Equine uterine sanitizer: in vitro inhibition of endometritis-causing microorganisms and its stability to dilute antibiotics.
Authors: Mazzuchini Mariana P, Lisboa Fernando P, Segabinazzi Lorenzo G, Canisso Igor F
Journal: Journal of equine veterinary science
Summary
# Editorial Summary Endometritis remains the primary driver of subfertility in mares, and whilst most cases respond to conventional treatment, practitioners increasingly encounter resistant cases requiring alternative or adjunctive therapies. Researchers from the University of Florida evaluated a commercially available uterine sanitizer product using in vitro microdilution broth techniques to assess antimicrobial efficacy against five key endometritis pathogens (Escherichia, Staphylococcus, Klebsiella, Pseudomonas and Candida species), determining minimum inhibitory concentrations at 50%, 90% and 100% suppression levels; they additionally tested whether the product could safely dilute common antibiotics without chemical degradation across physiologically relevant temperatures (5°C, 21°C and 37°C). The sanitizer demonstrated inhibitory activity against all tested organisms, with E. coli proving most susceptible and Pseudomonas aeruginosa most resistant; despite the product's acidic pH of 4, combining it with antibiotics preserved antibiotic stability, maintained consistent pH across all temperature conditions and produced no precipitation over 24 hours. Practitioners should recognise that whilst these laboratory findings suggest antimicrobial potential and chemical compatibility with standard antibiotic protocols, the clinical translation remains unknown—in vivo efficacy, safety in the equine endometrium and comparative efficacy against current gold-standard treatments require investigation before adoption into practice protocols.
Read the full abstract on PubMed
Practical Takeaways
- •This uterine sanitizer shows promise as an adjunctive therapy for mares with endometritis, particularly those resistant to standard treatments, but clinical trials are needed before recommending it in practice.
- •The product is compatible with dilution of standard antibiotics without degradation, offering potential for combined antimicrobial therapy protocols.
- •Clinical efficacy and safety in living mares have not yet been demonstrated, so use should remain cautious and evidence-based once in vivo studies are completed.
Key Findings
- •The uterine sanitizer demonstrated inhibitory properties against all tested endometritis-causing microorganisms, with Escherichia sp. being most susceptible and Pseudomonas sp. most resistant.
- •The uterine sanitizer maintained an acidic pH of 4 and did not alter antibiotic pH or cause precipitation when used to dilute commonly used antibiotics across temperatures of 5°C, 21°C, and 37°C over 24 hours.
- •The combination of uterine sanitizer with antibiotics remained stable and could potentially potentiate antimicrobial effects, though clinical in vivo efficacy and safety remain untested.