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Isolation and Antimicrobial Susceptibility of Microorganisms from Milk Samples of Jindo Dogs (Canis familiaris var. jindo)
2011
Lee, J.D., Jeollanamdo Livestock Sanitation Office, Gangjin, Republic of Korea | Lee, Y.K., Chonnam National University, Gwangju, Republic of Korea | O, S.I., Jindo Dog Research and Testing Center, Jindo, Republic of Korea | Jung, J.Y., Jeollanamdo Livestock Sanitation Office, Gangjin, Republic of Korea | Son, C.H., Chonnam National University, Gwangju, Republic of Korea | Shin, S.S., Chonnam National University, Gwangju, Republic of Korea | Oh, K.S., Chonnam National University, Gwangju, Republic of Korea | Hur, T.Y., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Suh, G.H., Chonnam National University, Gwangju, Republic of Korea
Lack of hygiene and puerperal mastitis are common causes of bacterial diseases in nursing neonates. The aim of this study was to isolate microorganisms from milk samples of healthy female Jindo dogs with suckling puppies and to investigate antimicrobial susceptibility against the isolated bacteria. Milk samples were collected from 120 udders of 12 lactating Jindo dogs that were 2~4 years old without any clinical diseases including mastitis. Bacteria were isolated from 64 milk samples (53.3%), either singly (76.6%) or in combination (23.4%). Staphylococcus (S.) spp. was the most common microorganisms (74.7%) isolated from canine milk, followed by Haemophillus spp. (10.9%), Streptococcus spp. (9.6%), Gardnerella spp. (2.4%) and Moraxella spp. (2.4%). The most frequently isolated organism was S. warneri (31.3%). Antimicrobial susceptibility of these bacteria was tested with 17 antimicrobial agents by Kirbyand Bauer standardized disc diffusion method. Results indicated that bacteria isolated from healthy canine milk were mostly susceptible to amoxicillin-clavulanic acid, cephalothin and ceftiofur, but were resistant to erythromycin, neomycin and tetracycline.
Show more [+] Less [-]Identification of osteopontin in milk and in the mammary glands of cows
2007
Kang, J.Y. (Jeju milk Co., Ltd., Jeju, Republic of Korea) | Kim, H.C. (Cheju National University, Jeju, Republic of Korea) | Kim, D.S. (Jeju milk Co., Ltd., Jeju, Republic of Korea) | Jee, Y.H. (Cheju National University, Jeju, Republic of Korea) | Shin, T.K. (Cheju National University, Jeju, Republic of Korea), E-mail: shint@cheju.ac.kr
The importance of milk for the growth and health of a newborn offspring is well known. Milk contains immunoglobulin G (Ig G), Ig A, lactoperoxidase, lactoferin, cytokines, and growth factors. Osteopontin, one of the multifunctional proteins, is secreted by macrophages, T cell, and epithelial cells. Although osteopontin production in bovine milk have been documented, the precise expression levels in bovine milk have not been clarified. The aim of this study was to observe the expression of osteopontin, in bovine milk during the lactation period or bovine mammary glands.
Show more [+] Less [-]Occurrence of aflatoxin M₁ in milk determined by HPLC with derivatization method in Korea (1999-2000)
2007
Kang, H.G. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea), E-mail: kanghg@nvrqs.go.kr | Cho, J.H. (National Veterinary Research and Quarantine Service, Anyang, Republic of Korea)
In this study, the levels of aflatoxin M₁(AFM₁) in milk were determined by HPLC with derivatization method. Milk samples were purified using C∧18 disposable cartridge followed by derivatization with trifluoroacetic acid and analysed using HPLC with fluorescence detection. The recoveries of AFM₁ from milk samples added AFM₁ at a level of 0.025~0.1 ng/ml were 94.7~98.0% with detection limit of 0.009 ng/ml. The amounts of AFM₁ were determined below 0.05 ng/ml for all tested samples of commercial milk collected in 1999 and 2000.
Show more [+] Less [-]A study on the drug residues in the raw milk collected over the withdrawal period after mastitis treatment using TTC-II test and delvotest SP
1999
Kang, J.H. | Kim, J.S. | Lee, W.C. (KonKuk University, Seoul (Korea Republic). School of Veterinary Medicine)
From July of 1997 to June of 1998, total 279 raw milk samples over wkthdarwal period after mastitis treatment from dairy farms located in the provinces of Kyonggi and Choongchung were collected to test drug residues. Each sample was tested by TTC-II test and Delvotest SP. Among the total 152 raw milk samples of cow treated by beta-lactams, 32 samples(21.2%) were positive on the Delvotest and 15 samples(9.9%) showed positive on the TTC-II test. Also, from the total 37 samples treated by sulfonamides, 5 samples(13.5%) were positive on the Delvotest and 3 samples(8.1%) showed positive on the TTC-II test. For the total 55 raw milk samples of cow treated by tetracyclines, 9 samples(16.4%) were positive on the Delvotest and 5 samples(9.1%) showed positive on the TTC-II test. In addition, from the total 35 samples treated by aminoglycosides, 7 samples(20.0%) were positive on the Delvotest and 5 samples(14.3%) showed positive on the TTC-II test. Our study shows that it is possible that drugs are to be detected by the drug residues test of and individual raw milk even over the withdrawal period after mastitis treatment and the raw milk of bulk tank.
Show more [+] Less [-]Residual determination of Ceftiofur in Raw Bovine Milk by Liquid Chromatography-Electrospray Mass Spectrometry
Lim, J.H.;Park, B.K.;Kim, M.S.;Jang, B.S.;Yun, H.I.(Chungnam National University, Daejeon, Republic of Korea)E-mail:hiyun@cnu.ac.kr | Kim, D.(Kangwon National University, Chuncheon, Republic of Korea)
This report describes the determination of ceftiofur residues in milk from treatment of lactating dairy cattle by intramuscular injection of three consecutive daily doses of about 1 mg /kg BW, the recommended label dosing. The separation of ceftiofur was achieved on C∧18 reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and 0.05% acetic acid in acetonitrile (B) and grediently flowed at the flow rate of 0.4 mL/min. As a result of analysis of blank raw bovine milk samples, matrix interference was not shown.
Show more [+] Less [-]Progesterone assays as an aid for improving reproductive efficiency in dairy cattle-(2)-Use of plasma or milk progesterone profiles for differential diagnosis of ovarian cysts
1994
Kang, B.K. | Choi, H.S. | Son, C.H. | Chon, H.S. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine) | Choi, S.G. (Suhkwang Livestock Company, Ltd., Kwangju (Korea Republic))
Progesterone assays as an aid for improving reproductive efficiency in dairy cattle-(4)-Milk progesterone profiles for monitoring postpartum ovarian activity
1994
Kang, B.K. | Choi, H.S. | Son, C.H. | Kang, H.K. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine) | Choi, S.G. (Suhkwang Livestock Company, Ltd., Kwangju (Korea Republic))
Progesterone assays as an aid for improving reproductive efficiency in dairy cattle-(1)-Use of milk progesterone profiles in the confirmation of estrus detection and early pregnancy diagnosis
1994
Kang, B.K. | Choi, H.S. | Son, C.H. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine) | Choi, S.G. (Suhkwang Livestock Company Ltd., Kwangju (Korea Republic))
Progesterone assays as an aid for improving reproductive efficiency in dairy cattle-(3)-Milk progesterone profiles in repeat-breeder dairy cows
1994
Kang, B.K. | Choi, H.S. | Son, C.H. | Chon, H.S. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine) | Choi, S.G. (Suhkwang Livestock Company Ltd., Kwangju (Korea Republic))
Studies on the safety of recombinant bovine somatotropin in dairy cow, 1; Effects of recombinant bovine somatotropin on mineral composition in milk of dairy cows
1991
Lee, M.H. (Seoul National Univ., Suwon (Korea Republic). Coll. of Veterinary Medicine) | Cho, T.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)