• Parasites, Hosts and Diseases
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• v.51 no.5
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• pp.599-602
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• 2013

A male patient with neurocysticercosis was identified in Montai Village, Xay District, Oudomxay Province, Lao PDR in February 2004. He had a history of diagnosis for neurocysticercosis by a CT scan in Thailand after an onset of epileptic seizure in 1993. A pig in the same district was found to contain Taenia solium metacestodes (=cysticerci); the slaughtered pig body contained more than 2,000 cysticerci. In addition to morphological identification, molecular identification was also performed on the cysticerci by DNA sequencing analysis of the mitochondrial cox1 gene; they were confirmed as T. solium metacestodes. The patient is regarded as an indigenous case of neurocysticercosis infected in an endemic focus of T. solium taeniasis/cysticercosis in Oudomxay Province, Lao PDR.

• Korean Journal of Veterinary Research
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• v.46 no.3
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• pp.275-278
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• 2006

A 7-month-old brown pig with a discoid and pedunculate mass measuring $14.0{\times}12.5{\times}2.5cm$ on the skin of the right shoulder was noted at the slaughter house in Jeju. The surface of mass approximately $7{\times}4cm$ was interfaced with skin. The color of mass with firm consistency was mainly black and partially white on cut surface. Histopathologically, numerous unencapsulated endocrine-like cellular nodules of epithelioid cell type with abundant intracytoplasmic black pigment, melanin, were occupied in dermis and subcutis. Most of nodules in deep dermis were surrounded by lightly pigmented spindle cells and loose fibrous tissues. Mitotic figures were infrequently observed. The overlying epidermis was hyperplastic due to the down-growth of rete peg. Based on the gross and histopathologic findings, this case was diagnosed as cutaneous melanoma. In our best knowledge, this is the first case of swine cutaneous melanoma in Korea.

• Korean Journal of Agricultural Science
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• v.49 no.1
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• pp.61-75
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• 2022

The first purpose of this study is to evaluate the usefulness of pork traceability data, which is monthly time-series data, and to draw implications with regard to its usefulness. The second purpose is to construct a dynamic ecological equation model (DEEM) that reflects the biological characteristics at each growth stage, such as pregnancy, birth and growth, and the slaughter of pigs, using traceability data. With the monthly pig model devised in this study, it is expected that the number of slaughtered animals (supply) that can be shipped in the future is predictable and that policy simulations are possible. However, this study was limited to traceability data and focused only on building a supply-side model. As a result of verifying the traceability data, it was found that approximately 6% of farms produce by mixing great grand parent (GGP), grand parent (GP), parent stock (PS), and artificial insemination (AI), meaning that it is necessary to separate them by business type. However, the analysis also showed that the coefficient values estimated by constructing an equation for each growth stage were consistent with the pig growth outcomes. Also, the model predictive power test was excellent. For this reason, it is judged that the model design and traceability data constructed with the cohort and the dynamic ecological equation model system considering biological growth and shipment times are excellent. Finally, the model constructed in this study is expected to be used as basic data to inform producers in their decision-making activities and to help with governmental policy directions with regard to supply and demand. Research on the demand side is left for future researchers.

• Korean Journal of Agricultural Science
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• v.42 no.2
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• pp.125-129
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• 2015

This study was conducted to investigate the incidence of bone-fracture from pig carcass slaughtered in eight processing plants located in Daejeon and Chungnam area, Korea, during the year 2013 and 2014, and to evaluate the quality of semimembranous muscle from bone-fractured carcasses. Twenty semimembranous muscles were collected from bone-fractured carcasses and none bone-fractured (control) ones, respectively, after storage of pig carcass at $5^{\circ}C$ for 24 h. The pH, cooking loss, and color of semimembranous muscle were measured as quality parameters. In total 4,865,502 of pig carcasses, the occurrence of bone fracture was 0.328% (15,975 heads) and scored the highest defect (26.31%) in total abnormal carcasses. The pH and cooking loss of semimembranous muscle from bone-fractured carcasses were significantly lower than those of control (p<0.05). $L^*$ and $a^*$ values of semimembranous muscle were not significantly different between bone-fractured carcass and control whereas that of $b^*$ values was significantly higher in bone-fractured carcass than control (p<0.05). Eight out of twenty semimembranous muscle collected from bone-fractured carcasses were confirmed as PSE whereas only one in control. In conclusion, the incidence of bone-fracture pre- and during slaughter of pig may cause serious defects in final meat quality. Therefore, the proper handling and treatment should be implicated to avoid and/or decrease the incidence of bone-fracture of pigs.

• Korean Journal of Veterinary Service
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• v.14 no.2
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• pp.134-142
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• 1991

We surveyed the antibody titers in the slaughtered pigs by enzyme immunodiffusion method for the epidemiological distribution of Aujeszky's disease in Korea. And also we observed the clinical symptoms, histopathological findings and antibody titers by serologic neutralization test in experimental animals infected with Aujeszky's disease virus(ADV) isolated from Korea. The results of the experiments were summarized as follows. 1. We detected 2 pigs infected with ADV of 1000 in 1990 and 1 of 600 in 1991 by enzyme immunodiffusion method. 2. In histopathological findings of experimental animals inoculated ADV, the typical characteristics of Aujeszky's disease were not observed in pig, but edema and degeneration in the epidermis were observed in rats, vasculoendotheriosis, perivascular cuffing and cellular infiltration in the cerebrum were appeared in rabbits and perivascular cuffing and forcal infiltration of glial cells in the cerebrum were appeared in mice. 3. The increasing antibody titers(1 : 64) in the serological neutralization test were ascertained in 2 carrier pigs inoculated ADV. 4. Rabbits, mice and rats died all about 5 days after inoculation, but pigs and chickens didn't die. 5. In 1 cat and 2 rabbits inoculated with the Aujeszky's disease virus(ADV), the typical clinical findings of Aujeszky's disease were observed in rabbit, but not in cat and so we slaughtered without any signs of Aujeszky's disease.

• Korean Journal of Veterinary Research
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• v.29 no.4
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• pp.479-485
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• 1989

The present study was conducted to investigate the incidence of Pasteurella multocida infection in Youngnam swine herds during the period from March 1988 to February 1989 and some properties of the isolated organisms. P multocida was isolated from 22(43.1%) of 51 growing pigs of 4 to 12 weeks of age and from 8(80.0%) of 10 herds. From nasal turbinates of 102 slaughtered pigs, 47(46.1%) pigs were culture positive and pigs from 8(88.9%) of 9 herds were found to be infected with P multocida. From lungs of 101 slaughtered pigs, 42(41.6%) pigs were culture positive and the pigs from 11(91.7%) of 12 herds were found to be infected with P multocida. The majority of biochemical and cultural properties of the P multocida isolates were identical to those of the standard strains. The isolation frequencies of P multocida in relation to pig snout lesion grades of 0 to 5 were 28.6%, 41.6%, 48.0%, 50.0%, 85.7%, and 100%, respectively.

• Korean Journal of Veterinary Research
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• v.27 no.1
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• pp.153-155
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• 1987

Determination of cholinesterase activity is a routine practice in many laboratories to detect the influence of cholinesterase inhibiting drugs such as organophosphate and carbamate insecticides. Among many different methods to determine the cholinesterase activity, the present method was the most recent, simple and accurate one for routine test in clinics. The results obtained in sera of human and the different species of animals by means of the present method were as follows: $5.76{\pm}1.12U/ml$ in human, $3.37{\pm}0.83U/ml$ in german shepherd, $0.61{\pm}0.18U/ml$ in rat, $14.91{\pm}3.10U/ml$ in mouse, $1.55{\pm}0.51U/ml$ in chicken, $0.28{\pm}0.11U/ml$ in slaughtered cattle and $0.50{\pm}0.10U/ml$ in slaughtered pig.

• Korean Journal of Veterinary Research
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• v.39 no.1
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• pp.85-89
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• 1999

From 2,373 slaughtered pigs examined, 1,899 of them had visible evidence of pulmonary lesion. The lungs with pulmonary lesion were examined by grossly, histopathological technique to investigate the prevalence according to season, severity of pulmonary lesion, types of the pneumonia and relationship between rearing management and prevalence of pulmonary lesion. The results were as follows : 1. Prevalence of pneumonia according to season was 72.3% to 85.9% and the highest prevalence was in winter. 2. In the severity of pulmonary lesion, rates mild, moderate and severe lesions were 38.3%, 47.0% and 14.7%, respectively. Prevalence of mild lesion was the highest in autumn. Prevalence of moderate and severe lesions was the highest in winter. 3. In the type of pneumonia, rates of interstitial pneumonia and bronchopneumonia fibrinous pneumonia were 23.6%, 13.0%, and 3.4%, respectively. Prevalence of interstitial pneumonia was high in spring and autumn while that of broncho-pneumonia and fibrinous pneumonia was high in winter and summer, respectively. 4. In relationship of pulmonary lesions according to severity of pulmonary lesion and types of pneumonia, similarity was observed in prevalence of mild lesion and bronchopneumonia.

• Journal of Veterinary Clinics
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• v.22 no.4
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• pp.365-370
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• 2005

Enzootic pneumonia caused by Mycoplasma hyopneumoniae is responsible for major economic losses in pig herds of world wide. Mycoplasma hyopneumoniae can also act as a primary pathogen of porcine respiratory disease complex followed by bacterial or viral infection. This study was carried out to investigate the prevalence of mycoplasmal pneumonia of slaughtered pigs in Jeju for two years. The lungs and sera of 214 cases were examined for gross and microscopic lesions of the lungs, immunohistichemistry test for Mycoplasma hyopneumoniae antigen and enzyme-linked immunohistichemistry assay (ELISA) for serum antibody titer. Pulmonary consolidation was observed in the lungs of 163 pigs $(76.1\%)$ with average gross lesion score of $6.0\%$., Bronchointerstitial pneumonia was most frequently observed $(78.5\%)$. The incidence of pulmonary consolidation was decreased in vaccinated pigs compared to that of non-vaccinated pigs. The rate of consolidation in the lungs was significantly decreased in the vaccinated pigs (P<0.05). Antigen of Mycoplasma hyopneumoniae was identified by immunohistichemistry test in the lungs of 174 pigs $(81.3\%)$. ELISh antibodies to Mycoplasma hyopneumoniae were detected in 154 pigs $(72.0\%)$. These results showed the prevalence of swine pneumonia and the incidence of Mycoplasma hyopneumoniae in slaughtered pigs of Jeiu province. We expect that these results would be helpful for the control of swine mycoplasmal pneumonia and porcine respiratory disease complex in Jeju.

• Korean Journal of Veterinary Service
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• v.31 no.2
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• pp.219-227
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• 2008

Swine ascariasis is one of the major parasitic diseases to cause economic losses. This study was carried out to investigate the prevalence of Ascaris suum from slaughtered pigs and return the result to the farm (Feed - back). A total of 8,121 pigs (315 farms) were examined from January to November in 2007. The prevalence of farms detected with milk-spots was 42.9% (135 / 315 farms), and that of pigs with milk-spots was 7% (565 / 8,121 heads). Among 565 pigs with milk-spots, the pigs with grade 1 and grade 2 were 380 and 185, respectively. The percentage of pigs and farms detected with adult worm were 0.6% (45/8,121) and 7.3% (23/315) respectively. There was no statistical difference in affection rateamong seasons. The rate was 5.0% in spring, 8.8% in summer, 8.2% in autumn and 6.3% in winter. There was no enough difference in pig infection rate based on piggery type. The prevalence of milk-spots in stolic type and in sawdust one were 15% and 18.5%, respectively.