Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXX, Issue 2
Written by Cristina CĂȘARU, Anca BULGARU, Elena NEGRU, Mihai DANEȘ, Doina DANEȘ
Antibiotic resistance has become a global concern, with major implications in both human and veterinary medicine. In recent years, new therapies have been sought as alternatives to antibiotics. In this regard, essential oils extracted from medicinal plants have been shown to be effective in many cases. The purpose of our study was to test the efficacy of the essential oils of thyme, clove, peppermint, and cinnamon against ten bacterial strains isolated from cows with clinical mastitis. Sixty percent of the bacterial strains examined in the study were found to be resistant to five or more antibiotics. The effectiveness of essential oils was tested using the aromatogram method. The results varied depending on the bacterial strain and concentration of the tested essential oils. Cinnamon, thyme, and the mixture of the four oils were the most effective products. The highly resistant S. aureus isolate (7 from 12 antibiotic molecules), proved to be extremely sensitive to the essential oils of thyme and cinnamon and highly sensitive to the mixture of oils.
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