• Korean Journal of Veterinary Service
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• v.37 no.3
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• pp.179-183
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• 2014

Reproductive losses in a herd can be huge. Fetal reabsorption or undefined infertility often remain undetected. Routine herds monitoring for exposure, controlling the introduction of potential agent carriers, appropriate biosafety procedures, and vaccination where possible are together the best security against abortion and stillbirth inducing disease. For biosecurity of local farms, we performed antibody titers of abortion and stillbirth related diseases such as bovine viral diarrhea virus (BVDV), infectious bovine rhinotracheitis virus (IBRV), Neospora caninum, Toxoplasma gondii and Campylobacter fetus subsp venerealis. The blood samples were collected from 500 female Hanwoo over 1 year old of 100 farms in Jeonbuk eastern area. Champhylobater serological test was evaluated by the standard tube agglutination test (STAT) and other pathogen's antibodies were detected by indirect-enzyme linked immunoassay (I-ELISA). The seroprevalence of abortion and stillbirth inducing disease were BVDV 72.4%, IBRV 13.0%, N. caninum 1.2%, T. gondii 10.4% and C. venerealis 0.6%, irrespectively.

• Journal of Veterinary Clinics
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• v.29 no.5
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• pp.395-399
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• 2012

In 2011, several herds in Youngju city in Gyeongbuk province underwent an outbreak of bovine viral diarrhea virus (BVDV) causing high morbidity and mortality. Genetic analysis revealed that two subgenotypes of BVDV-1b (n = 21) and BVDV-2a (n = 7) were identified. The BVDV-1b subgenotype was most frequently detected from our field cases and BVDV-2a subgenotype was also identified in this outbreak. These BVDV-1b infections showed severe acute clinical manifestations similar to BVDV-2 infection. This result reports the detection of BVDV-1b associated with an acute and fatal outbreak of BVDV in Korean indigenous calves.

• Korean Journal of Veterinary Research
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• v.46 no.2
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• pp.119-125
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• 2006

The objective of this study was to investigate the use of extract from mesenteric lymph nodes as an alternative to serum for ELISA to detect Salmonella antibodies in slaughter pigs. Among 324 slaughter pigs, 65 (20.1 %) were positive in the serum ELISA and 76 (23.5%) were positive in the ELISA with extract from lymph nodes. A total of 24 (7.4%) Salmonella representing 6 serotypes were isolated from mesenteric lymph nodes and 35 (10.8%) Salmonella belonging to 2 serotypes were also recovered from cecal contents of slaughter pig samples, respectively. The most prevalent serogroup was B (55.9% of isolates) and serotype was Typhimurium (52.5% of isolates). In the comparison of the results of between the serum ELISA and Salmonella isolation, kappa value was 0.28 with mesenteric lymph nodes and 0.37 with cecal contents, respectively. However, the extract ELISA had sensitivity of 98.5%, specificity of 95.4% and kappa value of 0.88 as compared with the serum ELISA. Because high degree of concordance between the serum ELISA and the extract ELISA was observed (P=0.24), extract from lymph nodes could be used as an alternative to serum for the detection of Salmonella antibodies in the ELISA.

• Korean Journal of Veterinary Service
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• v.30 no.3
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• pp.385-391
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• 2007

A novel enzyme linked immunosorbent assay (ELISA) is described and compared with other established serologic tests for bovine brucellosis, namely the rose bengal test (RBT), the complement fixation test (CFT), and the tube agglutination test (TAT) approved and used in Korea. A total of 109 bovine serum samples were tested using all the 4 assays and analyzed as to specificity, sensitivity, reproducibility and predictive value. The ELISA showed 100% agreement with the CFT. The least agreement between ELISA was observed with the TAT. The agreement between the ELISA and RBT was not significantly different from that observed between the CFT and the ELISA. It is concluded that the new assay would be a good candidate for routine serologic survey for brucellosis in Korea. A protocol combining the ELISA and the CFT would increase the power for detection of serologically positive individuals and herds.

• Korean Journal of Veterinary Service
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• v.37 no.2
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• pp.131-136
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• 2014

Thirteen diary cows were diagnosed as bovine tuberculosis (BTB) based on pathological findings and PCR method from 74 diary cows slaughtered in Incheon city. BTB was outbreaked 9 times in the farm from March 2010 to June 2013. The BTB confirmed cows were all negatives by intradermal test with PPD at 3 times. Recently, disagreement between BTB outbreak and intradermal test has been raised as a big problem. This phenomenon suggest that a new control programs are necessary at farm level as well as diagnostic level.

• Korean Journal of Veterinary Research
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• v.14 no.2
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• pp.273-279
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• 1974

Studies were made on the relation of mastitis infection rate to the management and sanitations of dairy farms by examining 46 dairy herds. The results obtained were as follows: 1. The higher infection rate was observed in farms managed by employees than by owners, and in impoprted cattle than cattle horn in Korea. 2. Type of education and the period of experience of management were not correlated to the infection rate. 3. The infection rate was the highest in Summer and in cattle of 5~8 lactating age group. 4. It was observed that the amount of water supply, time of cleaning stall, frequency of disinfection, the method of using cleaning towel and the method of milking were correlated to the infection rate.

• Korean Journal of Veterinary Service
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• v.29 no.4
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• pp.489-492
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• 2006

Albinism, characterized by absence or lack of pigmentation from the hair, skin, hooves, nasal region and the eyes is rarely seen in cattle in Korea. A 15-day old calf, approximately weighing 28 kg has been conspicuously distinct from the rest of 40 herds of cattle raised in Sunchang country because of its white coat color, white muzzle and hooves and eyes with light pinkish iris. The calf was born of Korean indigenous cattle with no previously reported history of albinism since inception of the farm for over a decade period. It was assumed as a form of recessive genetic disorder. This observation was documented to present occurrence of albinism in cattle in Korea.

• Korean Journal of Veterinary Research
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• v.19 no.2
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• pp.153-157
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• 1979

The authors encountered 78 cases of pig from two swine herds with severe dermatitis, which had been fed with commercial rations. Main clinical signs were hard crust formation or erythema and papules on the skin and retarted growth. The skin lesions were visible on the limb joints in all cases. In some cases, however, crusts occurred on the tail, perineum, hip, ear, back, or neck. In one case the entire body surface was covered with thick crust. No mites were detected on the microscopic examination of skin scrapings. Histological examination of biopsies skin specimens taken from the lesions revealed typical parakeratotic changes: the cornified layer of epidermis was irregularly inreased in thickness and contained numerous nuclei. The provision of dietary supplementation with zinc sulfate and soybean oil for 10 days showed marked curative effect.

• Journal of Veterinary Clinics
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• v.24 no.2
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• pp.142-149
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• 2007

The purpose of this study was to develop a computerized software program to help for reproductive management in dairy cows. The developed software program in the study is compatible with a window 95/98 or XP system. Data in the system were recorded, stored, and processed from two sources: 1) Data downloaded monthly from the database of the Korean Dairy Herd Improvement Association (milk yields, milk somatic cell counts, milk fat, protein, lactose and urea nitrogen content). 2) Data recorded by the farmer or veterinarians by the time (body condition score, heats, inseminations, veterinary diagnosis and treatments). These data indices after processing by computerized dairy management system were presented by numerical or graphical display. The presented data were obtained from three dairy farms with more than 50 milking cows. The presented reports of this program using milk fat, protein, urea nitrogen, and somatic cell counts enabled the dairy producer and veterinarians to monitor the protein-energy balance and feeding management practice, and for distribution of diseases (mastitis, metabolic and reproductive disorder) in individual cows. The presented analytical reports of this program also included herd average of reproductive indices such as day to first insemination, days open, and inseminations per conception. This software program will assist in analysis, interpretation and demonstrate the results of reproductive trials conducted in dairy herds.

• Korean Journal of Veterinary Research
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• v.10 no.1
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• pp.39-45
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• 1970

A total of 835 quarter milk samples of 212 dairy cows from 14 herds were examined for mastitis and the results obtained were as follows; 1. Three hundred and fifty-eight quarters(42.9%) from 149 cows(70.3%) were found to be infected with mastitis. It was found that 11(1.3%) of the infected quarters were clinical mastitis and all of the rest were subclinical mastitis. 2. Streptococcus agalactiae(62 quarters) and Staphylococcus aureus(42 quarters) were the main two causative organisms of the mastitis. Streptococcus dysgalactiae, Streptococcus uberis, other streptococci, Corynebacteria, and Yeast were also found to cause the infection. 3. The majority of Staphylococcus aureus strains were sensitive to penicillin, orbenin, terramycin, and leucomycin, however, the most of Streptococcus strains were sensitive to penicillin and orbenin only. 4. Penicillin and orbenin were highly effective in the treatment of mastitis, especially orbenin for Staph ylococcus aureus infection and penicillin for Streptococcal infection. 5. A mastitis control program for dairy farms in Korea was discussed and recommended.