bacteriological cure compared with nontreated controls in animals infected with E. coli or Klebsiella spp. Treated animals clinically improved significantly more compared with control cows. No significant differences were observed between treated and control animals in milk production or linear score before or after clinical mastitis. Treated animals left the study less frequently compared with control animals.

• Authors: Y H Schukken, G J Bennett, M J Zurakowski, H L Sharkey, B J Rauch, M J Thomas, B Ceglowski, R L Saltman, N Belomestnykh, R N Zadoks
• Journal: Journal of dairy science (J Dairy Sci) Vol. 94 Issue 12 Pg. 6203-15 (Dec 2011) ISSN: 1525-3198 [Electronic] United States
• PMID: 22118109 (Publication Type: Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2011 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.

Chemical References

• Anti-Bacterial Agents
• Cephalosporins
• ceftiofur

Topics

• Animals
• Anti-Bacterial Agents (administration & dosage, therapeutic use)
• Cattle
• Cephalosporins (administration & dosage, therapeutic use)
• Enterobacteriaceae Infections (drug therapy, veterinary)
• Escherichia coli Infections (drug therapy, veterinary)
• Female
• Gram-Negative Bacterial Infections (drug therapy, microbiology, veterinary)
• Klebsiella Infections (drug therapy, veterinary)
• Mammary Glands, Animal (drug effects, microbiology)
• Mastitis, Bovine (drug therapy, microbiology)