Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa
Infections caused by oxacillin-resistant <i>Staphylococcus pseudintermedius</i> are increasingly common in veterinary medicine. The indiscriminate use of antibiotics by pet owners worsens this problem, reducing treatment efficacy and creating the need for alternative therapies. This stud...
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2025-07-01
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| author | Vanessa Danielle de Freitas Edison Lorran Jerdlicka Coelho Janaina Marcela Assunção Rosa Moreira Valéria Dutra Valéria Régia Franco Sousa Arleana do Bom Parto Ferreira de Almeida |
| author_facet | Vanessa Danielle de Freitas Edison Lorran Jerdlicka Coelho Janaina Marcela Assunção Rosa Moreira Valéria Dutra Valéria Régia Franco Sousa Arleana do Bom Parto Ferreira de Almeida |
| author_sort | Vanessa Danielle de Freitas |
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| description | Infections caused by oxacillin-resistant <i>Staphylococcus pseudintermedius</i> are increasingly common in veterinary medicine. The indiscriminate use of antibiotics by pet owners worsens this problem, reducing treatment efficacy and creating the need for alternative therapies. This study aimed to evaluate the inhibitory effect of clove essential oil (<i>Syzygium aromaticum</i>) on both oxacillin-resistant and susceptible <i>S. pseudintermedius</i>. Thirty-five isolates from dogs with otitis externa were analyzed. The bacteria were identified by phenotypic tests and tested for susceptibility to 22 antibiotics using disk diffusion. Resistance genes (<i>mecA</i> and <i>blaZ</i>) were detected using conventional PCR. Among the isolates, 34.28% (12/35) were positive for <i>mecA</i>, and 97.14% (34/35) for <i>blaZ</i>. The essential oil’s efficacy was assessed using broth microdilution to determine its minimum inhibitory concentration (MIC). Clove oil showed an average MIC and minimum bactericidal concentration (MBC) of 6.4 mg/mL, inhibiting both resistant and susceptible isolates. In conclusion, clove essential oil demonstrated in vitro antimicrobial activity against <i>S. pseudintermedius</i>. |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-07-01 |
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| series | Pathogens |
| spelling | doaj-art-cc2edb9576b24bd99d815ef6de67d1132025-08-20T03:56:45ZengMDPI AGPathogens2076-08172025-07-0114770910.3390/pathogens14070709Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis ExternaVanessa Danielle de Freitas0Edison Lorran Jerdlicka Coelho1Janaina Marcela Assunção Rosa Moreira2Valéria Dutra3Valéria Régia Franco Sousa4Arleana do Bom Parto Ferreira de Almeida5Postgraduate Program in Veterinary Sciences, Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilPostgraduate Program in Veterinary Sciences, Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilPostgraduate Program in Veterinary Sciences, Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilCollege of Veterinary Medicine (FAVET), Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilCollege of Veterinary Medicine (FAVET), Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilCollege of Veterinary Medicine (FAVET), Federal University of Mato Grosso (UFMT), Cuiabá 78060-900, Mato Grosso, BrazilInfections caused by oxacillin-resistant <i>Staphylococcus pseudintermedius</i> are increasingly common in veterinary medicine. The indiscriminate use of antibiotics by pet owners worsens this problem, reducing treatment efficacy and creating the need for alternative therapies. This study aimed to evaluate the inhibitory effect of clove essential oil (<i>Syzygium aromaticum</i>) on both oxacillin-resistant and susceptible <i>S. pseudintermedius</i>. Thirty-five isolates from dogs with otitis externa were analyzed. The bacteria were identified by phenotypic tests and tested for susceptibility to 22 antibiotics using disk diffusion. Resistance genes (<i>mecA</i> and <i>blaZ</i>) were detected using conventional PCR. Among the isolates, 34.28% (12/35) were positive for <i>mecA</i>, and 97.14% (34/35) for <i>blaZ</i>. The essential oil’s efficacy was assessed using broth microdilution to determine its minimum inhibitory concentration (MIC). Clove oil showed an average MIC and minimum bactericidal concentration (MBC) of 6.4 mg/mL, inhibiting both resistant and susceptible isolates. In conclusion, clove essential oil demonstrated in vitro antimicrobial activity against <i>S. pseudintermedius</i>.https://www.mdpi.com/2076-0817/14/7/709otitismultidrug resistanceoxacillindogsessential oils |
| spellingShingle | Vanessa Danielle de Freitas Edison Lorran Jerdlicka Coelho Janaina Marcela Assunção Rosa Moreira Valéria Dutra Valéria Régia Franco Sousa Arleana do Bom Parto Ferreira de Almeida Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa Pathogens otitis multidrug resistance oxacillin dogs essential oils |
| title | Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa |
| title_full | Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa |
| title_fullStr | Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa |
| title_full_unstemmed | Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa |
| title_short | Antibacterial Activity of Clove Essential Oil (<i>Syzygium aromaticum</i>) Against Oxacillin-Resistant <i>Staphylococcus pseudintermedius</i> Isolated from Dogs with Otitis Externa |
| title_sort | antibacterial activity of clove essential oil i syzygium aromaticum i against oxacillin resistant i staphylococcus pseudintermedius i isolated from dogs with otitis externa |
| topic | otitis multidrug resistance oxacillin dogs essential oils |
| url | https://www.mdpi.com/2076-0817/14/7/709 |
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