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Youn-Kyoung Goo,Won-Sik Shin,Hye-Won Yang,So-Young Joo,Su-Min Song,Jae-Sook Ryu,Won-Myung Lee,Hyun-Hee Kong,Won-Ki Lee,Sang-Eun Lee,Won-Ja Lee,Dong-Il Chung,Yeonchul Hong 대한기생충학열대의학회 2016 The Korean Journal of Parasitology Vol.54 No.1
This study explored epidemiological trends in trichomoniasis in Daegu, South Korea. Wet mount microscopy, PCR, and multiplex PCR were used to test for Trichomonas vaginalis in vaginal swab samples obtained from 621 women visiting 2 clinics in Daegu. Of the 621 women tested, microscopy detected T. vaginalis in 4 (0.6%) patients, PCR detected T. vaginalis in 19 (3.0%) patients, and multiplex PCR detected T. vaginalis in 12 (1.9%) patients. Testing via PCR demonstrated high sensitivity and high negative predictive value for T. vaginalis. Among the 19 women who tested positive for T. vaginalis according to PCR, 94.7% (18/19) reported vaginal signs and symptoms. Notably, more than 50% of T. vaginalis infections occurred in females younger than 30 years old, and 58% were unmarried. Multiplex PCR, which simultaneously detects pathogens from various sexually transmitted infections, revealed that 91.7% (11/12) of patients were infected with 2 or more pathogens. Mycoplasma hominis was the most prevalent co-infection pathogen with T. vaginalis, followed by Ureaplasma urealyticum and Chlamydia trachomatis. Our results indicate that PCR and multiplex PCR are the most sensitive tools for T. vaginalis diagnosis, rather than microscopy which has been routinely used to detect T. vaginalis infections in South Korea. Therefore, clinicians should take note of the high prevalence of T. vaginalis infections among adolescent and young women in order to prevent persistent infection and transmission of this disease.
Propionibacterium shermanii에 의한 비타민 B12의 생성에 영향을 미치는 배지첨가물들에 대한 연구
김지영(Ji Young Kim),김공한(Kong Hwan Kim),김경자(Kyoung Ja Kim),구양모(Yang Mo Goo) 대한약학회 1994 약학회지 Vol.38 No.5
Following the study on the fermentation conditions influencing the production of vitaminB12 by Propionibacterium shermanii(Korean J Biotechnol. Bioeng. 7, 126-131, 1992), the effects of some factors supplemented in the medium on the production of vitamin B12 were studied. Maximum production of vitamin B12 was observed when Co+2 was supplemented at the concentration of 2-4ppm in the fermentation medium. Increase of the supplemented C0+2 to 12ppm did not inhibit the growth of the organism, but it accelerated the lysis of the organism. In the literature, peptone was reported to activate the biosynthesis of vitamin B12. Examination of the effect of peptone on the growth and the production of vitamin B12 showed that at early stage more vitamin B12 was observed in the supplemented medium, but no difference was observed in the later stage of fermentation. Examination of the time for addition and the amount of 5,6-dimethylbenzimidazole, a precursor known to influence the production of vitamin B12, showed that a maximum yield of vitamin B12 was observed when 15mg/L was added to the fermentation medium after 2 days'' incubation. The effect was comparable with the increase of the production of vitamin B12 when the fermentation condition was changed to aerobic condition after 2 days'' culture under anaerobic condition.
도서지역 해양기준국 반사파 변동과 AWS 관측 기상인자와의 상관성 분석
박순(Soon Park),박승열(Seoul-Youl Park),박우경(Woo-Koung Park),구자현(Ja-Hun Goo),공현동(Hyun-Dong Kong) 한국항해항만학회 2015 한국항해항만학회 학술대회논문집 Vol.2015 No.추계
DGPS의 안정적인 운영 및 제공을 위해서는 중파대역 송출 전파의 안정성을 확보하여야 한다. 특히 대지 전도율의 병화에 따른 반사파의 변동은 안정적인 측위정보 제공 및 DGPS 기준국 운영에 영향을 미칠 수 있다. 본 논문은 반사파이 변동에 영향을 미치는 환경 변화 요인을 분석하고자 기준국 반사파의 변동과 기상인자의 상관성을 분석하였다. 도서 지역 DGPS 기준국의 반사파 변동과 기상인자와의 상관성을 분석하고자 시계열분석, 산포도 분석, 상관계수 산정 등의 방법을 이용하였다. 분석 결과 반사파 변동과 풍속, 습도는 양의 상관관계를 나타내었으며 기압과는 음의 상관관계가 나타났다. 이는 풍속과 습도가 높을수록 반사파가 크게 발생하며, 기압이 낮을수록 반사파가 낮게 나타나는 것을 의미한다. 송신 전파 특성상 기상의 변화가 반사파 변동에 직접적인 영향을 주니는 않으나 반사파가 생성되는 환경 요인에 영향을 끼치는 것으로 사료된다.
Jun-Hyeok Seo,Hye-Won Yang,So-Young Joo,Su-Min Song,Yu-Ran Lee,Jae-Sook Ryu,Eun Sang Yoo,Won Kee Lee,Hyun-Hee Kong,Sang-Eun Lee,Won-Ja Lee,Youn-Kyoung Goo,Dong-Il Chung,Yeonchul Hong 대한기생충학열대의학회 2014 The Korean Journal of Parasitology Vol.52 No.5
Trichomonas vaginalis, a causative agent of trichomoniasis, may trigger symptomatic or asymptomatic nongonococcal urethritis and chronic prostatitis in men. Despite the availability of highly sensitive diagnostic tests, such as nucleic acid amplification tests, including PCR, few prospective studies present data on male T. vaginalis infection in South Korea. In the present study, the prevalence of T. vaginalis and associated clinical conditions were evaluated in 201 male patients from a primary care urology clinic in South Korea. The prevalence of T. vaginalis infection in our cohort was 4% (8/201) by PCR. T. vaginalis infection was common in men older than 40 years (median age, 52 years). Among the 8 Trichomonas-positive patients, 87.5% (7/8) had prostatic diseases, such as prostatitis and benign prostatic hyperplasia, and 25.0% (2/8) and 12.5% (1/8) were coinfected with Chlamydia trachomatis and Mycoplasma genitalium, respectively. Our results suggest that T. vaginalis infection is not rare in men attending primary care urology clinics in South Korea, especially in those older than 40 years, in whom it may explain the presence of prostatic disease. The possibility of T. vaginalis infection should be routinely considered in older male patients with prostatic diseases in South Korea.