• Journal of Microbiology and Biotechnology
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• 제17권6호
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• pp.968-978
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• 2007

A pathogenic nematode, Butlerius sp., was isolated from Oriental beetle, Blitopertha orientalis. The infective juveniles exhibited dose-as well as time-dependent entomopathogenicity on the larvae of B. orientalis. Two bacterial species, Providencia vermicola (KACC 91278) and Flavobacterium sp. (KACC 91279), were isolated from the infective juveniles and identified. P. vermicola outnumbered Flavobacterium sp. in the nematode host, in which the colony density of P. vermicola was found to be 21 times higher than that of Flavobacterium sp. However, when the two bacterial species were cocultured in culture media without the nematode host, they showed similar growth rates. Both bacteria induced significant entomopathogenicity against Spodoptera exigua larvae infesting economically important vegetable crops, where P. vermicola was more potent than Flavobacterium sp.

• Journal of Yeungnam Medical Science
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• 제34권1호
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• pp.140-145
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• 2017

Glomerulonephritis (GN) is sometimes associated with infective endocarditis (IE). Bartonella endocarditis is difficult to diagnose because it is rare and cannot be detected by blood culture. This is the first report of cytoplasmic anti-neutrophil cytoplasmic antibody-positive subacute endocarditis-associated GN caused by Bartonella infection in South Korea. A 67-year-old man was hospitalized due to azotemia. He complained of weight loss and anorexia for 6 months. A diagnosis of IE was made based upon echocardiographic detection of vegetations on the mitral and aortic valves and a Bartonella antibody titer of 1:2,048. Renal histology identified focal crescentic GN. Azotemia and proteinuria improved after doxycycline and rifampin treatment combining with steroid therapy.

• Journal of Chest Surgery
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• 제25권10호
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• pp.1055-1060
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• 1992

Clinical experience of 21 patients with infective endocarditis was reviewed. Endocarditis involved the left-sided valve in 16 cases, the right-sided valve in 2, and PDA in the remaining 3 patients. Valve abnormalities included leaflet perforation in 9 patients, chordal rupture in 2,; annular abscess in 6; and aorticoleft atnal perforation in 2. Sixteen patients underwent valve replacement[aortic valve replacement in 7 patients, mitral replacement in 4 and double valve replacement in 5], two had VSD closure with pulmonary valve excision, three had ductus arteriousus closure. The patients were classified into two groups. I ] Healed endocarditis group: including the patients who had completed a planned cou-rseof antibiotic therapy[N=10], II ] Active endocarditis group: patients in which operations were performed prior to completetion of antibiotic treatment course[N=11]. The indications for operation included congestive heart failure, embolism, and persistent sepsis. Organisms were predominantly streptococcus[N=5] and staphylococcus [N=4] followed by candida, moraxella, and E-coli. By NYHA functional classification, all patients were in Class III or IV preoperatively. There was only one operative mortality in patient from group II. All patients substantially, improved postoperatively with NYHA classification in class I or II. This study shows that early surgical intervention in patients with active endocarditis has desirable outcome.

• Journal of Chest Surgery
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• 제46권4호
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• pp.285-288
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• 2013

Prosthetic valves are being widely used in the treatment of heart valve disease. Prosthetic valve endocarditis (PVE) is one of the most catastrophic complications seen in these patients. In particular, prosthetic valve dehiscence can lead to acute decompensation, pulmonary edema, and cardiogenic shock. Here, we discuss the medical management of late PVE in a patient with a prior history of late and redo early PVE and recurrent dehiscence. According to the present case, we can summarize the learning points as follows. A prior history of infective endocarditis increases the risk of relapse or recurrence, and these patients should be evaluated very cautiously to prevent late complications. Adequate debridement of infected material is of paramount importance to prevent relapse. A history of dehiscence is associated with increased risk of relapse and recurrent dehiscence.

• Journal of Plant Biology
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• 제6권2호
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• pp.9-21
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• 1963

A mosaic diseased radish collected from the suburb of Seoul, in November, 1961 was used for studing the host range, physical properteis, purificaitiion, insect transmission, and electron microscopy. A Japanese strain of radish mosaic(RPV) was also used with Korean strain of radish mosaic (KRMV) for a comparative study. The two viruses, KRMA and RPV, were identified by the difference in host range, insect transmission and electron microscopy. The KRMA was severely infective on tobacco and Nicotiana glutinosa, while on Gomphrena globsa was immune to the virus. RPV produces necrotic local lesions on Gomphrena globosa but did not infect tobacco and N. glutinosa. Among varieties of radish, Seoul, Akamaroo, Akanagea, Koong-Joong showed more severe symptoms than Simoo, Minong, Paek-soo, which appeared to be fainly resistant. In a number of tests, it was found that the virus KRMA retained its infectivity until to a dilution of 1:2,000, heating at $58^{\circ}$ for 10 minutes, adn aging in vitro for 7 days at room temperature. The RPV was not inactivated until it was diluted to 1:2,000, heated to $56^{\circ}$, and aged for 6 days. The KRMV was readily transmitted by the aphid(Myzus persicae Sulz). The virus RPV was not transmitted by the aphid in a number of tests. Partialy purified viruses using ammonium acetate buffer, salting-out by ammonium sulfate and centrifugation of high and low speed were highly infective. Electron micrographs showed that the KRMV paticles are of spherical particles whereas the RPV particles are rod-shaped.

• Journal of Plant Biology
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• 제6권2호
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• pp.7-7
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• 1963

A mosaic diseased radish collected from the suburb of Seoul, in November, 1961 was used for studing the host range, physical properteis, purificaitiion, insect transmission, and electron microscopy. A Japanese strain of radish mosaic(RPV) was also used with Korean strain of radish mosaic (KRMV) for a comparative study. The two viruses, KRMA and RPV, were identified by the difference in host range, insect transmission and electron microscopy. The KRMA was severely infective on tobacco and Nicotiana glutinosa, while on Gomphrena globsa was immune to the virus. RPV produces necrotic local lesions on Gomphrena globosa but did not infect tobacco and N. glutinosa. Among varieties of radish, Seoul, Akamaroo, Akanagea, Koong-Joong showed more severe symptoms than Simoo, Minong, Paek-soo, which appeared to be fainly resistant. In a number of tests, it was found that the virus KRMA retained its infectivity until to a dilution of 1:2,000, heating at $58^{\circ}$ for 10 minutes, adn aging in vitro for 7 days at room temperature. The RPV was not inactivated until it was diluted to 1:2,000, heated to $56^{\circ}$, and aged for 6 days. The KRMV was readily transmitted by the aphid(Myzus persicae Sulz). The virus RPV was not transmitted by the aphid in a number of tests. Partialy purified viruses using ammonium acetate buffer, salting-out by ammonium sulfate and centrifugation of high and low speed were highly infective. Electron micrographs showed that the KRMV paticles are of spherical particles whereas the RPV particles are rod-shaped.

• Parasites, Hosts and Diseases
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• 제45권4호
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• pp.295-299
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• 2007

The purpose of this study was to investigate whether sporulated Neospora caninum oocysts, which had been stored for 46 mo in a 2% sulfuric acid solution at $4^{\circ}C$, remain morphologically viable and infective to gerbils (Meriones unguiculatus). Six gerbils were orally inoculated with doses of 400 or 1,200 oocysts. Two mo after inoculation, the animals did not show any clinical signs, had no histological lesions, and were seronegative for N. caninum at 1:50 in an immunofluorescent antibody test. PCR using the brain from each gerbil did not reveal N. caninum specific DNA. We conclude that oocysts preserved for 46 mo are not infective, despite being morphologically intact.

• The Korean Journal of Legal Medicine
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• 제42권4호
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• pp.153-158
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• 2018

Staphylococcus aureus is an important cause of human infections, and it is also a commensal that colonizes the nose, axillae, vagina, throat, or skin surfaces. S. aureus has increasingly been recognized as a cause of severe invasive illness, and individuals colonized with this pathogen are subsequently at increased risk of its infections. S. aureus infection is a major cause of skin, soft tissue, respiratory, bone, joint, and endovascular disorders, and staphylococcal bacteremia may cause abscess, endocarditis, pneumonia, metastatic infection, foreign body infection, or sepsis. The authors describe a case of a fisherman who died of sepsis on a fishing boat during sailing out for fish. The autopsy shows paravertebral abscess, pus in the pericardial sac, infective endocarditis with vegetation on the aortic valve cusp, myocarditis, pneumonia and nephritis with bacterial colonization, and also liver cirrhosis and multiple gastric ulcerations.

• 정보보호학회논문지
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• 제20권2호
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• pp.33-41
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• 2010

중국인의 나머지 정리에 기반한 RSA-CRT 알고리즘은 오류 주입 공격에 취약하다는 점이 실험적으로 검증되었다. 본 논문에서는 RSA-CRT 알고리즘에 대한 현재까지의 오류 주입 공격 방어 대책을 분석하고 최근 제시된 Abid와 Wang이 제안한 대응 방법의 취약점을 분석한다. 이를 바탕으로 이중 멱승과 오류 확산 기법을 사용한 오류 주입 공격 대응책을 제시한다. 논문에서 제안한 방식은 오류 확산용 검증 정보를 이중 멱승 기법을 이용하여 효율적으로 계산하도록 하였으며 수동적 부채널 공격인 단순 전력 분석 공격과 (N-1) 공격에 강한 멱승 알고리즘을 개발하였다.

• Journal of Chest Surgery
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• 제40권5호
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• pp.341-350
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• 2007

배경: 조기진단과 적극적인 수술치료에도 불구하고 감염성 심내막염의 수술은 여전히 높은 사망률과 합병증을 보이고 있다 저자들은 감염성 심내막염으로 수술을 받은 환자들의 중단기 성적과 함께 원인균주에 따른 임상양상, 합병증과 수술사망의 위험인자, 특히 광범위 절제 및 심기 저부 재건술과 같은 보다 적극적인 수술법이 사망률과 이환율에 어떠한 영향을 미치는지 알아보기 위해 된 연구를 시행하였다. 대상 및 방법: 1995년 1월부터 2006년 6월까지 감염성 심내막염으로 진단되어 수술을 받은 79명의 성인 환자를 대상으로 시행하였다. 자가판막 심내막염이 63명이었고 인공판막 :감염은 16명이었다. 침범된 판막으로는 승모판 29예(36%), 대동맥판막 27예(34%), 승모판-대동맥판막 동시 침범 17예(21.5%) 삼첨판 3예, 폐동맥판막 3예였다. 균 동정이 안 되었던 경우가 27예(34.17%)였고 연쇄상 구균이 26예, 포도상 구균이 15예 기타 11예였다. 13예(16.5%)에서 판막 성형술을, 66예(82.9%) 에서 판막치환술을 시행하였는데 10예의 동종이식을 포함한 26예에서 조직판막이 사용되었고 40예에서는 금속판막이 사용되었다. 판막 성형 혹은 치환과 더불어 총 28예(35.4%)에서 대동맥 근부 치환 혹은 재건, 심기저부 재건, 농양배제술(abscess exclusion)과 같은 보다 더 침습적인 수술이 병행되었다. 결과: 조기사망은 4명(5.1%)이 심부전, 폐렴, 급성호흡부전 증후군, 범발성 혈관 내 응고장애로 사망하였으며, 2명이 외래관찰기간 중 만기 사망하였다. 2명에서 심내막염이 재발하여 2.6%의 재발률을 보였다. 포도상 구균에 의한 감염, 응급에 준하는 수술, 활동성 심내막염 상태에서 수술한 경우가 단일변량 분석에서 술 후 사망 및 주요 합병증 발생에 영향을 미치는 것으로 나타났다. 감염조직의 광범위 절제 후 필수 불가결한 보다 더 침습적인 재건술 및 근부치환의 시행 여부는 술 후 사망률에 영향을 미치지 않았고 주요 조기 합병증의 발생과도 무관하였다(p=0.51). 배양 음성인 경우 사망 및 주요 합병증 발생에 영향을 미치지 않았고 침범하는 판막의 종류(인공판막 대 자기판막)도 통계적으로 유의성이 없었다. 걸론: 감염성 심내막염에 있어 수술 전 진단 및 내과적 치료 과정에 많은 주의를 기울여야 하며 수술의 적응증이 된다면 환자의 임상적 상태가 악화되기 전 시점에 외과적 치료가 이루어져야 술 후 결과가 향상될 수 있을 것으로 판단된다. 침습적인 재건술이나 근부치환을 적용하더라도 술 후 사망률 및 주요 합병증 발생에 통계적 유의성을 보이지 않으므로 보다 적극적인 감염원의 제거와 해부학적 재건이 요구된다.