Peer-reviewed veterinary case report
Lavender oil effects on dog ear infections with bacteria and yeast
By Neisari, Navid et al.·Published in Veterinary medicine and science·2025·Department of Microbiology and Immunology·View original on PubMed →
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Original publication title: Evaluating the Antimicrobial and Antibiofilm Efficacy of Lavender Essential Oil and Linalool on Dual Candida albicans Biofilms With Staphylococcus aureus and Staphylococcus epidermidis From Canine External Otitis.
- Species:
- dog
Plain-English summary
A study found that lavender essential oil (LEO) can effectively fight infections in dogs caused by certain bacteria and yeast, specifically Staphylococcus aureus, Staphylococcus epidermidis, and Candida albicans. These infections often lead to ear problems in dogs. The researchers discovered that LEO could completely stop the growth of these germs in biofilms, which are clusters of bacteria that are hard to treat. Using LEO at the right concentration showed promising results, suggesting it could be a helpful treatment option for dogs suffering from these types of infections.
People also search for: dog ear infection treatment · lavender oil for dog infections · Candida albicans in dogs
Abstract
BACKGROUND: Biofilm formation significantly contributes to the rise of antimicrobial resistance, treatment failures and recurrent infections. Essential oils (EOs), particularly lavender EO (LEO), have gained attention for their antimicrobial and antibiofilm activities. This study investigates the effects of LEO and linalool on Staphylococcus aureus (S. aureus), Staphylococcus epidermidis (S. epidermidis), and Candida albicans (C. albicans) isolates. MATERIALS AND METHODS: The chemical composition of LEO was analysed using gas chromatography-mass spectrometry (GC-MS). Eight clinical and reference microorganisms were tested, including four C. albicans, three S. aureus, and three S. epidermidis isolates, to assess their biofilm-producing potential with the tissue microtiter plate method. Antimicrobial and antibiofilm activities of LEO and linalool were evaluated in planktonic, single-biofilm, and dual-biofilm phases through microbroth dilution and scanning electron microscopy (SEM). RESULTS: The minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC) of LEO in the planktonic phase were 1250 µg/mL and 2500 µg/mL against Staphylococcus isolates, respectively, while the corresponding value for C. albicans isolates was 5000 µg/mL. 90% biofilm inhibition was achieved at concentrations of 5000 µg/mL and 40,000 µg/mL for Staphylococcus and C. albicans, respectively. LEO completely inhibited dual biofilms formed by C. albicans/S. aureus and C. albicans/S. epidermidis at 20,000 µg/mL, whereas linalool attained 100% inhibition at 40,000 µg/mL. CONCLUSION: LEO demonstrates significant antimicrobial and antibiofilm activity against Staphylococcus and C. albicans isolates, effective in both planktonic and biofilm phases.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/40406870/