• Korean Journal of Veterinary Service
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• v.18 no.2
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• pp.103-112
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• 1995

Seasonal incident rates were examined from the 981 pigs slaushtered in southern Kang-won and distribution of lesions and histopathological examination were conducted from 231 Enzootic pneumonia affected lungs. The results obtained were summarized as follows： 1. 39.7∼50.2% of 981 slaughtered pigs showed pneumonia lesions without seasonal variation and the incidence rate of Enzootic pneumonia was 23.5% 2. The distribution of Lesions of Enzootic pneumonia lobes was observed. The right lobes were affected more frequently than the left, and the highest frequency of 79.7% being recorded in the right cardiac lobe followed by the left cardiac, right apical, intermediate, left apical, right diaphrogmatic and diaphrogmatic. 3. In histopatological observation lung lobes were forming Iymphonodulus from perivascular, peribronchiolar Iymphoid hyerplasia and it was remarkable to bronchostenosis.

• Journal of the korean veterinary medical association
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• v.9 no.3
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• pp.51-55
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• 1965

• Journal of the korean veterinary medical association
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• v.33 no.4
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• pp.239-244
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• 1997

• Korean Journal of Veterinary Research
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• v.8 no.1
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• pp.18-23
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• 1968

Pathological studies on the Enzootic Pasteurellosis of domestic rabbits were performed and discussed. The chief pathological findings were as follows: Grossly, pneumonic lesions were located mainly in apical and cardiac lobes. The lesions were well demarcated with unaffected surrounding tissue. The pleural surface of pneumonic lesions were usually appeared as yellowish~white fibrinous exudate and, in some cases, abscesses were also shown. Microscopically, various cellular exudates composed mainly of neutrophils, large monocytes and lymphocytes were observed in the alveolar spaces. Some alveolar spaces were filled mostly with fibrinous exudates. Occasionally, thrombosis accompanied with infarcts were encountered in pneumonic lesions. There were deposition of purulo-fibrinous exudates on the visceral pleura.

• Proceedings of the Korean Society of Veterinary Pathology Conference
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• 2003.10a
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• pp.50-50
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• 2003

Enzootic bovine leukosis(EBL) is chronic disease caused by bovine leukemia virus(BLV), retroviridae. The characteristic feature of this disease is proliferation of lymphocytes in circulating blood or lymphoid tissues. Because EBL concern lymphocytes, immunological disorder or alteration in the lymphocyte subpopulation is suggested. In this study, we investigated the changes of the lymphocyte subpopulation in the circulating blood of Korean native cattle infected with bovine leukemia virus. (omitted)

• Korean Journal of Veterinary Service
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• v.23 no.3
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• pp.255-262
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• 2000

A survey on pneumonic lungs and its histopathological changes of the slaughtered pigs from the southern area of Chungbuk province was carried out during the period from January to December 1999. Pneumonic lungs were attempted bactenological findings and antibiotic susceptibilities. The results obtained were as follows; 1. Of 158 slaughtered pigs, 97(61.4%) pigs had pneumonic lesions in the lung, and the prevalence was high in winter, spring, autumn, and summer in order. f. The bacteria isolated from pneumonic lesions were pasteurella spp, 13 heads(34.2%), streptococcus spp, 6(IS.8%), actinobacillus spp, 3(7.9%), coliform 4(10.5%) and the other bacteria, 12(31.6%). 3. These isolates were highly susceptible to the antibiotics of enrofloxacin 30(78.9%), cephalothin 23(73.6%) and ceftiofur 27(71 %). 4. Histopathologically, swine enzootic pneumonia and pleuropneumonia lesions were observed. The swine enzootic pneumonia lesions were consisted of peribronchiolar lymphoid hyperplasia and exudate in alveolar lumen. The pleuropneumonia lesions were consisted of thrombosis, alveolar wall thickened by mononuclear cells and neutrophil deposition.

• Korean Journal of Veterinary Service
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• v.23 no.2
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• pp.113-124
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• 2000

A total of 500 sera and lungs of slaughtered pigs were examined to investigate antibody titer, prevalence of pulmonary lesion, and interrelation among lung lesion score, type of pulmonary lesion and antibody titers by ELISA. The results obtained were as follows ; 1. The highest distribution of antibody titer was showed at 20 - 80 in M hyopneumoniae, 160-640 in P multocida type A and 160 - 640 in A pleuropneumoniae serotype 2 and 5. 2. The prevalence of pulmonary lesions was 84.0%, mean pulmonary lesion and mean lung score listed as 24.0$\pm$19.8% and 2.5$\pm$1.6, respectively. 3. In the prevalence of type of pulmonary lesion, enzootic pneumonia, pleuropneumonia and pleuritis were 58.2%, 10.0% and 15.8%, respectively. 4. Lung lesion score and type of pulmonary lesion were not interrelated with the distribution of antibody titer to specific pathogens, and causative pathogens of respiratory diseases were complicated with various bacteria.

• Proceedings of the Korean Society of Veterinary Pathology Conference
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• 2004.10a
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• pp.45-45
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• 2004

• Korean Journal of Veterinary Research
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• v.30 no.3
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• pp.343-348
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• 1990

Total 51 calves born from both 28 seropositive and 23 seronegative dams were subjected to study both prenatal and postnatal infections of bovine leukemia virus (BLV), and the duration of passive colostral antibody by means of immunodiffusion (ID) test. All calves were tested for precolostral and postcolostral periods by 16 months of age. The results were as follows: 1. Of 28 precolostral sera of the calves born from infected dams, one appeared positive, indicating in utero BLV infection from the dam. 2. BLV-antibody test for the postcolostral sera of the calves born from seropositive or seronegative dams showed that the colostral antibody of the calves disappeared from 2 to 6 months of age, and the increase of the number of seropositive calves initiated from 3 to 4 months of age indicated postnatal infection.

• Korean Journal of Veterinary Service
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• v.22 no.2
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• pp.121-128
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• 1999

The present study was conducted to investigate the incidence of pneumonic lesions with special regard to enzootic pneumonia and the microbiology of pneumoic lungs from 544 slaughter pigs during the period from October 1995 to September 1996. The incidence of enzootic pneumonic lesion was 76.3% (41s/s44) and pleurisy was detected from 7.9% of slaughter pigs. Seasonal prevalence of pneumonic lesions in slaughter pigs were in order of prevalence of 82.9% in spring, 76.8% in winter, 74.8% in autumn and 69.0% in summer, respectively. Pasteurella multocida, Streptococcus sp, Str suis, Corynebacterium sp, Actinobacillus pleuropneumoniae, Hemophilus parasuis, and Klebsiella pneumoniae were detected in order of prevalence from 16.9%, 15.9%, 7.5%, 6.0%, 1.4%, 1.0% and 0.5% of 415 pneumonic lungs, respectively. P multocida were susceptible to oxytetracycline, polymyxin-B, streptomycin, and vancomycin, while the majority of them were resistant to amoxicillin, ampicillin, cephalothin, kanamycin, and penicillin-G. Str suis were susceptible to amoxicillin, ampicillin, cephalothin, penicillin-G, although the majority of them were resistant to erythromycin, oxytetracycline, streptomycin, vancomycin. A pleuropneumoniae were susceptible to ampicillin, and cephalothin, but the majority of them were resistant to oxytetracycline.