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Dehydrating and bacterial elimination effects of fecal dehydrating system for reducing bovine mastitis derived from environmental contamination
2009
Kim, D.H., Gyeongsang National University, Jinju, Republic of Korea | Lim, J.J., Gyeongsang National University, Jinju, Republic of Korea | Lee, J.J., Gyeongsang National University, Jinju, Republic of Korea | Kim, D.G., Gyeongsang National University, Jinju, Republic of Korea | Chang, H.H., Gyeongsang National University, Jinju, Republic of Korea | Lee, S.J., Gyeongsang National University, Jinju, Republic of Korea | Lee, Y.B., Gyeongsang National University, Jinju, Republic of Korea | Chang, D.I., Gyeongsang National University, Jinju, Republic of Korea | Lee, H.J., Gyeongsang National University, Jinju, Republic of Korea | Min, W.G., Gyeongsang National University, Jinju, Republic of Korea | Kim, S.H., Chungnam National University, Daejeon, Republic of Korea | Oh, K.Y., Chungnam National University, Daejeon, Republic of Korea | Kim, S., Gyeongsang National University, Jinju, Republic of Korea
Bovine mastitis is an important disease causing serious economic loss in dairy production and food poison in public health. Escherichia coli and Staphylococcus aureus are the major causative agents of bovine mastitis. These bacteria were found in milk and environmental condition such as feces, water, soil and so on. Bovine mastitis causative micro-organisms can survive in 1-2 weeks in feces and bed complexes. Low level of percentage of water content (PWC) of feces and bed complexes can reduce the spreading of bovine mastitis incidence from environmental contamination. In this study, we developed the fecal dehydrating system and determined the elimination rates of bovine mastitis causative agent from feces and bed complexes. To develop the fecal dehydrating system, the screw pressurized dehydrating system was used and the maximum rate of dehydrating was reached to 52% PWC using 90% PWC (wet base) of fecal and bed complexes. The elimination rates of the dehydrating system for E. coli and S. aureus were reached at 41.19±7.84% to 62.55±8.71% in various percentages of PWC of feces and bed complexes (80, 85 and 90%). These results suggested that the application of fecal dehydrating system would reduce can exposure of dairy cattle to bovine mastitis causing agents contaminated feces and bed complexes, and can be used for environmental bovine mastitis control avoiding misuse or abuse of chemical disinfectants and antibiotics in dairy farm.
Show more [+] Less [-]Molecular identification of coagulase-negative staphylococci by rpoB sequence typing
2018
Seong, W.J., Seoul National University, Seoul, Republic of Korea | Kim, D., Seoul National University, Seoul, Republic of Korea | Kim, E.K., Seoul National University, Seoul, Republic of Korea | Ko, D.S., Seoul National University, Seoul, Republic of Korea | Ro, Y., Seoul National University, Seoul, Republic of Korea | Kim, J.H., Institutes of GreenBio Science Technology, Pyeongchang, Republic of Korea | Kwon, H.J., Seoul National University, Seoul, Republic of Korea
Bovine mastitis (BM) has resulted in enormous economic loss in the dairy industry and coagulase-negative staphylococci (CNS) have caused subclinical BM. Although VITEK 2 GP ID card (VITEK 2) has been used for CNS identification, the probability of identification varies. The rpoB sequence typing (RSTing) method has been used for molecular diagnosis and epidemiology of bacterial infections. In this study, we undertook RSTing of CNS and compared the results with those of VITEK2 and 16S rRNA gene sequencing. As compared VITEK2, the molecular-based methods were more reliable for species identification; moreover, RSTing provided more molecular epidemiological information than that from 16S rRNA gene sequencing.
Show more [+] Less [-]Therapeutic effect of oregano essential oil on subclinical bovine mastitis caused by Staphylococcus aureus and Escherichia coli
2015
Cho, B.W., Department of Animal Science, College of Life Sciences, Pusan National University, Miryang, Republic of Korea | Cha, C.N., Engineering Research Institute and Department of Industrial Systems Engineering, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Lee, S.M., Department of Environmental Health, Graduate School of Public Health, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Kim, M.J., Department of Environmental Health, Graduate School of Public Health, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Park, J.Y., Department of Environmental Health, Graduate School of Public Health, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Yoo, C.Y., Department of Computer Information, Gyeongnam Provincial Namhae College, Namhae, Republic of Korea | Son, S.E., Research Institute of Life Sciences, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Kim, S., Research Institute of Life Sciences, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea | Lee, H.J., Department of Environmental Health, Graduate School of Public Health, College of Veterinary Medicine, Gyeongsang National University, Jinju, Republic of Korea
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.
Show more [+] Less [-]Relationship between the N-acetyl-Beta-D-glucosarminidase levels and the presence of mastitis pathogens in bovine mastitis milk samples
1993
Kang, B.K. | Nam, H.M. | Shon, C.H. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine)
A study on efficacy of chitosan on bovine mastitis
1998
Moon, J.S. | Joo, Y.S. | Ku, B.G. | Kim, J.Y. (National Veterinary Research Institute, RDA, Anyang (Korea Republic)) | Kim, D.W. (Samyang Pharma Chemical Company, LTD., Seoul (Korea Republic)) | Park, Y.H. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine) | Hahn, T.W. (University of Georgia, Georgia (USA))