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In vitro antimicrobial activity of non‐traditional therapies for infectious endometritis in mares
Author(s) -
Mazzuchini Mariana P.,
Lisboa Fernando Paixão,
Castro Jessica I.,
Alvarenga Marco A.,
Segabinazzi Lorenzo G. T. M.,
Canisso Igor F.
Publication year - 2025
Publication title -
equine veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 87
eISSN - 2042-3306
pISSN - 0425-1644
DOI - 10.1111/evj.14423
Subject(s) - antimicrobial , endometritis , medicine , pseudomonas aeruginosa , antibiotics , microbiology and biotechnology , staphylococcus aureus , minimum inhibitory concentration , broth microdilution , biology , bacteria , pregnancy , genetics
Abstract Background Endometritis is the leading cause of subfertility in horses, and it is a clinical problem where historically antibiotics have not always been used with prudent justification. Because of this, alternative therapies to treat endometritis are necessary for the rational use of antibiotics. Objectives To assess the in vitro antimicrobial activity of non‐traditional therapies commonly used in clinical practice against microorganisms causing infectious endometritis in mares. Study design In vitro experiments. Methods A microdilution technique was performed to determine the minimum inhibitory concentrations (MIC) of 50%, 90% and 100% of microorganisms and the percentage of inhibition (PI) of each therapy against each microorganism ( Escherichia coli , Pseudomonas aeruginosa , Klebsiella pneumoniae , Staphylococcus aureus and Candida sp.). The MIC 50% and 90% were determined using non‐linear regression, while MIC 100% was assessed using the resazurin dye technique. The serial PI was evaluated for each therapy using a spectrophotometer. Results All the therapies demonstrated a PI higher than positive controls for all microorganisms ( p < 0.05); however, the only therapies that presented MIC 100 values were hydrogen peroxide and platelet‐rich and ‐poor plasma. Main limitations In vivo, safety and treatment efficacy were not tested. Conclusion Hydrogen peroxide and platelet‐rich and ‐poor plasma might be alternatives to traditional therapies for endometritis to support a reduction in antibiotic use.