• 대한소화기학회지
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• 제72권5호
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• pp.245-251
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• 2018

Gastric cancer is the most common cancer in Korea and the fifth most common cancer globally. Helicobacter pylori (H. pylori) infection is considered the main etiologic agent for gastric cancer development. Most regional guidelines for H. pylori treatment recommend treating the organism to prevent gastric cancer in the high-risk group. However, evidence that such a strategy can also be applied to the general population, especially in terms of the preventive effect and safety, has not been adequately presented yet. Although a meta-analysis in the general population suggested effectiveness in decreasing gastric cancer incidence, individual studies should be critically reviewed to evaluate the soundness of the evidence. Recently published, long-term, Korean studies on metachronous gastric cancer prevention ended the controversies from previous short-term studies and confirmed the effectiveness. Currently, further prospective, large, randomized studies are ongoing in the general population and will provide more definitive, high-level evidence on this gastric cancer prevention strategy in the next decade.

• Journal of Yeungnam Medical Science
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• 제39권1호
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• pp.3-11
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• 2022

Lymphoma is the most common primary tumor of the orbit, accounting for 55% of all orbital malignancies. When divided into histopathological subtypes, extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma) comprises the largest proportion. Clinical manifestations are unspecific, but in patients with slow-growing painless orbital mass, or red conjunctival lesion suggestive of 'salmon patch', ocular adnexa lymphoma (OAL) should be suspected. Although the pathogenetic mechanism of ocular adnexal MALT lymphoma (OAML) is not yet fully understood, the relationship between OAML and Chlamydia psittaci has been hypothesized recently, similar to that between gastric MALT lymphoma and Helicobacter pylori. This suggests a new treatment option for OAML; bacterial eradication therapy with systemic antibiotics. Several other treatment methods for OAML have been introduced, but no treatment guidelines have been established yet. In this article, we summarize the current knowledge on the clinical features, pathogenesis, diagnostic methods, therapeutic strategies, and prognosis of OAML.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제8권1호
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• pp.1-11
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• 2005

목 적: 반복성 복통(Recurrent abdominal pain)은 소아의 약 10%에서 볼 수 있는 비교적 흔한 증상으로, H. pylori 감염과 반복성 복통과의 연관성에 대한 연구가 일부에서 이루어져 왔으나 아직까지 명확한 관계는 밝혀져 있지 않다. 또 반복성 복통으로 내원하여 H. pylori 감염이 확인된 소아에서 제균 요법이 반드시 필요한지에 대해서도 아직 결론이 내려지지 않은 상태이다. 저자들은 소아에서 반복성 복통증과 H. pylori 감염의 연관성을 확인하고 제균 요법이 반복성 복통의 경과에 미치는 영향을 알아보고자 하였다. 방 법: 1998년 1월부터 2005년 1월까지 반복성 복통으로 서울대학교 어린이병원에 내원하여 상부 위장관 내시경 검사를 받았던 환아 중에서 추적관찰이 가능하였던 166명을 대상으로 하였다. 이 중 H. pylori 감염 환아 70명 모두에서 제균 요법을 시행하였고, 제균 성공한 군(Group Ia) 52명과 실패한 군(Group Ib) 18명에서의 복통의 경과를 관찰하였다. 대조군인 H. pylori 비감염 환아 96명에서는 약제를 전혀 투여하지 않은 군(Group IIa) 67명, 위산억제제를 투여한 군(Group IIb) 13명, 그리고 위산억제제와 항생제를 함께 투여한 군(Group IIc) 16명으로 나누어 복통의 경과를 관찰하였다. 의무기록지 검토와 전화 인터뷰를 시행하여 6개월, 12개월 시점에서 복통의 경과를 판정하였으며, 복통이 완전히 또는 거의 완전히 소실된 경우를 grade 0, 복통이 50% 이상 현저히 호전되었으나 간혹 복통을 호소하는 경우를 grade I, 그리고 복통의 정도와 빈도에 변화가 전혀 없는 경우를 grade II로 정하였다. 결 과: 1) 전체 166명 환아의 연령은 $10.0{\pm}3.3$세, 남녀비는 1:1.72, 내원 전까지의 복통의 지속기간은 $18.2{\pm}19.3$개월, 추적 관찰기간은 $3.0{\pm}2.6$년이었다. 대상 환아의 특성, 증상이 시작될 당시의 연령, 증상의 지속기간, 추적 관찰기간 등에 있어서 H. pylori 감염군과 비감염군 사이에 유의한 차이는 없었다. 2) 상부 위장관 내시경 소견 결과에서 H. pylori 감염군에서 결절성 위염(p<0.001)이나 결절성 십이지장염(p=0.001)의 빈도가 유의하게 높았고, 비감염군의 경우 정상 내시경 소견을 보인 빈도가 유의하게 높았다(p<0.001). 병리 조직검사에서 H. pylori 감염군에서 비감염군에 비해 중등도 만성 위염(71.4% vs 12.8%, p<0.001)과 중증 만성 위염(15.7% vs 1.1%, p<0.001)의 빈도가 유의하게 더 높았다. 3) H. pylori 감염 환아 70명에서 1개월 동안 복통의 경과를 관찰하였을 때, 제균 성공한 군(Group Ia)은 grade 0 69.2%, grade I 19.2%, grade II 11.5%였고 제균 실패한 군(Group Ib)은 grade 0 50.0%, grade I 44.4%, grade II 5.6%로 두 군에서 통계적으로 유의한 차이가 없었다(p=0.103). 6개월 동안 복통의 경과를 관찰하였을 때, Group Ia는 grade 0 72.1%, grade I 21.0%, grade II 7.0%였고 Group Ib는 grade 0 50.0%, grade I 30.0%, grade II 20.0%로 마찬가지로 두 군에서 통계적으로 유의한 차이는 없었다(p=0.311). 1년 경과관찰 시에도 Group Ia는 grade 0 75.0%, grade I 12.5%, grade II 12.5%였고 Group Ib는 grade 0 55.6%, grade I 33.3%, grade II 11.1%로 역시 두 군에서 통계적으로 유의한 차이는 없었다(p=0.338). 4) H. pylori 비감염 환아 96명에서 1개월간 복통의 경과를 관찰하였을 때, 약제를 전혀 투여하지 않은 군(Group IIa)은 grade 0 34.3%, grade I 38.8%, grade II 26.9%, 위산 억제제를 투여한 군(Group IIb)은 grade 0 46.2%, grade I 23.1%, grade II 30.8%, 그리고 위산 억제제와 항생제를 함께 투여한 군(Group IIc)은 grade 0 43.8%, grade I 18.8%, grade II 37.5%로 세 군 간에 통계적으로 유의한 차이가 없었다(p=0.533). 6개월간 복통의 경과를 관찰하였을 때, Group IIa는 grade 0 45.6%, grade I 33.3%, grade II 21.1%, Group IIb는 grade 0 50%, grade I 30%, grade II 20%, Group IIc는 grade 0 72.7%, grade I 0%, grade II 27.3%로 마찬가지로 세 군 간에 통계적으로 유의한 차이가 없었다(p=0.269). 1년 경과관찰 시에도 Group IIa는 grade 0 58.7%, grade I 17.4%, grade II 23.9%, Group IIb는 grade 0 66.7%, grade I 11.1%, grade II 22.2%, Group IIc는 grade 0 70.0%, grade I 20.0%, grade II 10.0%로 마찬가지로 복통의 경과는 세 군에서 유의한 차이는 없었다(p=0.879). 결 론: 반복성 복통 환아에서 H. pylori 감염 시 제균 요법을 시행하였을 때 대부분에서 복통이 호전되었으나 복통의 경과는 제균의 성공 또는 실패여부와 상관없었다. 이는 반복성 복통과 H. pylori 감염의 연관성이 적음을 시사하는 소견으로 판단된다. 또한 H. pylori 감염이 없는 환아도 약제의 투여 여부와 상관없이 내시경 검사 후 대부분에서 복통이 호전되는 경과를 보였다. 따라서 반복성 복통 환아에서 제균 요법을 포함한 약물 치료를 하는 것보다 환자가 기질적인 병변이 없다는 인식을 갖게 하는 것이 복통의 소실에 더 도움이 될 것으로 생각된다.

• Journal of Animal Science and Technology
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• 제56권4호
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• pp.13.1-13.5
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• 2014

The production performance of multiparous lactating Sahiwal cows (n = 24) was evaluated according to both milking frequency and method. Selected animals were randomly divided into four groups containing six animals each under a completely randomized design. Cows in groups A & B were milked by the hand milking method three times per day, respectively. Similarly, cows in groups C & D were milked by the machine milking method two and three times per day, respectively. All animals were maintained under uniform feeding and management conditions. Dry matter intake was high in animal groups milked three times per day, and it remained unchanged between the hand and machine milking methods. Milk yield was higher (P < 0.05) in cows milked three times compared to those milked twice per day, and it did not differ between hand and machine milking methods. Milk fat percentage was higher (P < 0.05) in cows milked twice per day compared to those milked three times using both machine and hand milking methods. The percentage of total solids showed a similar pattern as the fat percentage. However, percentages of protein, lactose, and non-fat solids in milk were not significantly different (P > 0.05) among the treatment groups. Collectively, the results show that milking three times per day instead of twice at 8-hour intervals can enhance milk yield in Sahiwal cows using both hand and machine milking methods.

• 한국동물위생학회지
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• 제36권1호
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• pp.7-13
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• 2013

Bovine viral diarrhea virus (BVDV) is one of the most important disease viruses in cattle that can cause severe economical losses due to decreased fertility, abortion, diarrhea, and respiratory symptoms. Therefore, this study was aimed to investigate prevalence of BVDV infection (Transiently infection, Persistently infection) in dairy cattle in Gyeongnam southern area, Korea and use this data as the basis for establishing an eradication program and policy. A total of 44 bulk-tank milk samples (farms) collected in milk collecting center were tested for BVDV antibody using an ELISA. As the result, out of a total of 44 bulk-tank milk samples (farms), 38 (86.4%) samples were BVDV antibody positive. Blood samples (17 farms, n=543) were collected from BVDV antibody positive farms in bulk-tank milk, tested for BVDV antigen with ELISA and PCR. BVDV infected farms were 47% (8/17) and BVDV infected head were 2.2% (12/543). Persistently infected cattle (PI) were detected at 6 (35.3%) farms out of 17 farms and a total of 6 (1.1%) out of 543 head of cattle were identified as PI. The seropositive of BVDV antibody at farms and head were 100% (17/17) and 49.45% (91/184), respectively. The seroprevalence of BVDV antibody in PI infected farms (67.35%) much higher than that of BVDV antibody in transiently infected cattle (TI) infected farms (45%) and uninfected farms (34.48%). For eradication of BVDV infection in cattle populations, First of all, we should remove PI and need vaccination.

• 한국임상약학회지
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• 제15권2호
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• pp.75-81
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• 2005

Community acquired pneumonia (CAP) remains a prevalent and potentially life threatening illness. American Thoracic Society and Infectious Disease Society America recommend combination therapies with ${\beta}-lactam$ plus a macrolide or a fluoroquinolone monotherapy for the empirical treatment of CAP. The aim of this study was to compare moxifloxacin monotherapy with cephalosporin plus azithromycin combination therapies. From January 2004 to March 2005, 18 patients in the moxifloxacin group(MG) and 21 patients in the cefuroxime or ceftriaxone plus azithromycin group(CAG) with CAP were retrospectively reviewed with regard to clinical, laboratory and microbiological data. Each patient was stratified into mild (risk class I-II), moderate (risk class III) and severe (risk class VI, V) group according to and PSI (Pneumonia Severity Index) score. Each group was compared for microbiological eradication, clinical assessment, the length of hospital stay. As results, Total 39 patients with CAP were reviewed. The appropriateness of admission was 83.3% in MC vs. 76.2% in CAC. The mean length of the hospital day was for 8.31 days vs. 7.39 days, days switching parenteral to oral antibiotics in 5.19 days vs. 5.28 days, clinical improvement in 2.43 days vs. 2.61 days in MG vs. CAC. Radiological improvement required 3.75 days vs 3.63 days in MG vs. CAG and bacteriological eradication rate at discharge was the same in the both groups. Mortality rate was 11.1% (2 of 18) vs 14.3% (3 of 21) in MG vs. CAG (p=0.77). Drug cost of the mean 5 hospital days requiring parenteral antibiotics was the most inexpensive in moxifloxacin group for the 147,045 won, and ceftriaxone 1g-azithromycin group for the 170,285 won, cefuroxime bid-azithromycin group for the 207,800 won, ceftriaxone 2g-azithromycin group far the 220,570 won, cefuroxime tid-azithromycin group for the 251,700 won. There was no significant statistical difference in clinical, bacterial, radiological cure and hospital days, and switch to oral days. In conclusion, that i.v. moxifloxacin monotherapy was as effective as azithromycin plus cefuroxime or ceftriaxone combination therapies fur the treatment of CAP. In drug cost analysis, moxifloxacin is less expensive than CAG.

• 대한수의학회지
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• 제46권2호
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• pp.107-117
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• 2006

This paper described the epidemiological characteristics of 2002 outbreak of classical swine fever (CSF) in Korea. A total of thirteen CSF-infected farms could be classified into two clusters according to the location and time of outbreak. Two farms located in the same county of Gangwon province and 11 farms located in several different districts of Incheon metropolitan/Gyeonggi province were identified as CSF-infected from April 16 to 30 and from October 7 to December 21 in 2002, respectively. As the result of epidemiological analysis, the two clusters of outbreaks were turned out to be independent epidemics which had different sources of virus introduction. Three farms were found to have been infected primarily; one located in Cheolwon county of Gangwon province and two located in Kangwha county of Incheon metropolitan area. The most likely factors of virus introduction into these primary infected farms were considered to be direct or indirect contact by foreign workers and/or owners of the infected farms who had come back from traveling in China before outbreaks. This was supported by the genetic typing of CSF viruses isolated from the pigs of infected farms. All the virus isolates of 2002 outbreak were found to be genetic type 2, whereas the viruses isolated before 2000 were type 3 and the reference strains, such as attenuated live vaccine virus (LOM strain) and high virulent challenge virus (ALD strain), were type 1. Accordingly, we concluded that the 2002 CSF outbreak must have been caused by a newly introduced virus from overseas and the type 3 virus must have been eradicated after the last outbreak of 1999 by the national CSF eradication campaign which were implemented since 1996. Based on the combined analysis of epidemiological data and genetic typing, the transmission routes of classical swine fever virus were found to be the movement of vehicles (60%) and persons (10%), neighbourhood spread (20%) and unknown (10%). It is expected that the analyzed data and findings of classical swine fever outbreak epidemic could be very useful to establish the disease control and eradication program for the country in the future.

• 한국자원식물학회지
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• 제22권1호
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• pp.96-101
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• 2009

독도는 460만 년 전부터 250만 년 전에 형성된 이래 울릉도나 본토와 한번도 맞닿은 적이 없었기 때문에 식물 진화를 논할 수 있는 식물지리학적으로 매우 중요한 의미 있는 섬이다. 동도의 광의의 귀화식물은 목본인 섬괴불나무와 보리밥나무 2종과 초본류 23종으로 총 27종류이다. 그리고 협의의 귀화식물은 방가지똥, 갓, 소리쟁이, 흰명아주, 그리고 개보리 등으로 5종류이다. 외부에서 이입된 귀화식물은 총 32종류에 해당하므로 동도 현존식물 약60종에 대해 60%에 해당한다. 따라서 독도는 이입종에 의한 생태적 교란이 매우 심하고 독도 고유 식물들의 생육환경이 매우 불안전한 상태이므로 자생종의 보전차원에서 귀화식물의 유입 차단이나 제거 등의 관리 방안이 도출되고 정책적인 관심이 요구된다고 판단된다.

• Clinical and Experimental Reproductive Medicine
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• 제26권3호
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• pp.339-344
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• 1999

Objective: To evaluate incidence of microbial growth from the tip of the embryo transfer catheter after embryo transfer in relation to clinical pregnancy rate following in-vitro fertilization and embryo transfer. Method: This study was performed prospectively at the time of transcervical embryo transfer following conventional in-vitro fertilization and intracytoplasmic sperm injection procedures. Sixty three patients were enrolled in this study. Microbiological cultures were performed on endocervical swabs and embryo transfer catheter tips. Results: Positive microbial growths were observed from endocervical swabs in 45 (71.4%) women and from catheter tips in 30 (47.6%) women. There was no statistically significant difference seen in the mean number of oocytes fertilized or number and grade of embryos transferred between the group of patients without growth and the group of patients with positive microbial growth from catheter tips. The clinical pregnancy rate were 30.3% in the group of patients without growth and 13.3% in the group with positive microbial growth from catheter tips. This difference in clinical pregnancy rates was statistically significant. Conclusion: Our finding is that microbial contamination at embryo transfer may influence implantation rates. The major questions arising from our finding are whether eradication of endocervical micro-organisms is possible and whether their eradication will improve implantation rates.

• 대한수의학회지
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• 제51권2호
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• pp.117-122
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• 2011

Bovine tuberculosis (bTB), caused primarily by Mycobacterium bovis, continues to exert an economic loss, even in countries with active control measures, and is one of zoonotic diseases enable to be transmitted to human. The control and eradication of bTB are mainly based on a test and slaughter policy and/or abattoir surveillance. Various factors including limitation of diagnostic tests have been considered as major constraints to eradication. Single intradermal test (SIT) is the official diagnostic test. New diagnostic methods are needed to be developed, because of limitations of the test. In the present study SIT was compared with single intradermal comparative cervical test (SICCT) and interferon (IFN)-${\gamma}$ assay. There was very low correlation between SIT and SICCT. However, high correlation was shown between SIT and IFN-${\gamma}$ assay while no correlation was observed between SICCT and IFN-${\gamma}$ assay. Therefore, our results suggest the possibility of replacement of SIT with IFN-${\gamma}$ assay for the diagnosis of bovine tuberculosis.