Newly emerging geminiviruses in Korea

Eui-Joon Kil,Chairina Fadhila,Vo Thi Bich Thuy,Aamir Lal,Samira Zarghami D.,Hee-Seong Byun,Chung-Kyoon Auh,Ji-Kwang Kim,Joong-Hwan Lee,Gwan-Seok Lee,Chang-Seok Kim,Hong-Soo Choi,Kyeong-Yeoll Lee,Sukch 한국응용곤충학회 2018 한국응용곤충학회 학술대회논문집 Vol.2018 No.10

Geminiviruses are plant-infecting viruses with monopartite or bipartite single-stranded circular DNA genomes. They are known to be mediated by insects such as whiteflies, treehoppers, leafhoppers or aphids and can cause devastating plant diseases in a wide range of economically significant crops worldwide. In Korea, occurrence of geminiviruses were reported officially after the 2000s. Although Honeysuckle yellow vein virus (HYVV) and Sweet potato leaf curl virus (SPLCV) were identified from honeysuckle and sweet potato in 2004 and 2006 respectively, these viruses did not spread and cause much concern for geminiviruses. In 2008, Tomato yellow leaf curl virus (TYLCV) that has caused severe tomato production loss in many subtropical and tropical countries was first reported in tomato plants cultivated in Tongyeong. TYLCV rapidly spread through the country and has been continuously reported from tomato cultivating areas in Korea. In addition to TYLCV, Tobacco leaf curl virus and Sweet potato golden vein associated virus have occurred. In recent years, new geminiviruses including Papaya leaf curl Guangdong virus (PaLCGdV) and Euphorbia leaf curl virus (EuLCV) have been introduced. Newly emerging geminiviruses from tropical and subtropical countries are due to increased demand for various fruits and vegetables, and climate change. In addition, there are reports that some geminiviruses including TYLCV can be transmitted by infected seeds. Therefore it is important to study on epidemiology of virus introduction and spread among the countries and within country.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

交通安全施設 投資政策에 關한 硏究

尹正吉,洪昌義,金萬培 建國大學校 社會科學硏究所 1997 社會科學論叢 Vol.2 No.-

■Background and purpose Traffic safety facilities is an important tool that it is contribute to traffic flow and safety instead of the roles of a traffic police or maneger in road. The current system for road traffic safety related facilities management is not in a satisfactory state, and more efficient system, therefore, is needed for the policy makers, researchers, and other people. This paper is to analyze the problem in the current system and to make suggestion to establish more efficient system. ■Contents · Analysis of the present road traffic safety facilities management system. - Functional allocation, financial resources, and future demand cost forecast · Case study in Japan. - Comparative analysis between Korea and Japan · Development of road traffic safety facilities management system. - Principles and alternatives for financial resources and functional allocation between central and local government ■Conclusions Traffic safety facilities should be maintained in the current system, in order to enhance operational capacity, secured proffessional manpower and utilized the third sector or RTSA(Road Traffic Safety Association). Also the future traffci safety facilities investment cost is to forecasted 3,400 hundred million won in the 2000 year, therefore is needed financial resources in centural government. In order to secure investment resources for traffic safety facilities should be given improvement plan of special account law

도로 종류별 안전도에 관한 연구 : 고속도로와 국도를 중심으로 Focussing the express highway and the national road

윤정길,홍창의,김만배 건국대학교 사회과학연구소 2000 社會科學論叢 Vol.24 No.-

The paper aims to compare the safety between highway and the national road in South Korea. I first of all,we will try to evaluate the accident rates by VEK(vehicle kilometers traveled) for the express highway and for the national road.All things being equal,each accident rate will tell which road is more safe. For the result of this paper, the accident rate, fatal rate, inury rate of the national road are respectively 4.5 times,2.0 times,3 times as hogh as that of express highway. In conclusion, the express highway is more safe than the national road though our method.

골수이형성 증후군과 합병된 임신에서 자궁파열 1 예

임병도(Byeong Do Lim),이혁우(Hyuk Woo Lee),주성홍(Sung Hong Joo),정의식(Eui Sik Jung),박창서(Chang Seo Park),조성진(Sung Jin Cho) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.2

Myelodysplastic syndrome (MDS) is a relatively uncommon hematological disorder, charactedzed by cytopenia in the peripheral blood and normo-or hypercellularity in the bone marrow with morphological dysplastic change. Ineffective hematopoiesis leads to hematological failures in this syndrome. MDS is largeIy affected in older individuaIs with a median age of 60-75. It's association with pregnancy is even rarer. Although the exact incidence of MDS in pregancy is unknown, it is likely to be less than 1 per 100,000 pregnancies annually. Recently, we experienced a case of MDS presented initially during pregnancy in a 34-year-old primipara and managed with intensive hematologic support. Uerine rupture occurred in pregnancy complicated with MDS at 34 gestation weeks and a healthy infant was successfully delivered by Cesarean section. We report this case with a brief review of the literature.

성인의 만성 기침에 대한 감별진단으로서의 백일해

박완범,박상원,이기덕,이창섭,장희창,김홍빈,김의종,오명돈,최강원 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

목적 : 백일해는 소아기에 발생하는 전염병으로 오랫동안 알려져 왔다. 그러나, 미국과 유럽에서는 1990년대에 들면서 성인에서도 백일해가 유행하며, 만성 기침 환자의 20% 정도가 백일해를 앓는 것으로 보고하고 있다. 저자들은 국내에서 성인 만성기침의 원인으로 백일해의가능성을 확인하고자 하였다. 재료 및 방법 : 2002년 9월부터 2003년 5월까지 서울의 일개 대학보건진료소 또는 일개 시립병원 외래를 방문한 환자 중 기저 폐질환 없이 1주 이상 기침을 하는 성인을 대상으로 Bordetetlla pertussis에 대한 배양검사와 중합효소 연쇄반응검사(PCR)를 시행하였다. 결과 : 1주 이상의 기침을 하는 성인 102명 중 배양검사에서 양성인 환자는 없었으나 3명(2.7%)에서 PCR 양성이었으며 이들 모두 3주 이상 기침이 지속되었고 백일해의 특징적인 증상을 호소하였다. 결론 : 국내에도 성인에서 백일해가 발생하고 있음을 확인하였고 따라서 성인 만성기침의 원인으로 백일해를 감별 진단해야 한다. Background : Pertussis was long considered a childhood illness. However, in the last two decades, it has been reported as a cause of prolonged cough in adolescents and adults in other countries. Infection of Bordetella pertussis was prospectively searched among adults with a persistent cough. Materials and Methods : Adult patients, who visited either the outpatient clinic of a municipal hospital or a university health service center due to cough of more than six days' duration without underlying pulmonary disease, from September 2002 to May 2003, were enrolled. The culture and polymerase chain reaction (PCR) were used for confirming of B. pertussis infection. Results : 102 adult patients with persistent cough were evaluated. 3 (2.9%) patients were PCR positive for B. pertussis. There were no patients with positive culture. All patients with positive PCR had one or more classic symptoms of pertussis and their cough persisted for 3-7 weeks. Conclusion : We confirmed the morbidity of pertussis in Korean adults with persistent cough. Pertussis should be considered as a differential diagnosis of chronic cough in adults.

국내 다기관에서 조사한 지역사회획득 메티실린내성 황색포도알균의 빈도와 임상적 특성

송진수,최평균,송경호,조재현,김성한,방지환,이창섭,박경화,박경운,신수,최희정,김의석,김동민,이미숙,박완범,김남중,오명돈,김의종,김홍빈,최강원 대한감염학회 2006 감염과 화학요법 Vol.38 No.6

목적 : 최근 전세계적으로 지역사회획득 메티실린내성 황색포도알균(community-associated methicillin-resistant Staphylococcus aureus, CA-MRSA)의 보고가 증가하고 있다. 하지만, 우리나라에서는 CA-MRSA 감염증에 대한 증례보고만 있을 뿐 아직까지 체계적인 연구결과가 없는 실정이다. 저자들은 국내에서 CA-MRSA의 빈도, 감염증의 임상적 양상, 분리된 균주의 항균제내성 양상을 조사하였다. 재료 및 방법 : 2005년 1월부터 2005년 6월까지 7개 병원에서 MRSA가 분리된 환자의 명단을 파악한 후 의무기록지와 건강보험심사평가원의 자료를 검토하였다. 외래나 응급실에서 혹은 입원 후 72시간 이내에 균주가 분리되고 MRSA 획득과 관련된 위험인자가 없는 경우 CA-MRSA로 정의하였으며, 분리된 균주의 임상적 의미에 따라 원인병원체(pathogen), 집락화(colonizer), 미결정(undetermined)으로 분류하였다. Penicillin과 oxacillin을 제외하고 3개 이상의 다른 계열 항균제에 내성이면 다제내성으로 정의하였다. 결과 : 연구기간동안 총 3,251주의 황색포도알균이 분리되었으며, 이 중 MRSA는 1,900주(58.4%)였다. MRSA 가운데 CA-MRSA는 114주(6.0%) 였으며, 이들이 분리된 부위는 귀(62주), 비뇨기계(14주), 피부 및 연부조직(11주), 호흡기계(10주), 혈액(3주) 등이었다. CA-MRSA 균주 가운데 집락균은 22주, 원인병원체는 22주였으며, 나머지 균주에 대해서는 그 임상적 의미를 결정할 수 없었다. 항균제 감수성 검사를 시행한 73균주 중 47주(64.4%)는 다제내성이었다. CA-MRSA 감염증 22예 중 피부 및 연부조직 감염(9예)과 중이염/외이도염(9예)이 가장 흔하였다. 침습적 감염증(invasive infection)은 4명(원발성 균혈증 3예, 감염성 관절염 1예)에서 확인되었지만, CA-MRSA 감염증으로 사망한 환자는 없었다. 결론 : 병원내 감염증에서는 MRSA가 심각한 문제이지만, 아직까지 지역사회 감염증에서 CA-MRSA는 흔하지 않았다. Background : Methicillin-resistant Staphylococcus aureus (MRSA) infection has emerged in patients who do not have the established risk factors. In Korea, little is known about the epidemiology and clinical features of community-associated MRSA (CA-MRSA). Material and Methods : Clinical microbiology laboratory databases of 7 hospitals were reviewed to identify the patients from whom MRSA was isolated during the period of January to July 2005. Only one isolate per patient was enrolled. In order to identify the risk factors of MRSA acquisition, the medical records and the Health Insurance Review Agency databases were reviewed. CA-MRSA was defined as MRSA isolated from patient without established risk factors. We analyzed patient demographics, underlying medical conditions, characteristics of infection, and antimicrobial susceptibility profiles. Results : Of total 3,251 S. aureus isolates, 1900 (58.4%) were MRSAs. Of the MRSA isolates, 114 (6.0%) were CA-MRSA. Of 114 CA-MRSA isolates, 22 (19.3%) were colonizers, 22 (19.3%) were pathogens, and the clinical significance of remaining 70 (61.4%) could not be determined. Median age of the 22 patients with CA-MRSA disease was 47 years. Nine patients had skin and soft tissue infections, 9 ear infections, 3 bacteremia, 1 septic arthritis. Seven patients had underlying medical disease. None died of the CA-MRSA infections. Of the 73 isolates of CA-MRSA, 47 (64.4%) were resistant to more than 3 classes of antibiotics besides β-lactams. Conclusion : Although MRSA is highly prevalent among hospital-associated S. aureus infection, CA-MRSA infections are not common.

A Case of Aplasia Cutis Congenita,Type Ⅴ

Hong, Chang Eui,Park, Wook Hwa,Chang, Sung Nam,Park, Min Soo,Youn, Mi Ra,Kim, Dong-Kun Korean Dermatological Association 1997 Annals of Dermatology Vol.9 No.1

Evaluation of the Mutagenic Properties of Two Lignans from Acanthopanax koreanum Nakai

Hong, Chang-Eui,Lyu, Su-Yun Korean Society of ToxicologyKorea Environmental Mu 2013 Toxicological Research Vol.29 No.4

Acanthopanax koreanum Nakai, a well known traditional herb grown in Jeju Island, South of Korea, has been used as a tonic and sedative agent, as well as in the treatment of diabetes and immune diseases. Mutagenicity of two lignans, syringaresinol and tortoside A isolated from A. koreanum, was assessed using Salmonella/microsome (Ames) test. Tester strains used were Salmonella typhimurium TA98, TA100, TA1535, and Escherichia coli WP2uvrA. The mutagenic activity was determined both in the absence or presence of S9 mixture. As a result, tortoside A did not cause any increase in the number of $his^+$ revertants in S. typhimurium and E. coli WP2uvrA strains in the presence or absence of S9 mix, compared to the controls. Similarly, low concentrations of syringaresinol (750 and 1,500 ${\mu}g$/plate) did not show any mutagenic properties in all bacterial strains, in the presence or absence of S9 mixture. However, in the high concentration of syringaresinol (3,000 ${\mu}g$/plate), the number of revertants were increased in TA1535 strains, in the absence of S9 metabolic activation. Therefore, in vivo experiments such as comet assay are needed to further determine the genotoxic/carciogenic potential of syringaresinol isolated from A. koreanum.

Rapid selection of astaxanthin-hyperproducing <i>Haematococcus</i> mutant via azide-based colorimetric assay combined with oil-based astaxanthin extraction

Hong, Min Eui,Choi, Hong Il,Kwak, Ho Seok,Hwang, Sung-Won,Sung, Young Joon,Chang, Won Seok,Sim, Sang Jun Elsevier Applied Science 2018 Bioresource technology Vol.267 No.-

<P><B>Abstract</B></P> <P>The aim of this work was to develop a new approach for simple and high-throughput selection of astaxanthin-hyperproducing <I>Haematococcus</I> mutants through a sequential combination method of azide-based colorimetric assessment and oil-based astaxanthin quantification. Randomly mutagenized cells were spotted on solid culture medium containing 50 µM of sodium azide to accelerate the biosynthesis of astaxanthin. After 3 days, highly-induced mutants were preliminarily isolated by visual inspection and their astaxanthin accumulations were rapidly quantified by soybean oil-based extraction method. On the whole, the selected mutants showed reduced vegetative growth rates but eventually exhibited higher astaxanthin productions than the parental strain owing to their improved inductive growths. Among them, M13 showed 174.7 ± 5.69 mg L<SUP>−1</SUP> of the highest astaxanthin production, which is 1.59-times higher than that of wild-type. This wide-scope screening method expedites both upstream and downstream astaxanthin quantification, making it a useful tool for isolating microalgae with high astaxanthin production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> NaN<SUB>3</SUB> was used for colorimetric selection of highly inducible <I>H. pluvialis</I> mutants. </LI> <LI> Soybean oil was used for rapid extraction and analysis of astaxanthin in the cells. </LI> <LI> 88.5% of the selected mutants showed improved astaxanthin productions. </LI> <LI> A selected mutant, M13, produced 174.7 mg L<SUP>−1</SUP> of astaxanthin in a 5 L PBR. </LI> <LI> Astaxanthin titer of the mutant increased 59% compared to that of the wild type. </LI> </UL> </P>