| Therapeutic effect of oregano essential oil on subclinical bovine mastitis caused by Staphylococcus aureus and Escherichia coli |
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Byung-Wook Cho1, Chun-Nam Cha2, Soo-Mi Lee3, Mee-Jeong Kim3, Ju-Yeon Park3, Chang-Yeol Yoo4, Song-Ee Son5, Suk Kim5, Hu-Jang Lee3 |
1Department of Animal Science, College of Life Sciences, Pusan National University
2Engineering Research Institute and Department of Industrial Systems Engineering, College of Veterinary Medicine, Gyeongsang National University
3Department of Environmental Health, Graduate School of Public Health, College of Veterinary Medicine, Gyeongsang National University
4Department of Computer Information, Gyeongnam Provincial Namhae College
5Research Institute of Life Sciences, College of Veterinary Medicine, Gyeongsang National University |
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| Abstract |
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Oregano (Origanum vulgare) is an aromatic herb belonging to the Lamiaceae family. This study evaluated the therapeutic effect of oregano essential oil (OEO) on clinical bovine mastitis caused by Staphylococcus (S.) aureus and/or Escherichia (E.) coli. Thirty-two quarters from 18 lactating cows with subclinical mastitis were selected from a dairy farm and were divided into 4 groups (8 quarters/group): negative control (CON), positive control (GEN) and two OEO-treated groups (OEO-1 and OEO-2). Each group was intramammarily treated with saline, 10 g/tube of gentamicin ointment, and single and double doses of 0.9 mL OEO ointment twice a day for three days, respectively. After the treatments, physical udder conditions were greatly improved in GEN and OEO groups. In CON group, somatic cell counts (SCCs), number of white blood cells (WBC) and bacteria were increased. However, in OEO groups, SCCs and number of WBC were significantly decreased and S. aureus and E. coli were not detected in milk as compared with those before the treatments as well as GEN group. These results suggest that OEO may be a useful alternative to antibiotics for the control of subclinical bovine mastitis caused by S. aureus and/or E. coli. |
| Key Words:
bovine mastitis, Escherichia coli, oregano essential oil, Staphylococcus aureus, therapeutic effect |
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