Antimicrobial Use in Horses Undergoing Colic Surgery
Article first published online: 20 NOV 2012
Copyright © 2012 by the American College of Veterinary Internal Medicine
Journal of Veterinary Internal Medicine
Volume 26, Issue 6, pages 1449–1456, November/December 2012
How to Cite
Dallap Schaer, B.L., Linton, J.K. and Aceto, H. (2012), Antimicrobial Use in Horses Undergoing Colic Surgery. Journal of Veterinary Internal Medicine, 26: 1449–1456. doi: 10.1111/j.1939-1676.2012.01024.x
- Issue published online: 20 NOV 2012
- Article first published online: 20 NOV 2012
- Manuscript Accepted: 10 SEP 2012
- Manuscript Revised: 24 JUL 2012
- Manuscript Received: 30 MAY 2012
- Antibiotic choices;
- Clinical trials;
- Equine species;
- Evidence-based medicine;
- Perioperative management;
Recommendations for antimicrobial prophylaxis for surgery are well-described in human medicine, but information is limited for veterinary practice.
To characterize antimicrobial use in horses undergoing emergency colic surgery.
A total of 761 horses undergoing emergency colic surgery (2001–2007).
Retrospective case review. Antimicrobial dose and timing, surgical description, and duration of treatment were collected from medical records. Associations between antimicrobial use and the occurrence of fever, incisional inflammation or infection, catheter-associated complications, or Salmonella shedding during hospitalization were analyzed using rank-sum methods and logistic regression.
A total of 511 (67.2%) horses received an inappropriate amount of drug preoperatively. Median time from preoperative dose to incision was 70 (IQR 55–90) minutes; median total surgery time was 110 (IQR 80–160) minutes. Seventy-three horses were euthanized under anesthesia because of poor prognosis. Of 688 horses, 438 should have been redosed intraoperatively based on the duration of surgery. Only 8 (1.8%) horses were redosed correctly. Horses remained on perioperative antimicrobials a median of 3 (IQR 2–4.5) days. Antimicrobial therapy was reinstituted in 193 (28.9%) horses, and median days of total treatment were 3.8 (IQR 2–6). Signs that led to reinstituting therapy were fever (OR 3.13, P = .001) and incisional inflammation/infection (OR 2.95, P = .001). Horses in which treatment was reinstituted had 2.3 greater odds of shedding Salmonella (P = .003). Increased surgical time was associated with longer duration of antimicrobial therapy (OR 1.02, P = .001).
Conclusions and Clinical Relevance
Despite published recommendations regarding antimicrobial prophylaxis, compliance is poor; improvement might reduce postoperative complications.