• 대한수의학회지
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• 제40권3호
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• pp.587-599
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• 2000

This study was conducted to observe the severity of the disease and pathogenecity of Babesia gibsoni parasite on the splenectomized dogs(SPD) and nonsplenectomized(intact) dogs (NSPD) experimentally infected with B gibsoni. The average prepatent period was 4 days in the SPD and 8 days in the NSPD, respectively. Peak parasitaemia(PE) ranged from 26% to 34% of erythrocytes infected in the SPD and from 4% to 5% in the NSPD. Latent parasitaemia was still detectable 40 days as low as under 1.0% of erythrocytes infected after the initial parasitaemia in the SPD. Blood packed cell volume(PCV) decreased to as little as 6.4% to 6.9% in the SPD. The clinical signs were mild fever and anemia in the NSPD, remissions and exacervations of temperature, intermittent or spike-like increases of temperature, progressive polychromatophilic macrocytic anemia with anisocytosis, icterus, marked loss of appetite, rarely haemoglobinuria, and deep brown-yellowish urine in the SPD. Gross pathologic changes mainly involved slightly enlargement of liver and spleen in the NSPD and marked enlargement of liver in the SPD. Anatomic changes associated with the disease included diffuse periportal and centrilobular hephatitis, and membranoproliferative glomerulonephritis. Hyaline droplets, resulting protein metabolic alterations, were found in the convoluted ephithelium of the kidney. The density of lymphocytes within the liver sinusoids was markedly increased. Aggregates of large monocytes and macrophages were demonstrated in the centrilobular veins of the liver. The density of these cells in the centrilobular veins were greatest in the SPD. The forms of B gibsoni parasite found in the acute stage of SPD were large signet ring form, small signet ring form, pyriform, elongated form, comma form, head-phone form, oval form, peared form, racket-like form, amoeboid form, triangle form, quartered form, dot form, band form and multiple, and rosette form, et al. The severity of the disease and pathogenecity of B gibsoni parasite were mild in the NSPD but fatal in the SPD.

• 미생물학회지
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• 제9권2호
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• pp.69-73
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• 1971

On June in 1970 the authors discovered a pathogenecity, cytoplasmic polyhedrosis virus, of the Smithia virus in the larvae of Liparis dispay L. appeared on quercus forest in Chung-Neung district and had carried out a experiment to detect the pathogenecity of Smithia virus through the inoculation of it into the larvase, such as Liparis dispay L. Hyphantrea cunea DRURY, and Dendrolinus spectabilis BUTLER. The results obtained were as follows ; 1) Death rate of L.dispay and D.spectabilis treated by 10$^{6}$ /ml cytoplasmic polyhedrosis virus of Smithis virus were 88.0% and 85.5% respectively, when the larvaes of these insects are big enough. But there were none of pathogenecity in case of Hyphantrea cunea DRURY. 20 Dead larvae caused by the injection of Smithia virus had begum to find out about on 10 days after inoculation. Miximum death rate of L. didpay and D. spectabilis appeared on 20-25days nad on 25-30days, respectively, after the incoulation. 3) In the cytoplasm of Mid-gut cylindrical cells of both of these insects, polyhedrosis, such s hexagonal (0.5-2.0-6.0 micron) were found out and in these insects, polyhedrosis, such as hexaginal (0.5-2.0-6.0 mivton) were found out and in case of D.spectabilis were a few polyhedrosis, such as tetragonal, trianglar polyhedrosis. 4) Diluted concentration of `0$^{6}$ /ml cytoplasmic polyhedrosis virus of Smithia virus were spread out in the field conditions. The corrected mortality was confirmed as about 87.8%.

• 한국미생물·생명공학회지
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• 제22권3호
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• pp.246-251
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• 1994

Pseudomonas syringae pv. tabaci(Pa45) Tox$^{-}$ cells were infected with phage Ps90 strain isolated form the natural source, and the Ps90 lysogenized bacterial cells were then obtained. The lyxohenized cells produced tabtoxin and the phage induction occured when the cells treated with mitomycin C. The Southren hybridization alnalysis of the four EcoRI-treated plasmid fragments and the EcoRI-digested genomic DNA of Tox$^{+}$ and Tox$^{-}$ strains using phage DNA as a probe showed that only those DNA fragment of Tox$^{+}$ strain were related to the Ps90 phage DNA. Based on these results, the tabtoxin producing DNA fragments of the bacteris are presumed to have originated from the same phage DNA, and to be responsible for the pathogenecity of the bactrial strains.

• 한국미생물학회:학술대회논문집
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• 한국미생물학회 2005년도 International Meeting of the Microbiological Society of Korea
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• pp.172-172
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• 2005

• 한국어병학회지
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• 제28권3호
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• pp.145-155
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• 2015

The pathogenecity of atypical Aeromonas salmonicida was studied in healthy Oreochromis niloticus. Inoculum at concentration of $1.5{\times}10^8CFU/ml$ and $3{\times}10^8CFU/ml$ was injected into healthy fish through intramuscular and intraperitoneal injections. Experimentally infected Oreochromis niloticus showed ulceration at the dorsal musculature and trunk region in addition to black coloration, congested gills, exophthalmia, and ocular hemorrhage. Congested liver and kidney were recorded in post-mortem examination. Mortality of the experimentally infected Oreochromis niloticus reached 100% after intramuscular injection at concentration of $3{\times}10^8CFU/ml$. Histopathological investigation of infected organs was also performed. There was a focal area of bundles of skeletal musculature showing hyalinization. In addition, hyperplasia, congestion, and fusion were noticed in the gill lamellae. There was also congestion in the blood vessels in the ocular chamber. Severe congestion was also noticed in the central vein of liver associated with focal aggregation of the melanin pigmented cells in the parenchyma. Degenerative changes were noticed in the epithelial cells lining of kidney tubules. Plant extracts carvacrol and its biological precursor cymene were found to be effective in treating experimentally infected Oreochromis niloticus at concentration of 100 or 200 ppm.

• 대한수의사회지
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• 제15권3호
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• pp.149-155
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• 1979

One hundred and fifteen strains of Escherichia coli were isolated' from suckling piglets of sow fed on food-garbage and their hemolytic property on horse red blood cells, necrotizing activity in rabbit skin and inflammatory activity in rabbit intestine by

• 한국잠사곤충학회지
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• 제24권1호
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• pp.32-38
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• 1982

본시험은 솔잎혹파리의 미생물학적 방제대책의 일관으로서 미생물의 분리동정과 병원성을 연구 조사하고자 행하여졌다. 1. 솔잎혹파리의 유충에서 분리동정 된 균은 Verticillium psalliotae, Aureobdsidium pullulansa, Streptomyces sp., Aspergillus sp.(2종), Ascochyt, sp.의 6종이었으며 6종 전부가 병원성이 있었다. 2. 추기 양잠농가로부터 Spicaria pracina, Isaria farinosa, Oospora destructor, Aspergillus oryzae, A. flavus의 5종의 누에 경화병균을 분리 동정하여, 솔잎혹파리유충에 대한 병원성을 검정한 결과, 5종 전부가 강력한 병원성을 나타내었다. 3. 솔잎혹파리 유충에서는 29종의 colony가 나타났으며 그 중에서 Bacillus 계통이 11, coccus 계통이 9개로 구분되었으며, 현재 병원성검정은 진행 중에 있으나 No.4와 No.9-1균주는 병원성이 인정되었다.

• 식물병과 농업
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• 제5권2호
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• pp.119-121
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• 1999

A destructive collar rot of safflower occurred severely research farm of at Kyongsangnam-do Agricultural Research and Extension Services in 1999. Incidence of the disease at 3 fields in Chinju was ranged from 21.6 to 34.2% Upper parts of infected stems were mostly blighted and white mycelia were found on the lesions. The same fungus was isolated consistently from the infected tissues and confirmed its pathogenecity to safflower. The causal fungus of collar rot disease was identified as Sclerotium rolfsii by the examination of colony type sclerotium formation and pathogenicity test. This fungus also causes stem rot crown rot wilt or blight on the safflower. This is the first report on the collar rot of safflower caused by Sclerotium rolfsii in Korea.

• 식물병연구
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• 제7권3호
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• pp.145-149
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• 2001

2000년 5월 경북 경산시 진량읍 대구대학교에 소재하는 등나무에 암종이 심하게 형성되어 있음을 발견하였다. 병원체를 분리하고 얻어진 병원세균으로 병원성을 확인한 후 동정을 행하였다. 그 결과 병원세균은 일반 세균학적 성상 및 병원성에 의하여 Pantoea agglomerans pv. milletiae로 동정이 되었으며 이 병은 우리나라에서 처음 보고되는 것으로서, 이들 병원세균에 의한 그 병명을 "등나무혹병'이라 명명하기를 제안한다.제안한다.

• 한국잠사곤충학회지
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• 제20권2호
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• pp.36-39
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• 1978

생물검정결과의 분석에 있어서 약량일반응곡선과 반치사농도의 추정법으로 Probit 변환법이 널리 사용되어왔으나 산출과정이 복잡하고 변환식의 계산이 매우 어려운 관계로 계산이 쉽고 간편한 Logit 법을 사용하여 잠체의 핵다각체 바이러스의 흰불나방에 대한 병원성 조사결과를 분석하여 Probit 법에 의 한 분석결과와 비교하였다. 위의 두가지 추정방법에 의한 사충율과 반치사약량의 계산결과 계산법간에 차이를 인정할 수 없었으므로 계산이 간편한 Logit 법이 금후의 생물검정결과의 해석에 도움이 될 것으로 생각된다.