• 급식외식위생학회지
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• 제3권2호
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• pp.49-58
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• 2022

The objectives of this study were to investigate the behavior characteristics of pathogenic E. coli, Salmonella Typhimurium, Campylobacter jejuni, and Listeria monocytogenes in various kinds of meat (beef, chicken, and pork) and to compare their risk using FDA-iRISK. The growth of S. Typhimurium in chicken and pathogenic E. coli in pork and beef was well supported and posed a high risk. A similar trend was observed in the risk comparison results using the iRISK. When comparing total disability adjusted life years (DALY) per year based on the kinds of meat, chicken was the highest (88.2), followed by pork (58.5) and beef for "yukhoe" (18.8). When comparing scenarios grouped by bacteria, The highest total DALYs per year was observed with pathogenic E. coli (121), followed by S. Typhimurium (44.8) and L. monocytogenes (1.67E-³). These results indicate that the risk of combining meat and foodborne pathogens varies under the same distribution environment. Thus, strict management and supervision are required to store and deliver raw meat to prevent cross-contamination among the raw meats at the processing plant and retail market.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 1995년도 Proceedings of special lectures on Molecular Biological Approaches to Plant Disease National Agricultural Science and Technology Institute Suwon, Korea
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• pp.21-25
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• 1995

;Bacterial blight caused by Xanthomonas oryzae pv. Olyzae is one of the most important diseases of rice. Host resistance, which relies on single, dominant resistance genes, is the only reliable method to control the disease at present. Pathogenic variation of the bacteria has been shown to follow the deployment of resistance genes in commercial cultivars. Information on the factors and the mechanisms for genetic variation of this pathogen is limited. Further, we have no clear evidence of whether population variability is due to sexual recombination or to variation introduced by mutations or intragenic recombination in a clonally maintained population.(omitted)itted)

• 식물병연구
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• 제10권4호
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• pp.349-352
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• 2004

4품종(남도마늘, 고흥마늘, 단양마늘, 중국산 수입마늘)의 마늘추출액의 식물병원세균과 진균에 대한 항균효과를 조사하였다. 실내실험에서 마늘추출액은 그람양성세균, 그람음성세균, 진균 모두에 좋은 항균효과를 나타내었다. 본 연구에 사용된 4품종의 마늘추출액 중 남도마늘과 중국산 수입마늘이 보다 좋은 항균효과를 나타내었다. 그람양성세균인 Clavibacter michiganensis가 마늘추출액에 가장 민감하였으며, Burkholderia cepacia가 가장 저항성이 컸다. 마늘추출액을 이용한 오이 흰가루병에 대한 항균효과 포장실험에서는 59.7${\sim}$61.9%의 방제가를 보여주었다.

• 한국미생물·생명공학회지
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• 제35권3호
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• pp.210-219
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• 2007

본 연구는 제주도 자생식물 4종(Microlepia marginata panzer Christ., Prunella vulgaris. aleutica Fernald, Perilla-frutescens var. japonica Hara., Gleichenia japonica Spreng)을 부위별로 나누어 각 부위를 열수 추출하여 각 추출액을 농도별로 첨가하여 E. faecitum KCCM 12118, L. rhamnosus KCCM 32826, L. plantarum KCCM 11542, P. pentosaceus KCCM 40464 균종에 대한 생육조건 및 배양액을 가지고 어류 질병 미생물에 대한 항균활성 및 DPPH 라디칼 소거활성 및 Hydroxyl radical 소거활성을 조사하였다. 자생식물 추출액을 농도별로 첨가하여 4종의 lactic acid bacteria를 72시간 배양하면서 생육활성을 보았을 때 10%를 첨가하여 48시간 배양하였을 때가 가장 좋은 생육 조건임을 알 수가 있었으며, 또한 lactic acid bacteria 생육시 자생식물 추출물 첨가가 lactic acid bacteria 증식에 효과가 있음을 나타내었다. DPPH 라디칼 소거활성에서는 꿀풀 잎 추출물을 10% 첨가하여 배양하였을 때 합성 항산화제인 BHA(90%)와 BHT(81%) EDA를 비교하였을 때 BHA와 유사하거나 조금 높은 활성을 BHT보다는 높은 라디칼 소거활성을 나타내었다. Hydroxyl radical 소거활성은 5% 자생식물 추출물을 첨가한 배양액에서부터 BHT보다 높은 소거활성을 나타내기 시작하여 10%를 첨가한 배양액에서는 BHA보다 높은 소거 활성을 나타내었다.

• 상하수도학회지
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• 제23권3호
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• pp.339-344
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• 2009

The authors investigated the bacterial community attached to granular activated carbon(GAC) particles and the susceptibility of the community to chlorine disinfection. The study was carried out at the G Water Treatment Plant in Seoul, which was in full-scale operation. Bacteria attached to the surface of GAC increased gradually with treatment from $0.4{\times}106{\sim}8.5{\times}106 CFU/g$. TOC removal was under 1.0 mg/L due to increased bacterial community on the surface of GAC. It was found that TOC removal was closely related with physical and biological parameters such as pore volume and the number of attached bacteria. When the washed and the attached cells were disinfected with 1.0mg/L of chlorine for 1 hour, the washed cells with chlorination could be controlled, but the number of the attached cells increased gradually. The results suggest a possibility that the treatment and disinfection barriers can be penetrated and pathogenic bacteria may break into the drinking water supplying system.

• 식물병연구
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• 제23권2호
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• pp.89-98
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• 2017

Ralstonia solanacearum species complex (RSSC) causes bacterial wilt, and it is one of the most important soil-borne plant pathogenic bacteria. RSSC has a large host range of more than 50 botanical families, which represent more than 200 plant species, including tomato. It is difficult to control bacterial wilt due to following reasons: the bacterial wilt pathogen can grow inside the plant tissue, and it can also survive in soil for a long period; moreover, it has a wide host range and biological diversity. In most previous studies, scientists have focused on developing biological control agents, such as antagonistic microorganisms and botanical materials. However, biocontrol attempts are not successful. Plant-derived metabolites and extracts have been promising candidates to environmentally friendly control bacterial wilt diseases. Therefore, we review the plant extracts, essential oils, and secondary metabolites that show potent in vivo antibacterial activities (in potted plants or in field) against tomato bacterial wilt, which is caused by RSSC.

• 식물병연구
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• 제12권1호
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• pp.51-54
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• 2006

4종류의 식물 추출 오일(마늘, 생강, 계피, 레몬그라스)에 대한 실내 항균효과를 5종의 식물병원세균과 4종의 식물병원진균에 대해 조사하였다. 4종의 오일중 마늘오일과 계피오일의 항균효과가 우수하였다. 특히, 마늘오일은 식물병원세균인 Agrobacterium tumefaciens, Erwinia carotovora, Ralstonia solanacearum, Xanthomonas campestris와 식물병원진균인 Phytophthora infestans, Fusarium oxysporum, Collectotricum sp.에 대해 강한 항균력을 나타내었다. 그러나, Acidovorax avenae와 Pythium sp.에 대해서는 항균효과가 없었다. 마늘오일의 오이 흰가루병(Sphaerotheca fusca)과 토마토 흰가루병(Erysiphe cichoracearum)에 대한 포장 방제효과 실험결과 각각 70.0-74.6%와 71.2%의 방제가를 나타내었다.

• 한국동물위생학회지
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• 제44권1호
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• pp.45-49
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• 2021

A 23-month-old Holstein cattle showed excess salivation and reluctance of walking and suddenly died after forced sudden movements. Grossly, numerous fibrous adhesions were present within cranial abdominal cavity including the reticulum and diaphragm and thoracic cavity involving lungs, pericardial sac, and heart. A perforation made by a 10 cm-long sharp-ended wire was detected in the reticulum. Histopathologically, fibrous suppurative epicarditis and myocardial necrosis were observed. Fibrosis with neovascularization were found in lungs, spleen, and liver. And granulomatous reticulitis was observed. For differential diagnosis, no pathogenic bacteria were detected through microbiological tests and PCR results were also negative for bovine susceptible pathogenic antigens. Based on the gross and histopathological examination, we diagnosed this case as chronic traumatic pericarditis. Cattle are inquisitive and prone to swallow various kinds of metallic foreign bodies since they do not use their lips. Therefore, avoiding ingestion of metallic objects in animal feed and animal areas by careful environmental management of farms is required and farmers should give the adequate minerals and vitamins into the feeds not to lick or shallow foreign bodies in case of mineral deficiency. For veterinary practitioners, physical examination, blood tests, and diagnostic imaging (X-ray and Ultrasonography) are required for an exact diagnosis. Furthermore, placing the magnets in rumen would be effective for prophylactic administrations.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.71.1-71
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• 2003

Most major plant pathogenic bacteria in Korea belong to Xanthomonas spp.. Xanthomonas oryzae pv. oryzae is a major pathogen in rice, X. campestris pv. vesicatoria in pepper, X. axonopodis pv. giycines in soybean, X. campestris pv. campestris in cabbage, and X. axonoposid pv. citri in tangerin. Host specificity of the bacterial pathogen depends on the avirulence gene in the pathogen and the corresponding resistance gene in host plants. Many avirulence genes in bacteiral pathogen located on the native plasmids. However, the presence of the native plasmids in Xanthomonas spp. was not investigated well. In order to study the host specificity, we isolated native plasmids from Xanthomonas spp. and compared those plasmids each other, The presence of the native plasmids and the characteristics of the plasmids depended on the bacterial strains. In the X. axonopodis pv. glycines, most strains carried native plasmids but some strains did not. Some strains carry about 60 kb native plasmids including 3 different aviurlence genes. We will discuss the characteristics of the native plasmids isolated from the Xanthomonas spp.

• 식물병연구
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• 제6권1호
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• pp.6-9
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• 2000

1998년 수원, 성남, 양재, 대전의 비닐하우스에서 재배되고 있는 인삼고무나무(Ficus retusa), 황금대만고무나무(Ficus retusa \`Golden leaf\`), 벤자민고무나무(Ficus benjamina)에 새로운 세균병이 관찰되었다. 인삼고무나무의 뿌리에 무름증상을 보이는 세균병을 \"P.cichorii\"에 의한 인삼고무나무의 세균성뿌리썩음병\", 황금대만고무나무와 벤자민고무나무에 마름증상을 보이는 세균병을 \"P.viridiflava에 의한 황금대만고무나무와 벤자민고무나무의 세균성잎마름병\"으로 명명할 것을 제안한다.마름병\"으로 명명할 것을 제안한다.제안한다.