• The Journal of Society for e-Business Studies
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• v.24 no.1
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• pp.105-120
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• 2019

The World Health Organization (WHO) and other government agencies aroundthe world have warned against antibiotic-resistant bacteria due to abuse of antibiotics and are strengthening their care and monitoring to prevent infection. However, it is highly necessary to develop an expeditious and accurate prediction and estimating method for preemptive measures. Because it takes several days to cultivate the infecting bacteria to identify the infection, quarantine and contact are not effective to prevent spread of infection. In this study, the disease diagnosis and antibiotic prescriptions included in Electronic Health Records were embedded through neural embedding model and matrix factorization, and deep learning based classification predictive model was proposed. The f1-score of the deep learning model increased from 0.525 to 0.617when embedding information on disease and antibiotics, which are the main causes of antibiotic resistance, added to the patient's basic information and hospital use information. And deep learning model outperformed the traditional machine hospital use information. And deep learning model outperformed the traditional machine learning models.As a result of analyzing the characteristics of antibiotic resistant patients, resistant patients were more likely to use antibiotics in J01 than nonresistant patients who were diagnosed with the same diseases and were prescribed 6.3 times more than DDD.

• KOREAN POULTRY JOURNAL
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• v.31 no.5 s.355
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• pp.119-122
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• 1999

• Journal of Korean Society of Environmental Engineers
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• v.33 no.7
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• pp.492-500
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• 2011

Antibiotic resistant microbes were isolated in catfish, trout, eel and loach aquaculture effluent. The distribution of antibiotic resistant microbes in aquaculture effluent and the disinfection efficiency of antibiotic resistant microbes by electron beam irradiation were investigated. It was shown that the multi-drug resistant bacteria were Aeromonas sp., Citrobacter sp., Bacillus sp., Marinobacter sp., Pantoea sp., Pseudomonas sp. and Enterobacter sp. in aquaculture effluent. 41.7% of total strains showed the resistance against one antibiotic agent, and 58.3% of total strains showed the resistance against more than two antibiotics. It was evidently shown that the toxicity and physicochemical properties of antibiotics can be estimated using Quantitative Structure Analysis Relationship (QSAR). Electron beam irradiation was very effective for the disinfection of antibiotic resistant bacteria from aquaculture effluent, in which the disinfection efficiency was approximately 99.9% with electron beam of 1 kGy.

• Journal of Digital Convergence
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• v.14 no.4
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• pp.371-378
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• 2016

An aim of current study was to investigate the prevalence and the mechanism of quinolone-resistance in E. coli isolates obtained from chicken cecum in Korea. In addition, multilocus sequence typing (MLST) was also performed for the molecular characterization of E. coli isolates. In an antimicrobial susceptibility test by the disk diffusion method, the 63.5% (54/85) of E. coli isolates showed the resistance to quinolone group of antimicrobial agents. All of the 54 E. coli isolates showing resistant to quinolone group had sense mutations in gyrA gene and point mutations at the $57^{th}$, $80^{th}$, or $84^{th}$ residues in parC gene were detected in 90.7% of the isolates. Interestingly, E. coli ST was closely related to amino acid substitutions in parE gene. Our results indicated that the long-term use of antimicrobial agents in food-producing animals was strongly associated with a prevalence of antimicrobial resistance in commensal Enterobacteriaceae, suggesting the need for continuous surveillance and monitoring of antimicrobial resistant determinants in bacterial isolates from food animals.

• Korean Journal of Food Science and Technology
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• v.38 no.2
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• pp.313-316
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• 2006

To obtain antibiotic resistant profiles of Bifidobacterium, minimum inhibitory concentrations (MIC) of 14 antibiotics for 93 Bifidobacterium isolates from Korean intestine origin were determined. All strains tested were sensitive to chloramphenicol, rifampicin, and amoxicillin, whereas resistant to aminoglycoside family, nalidixic acid, and vancomycin. Among vancomycin-resistant strains, 34% were resistant at more than $100\;{\mu}g/mL$, and showed variant resistances toward tetracycline, erythromycin, and penicillin. Their resistances against penicillin, cephalothin, and tetracycline were higher than ten years ago. MIC of ten isolates from commercial yoghurt products were very similar to those of strains from Korean intestine origin, and 20% strains showed resistance at higher than $100\;{\mu}g/mL$ vancomycin. These results indicated patterns of antibiotic resistance against Bifidobacterium from Korean intestine origin and commercial yoghurts were very similar,and prevalence of vancomycin resistance for Bifidobacterium was 20%. To develop new probiotic, antibiotic resistance of vancomycin and risks involved should be evaluated.

• 농업기술회보
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• v.51 no.3
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• pp.25-26
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• 2014

가축사료에 항생제 사용이 전면 금지되고 친환경 축산물에 대한 소비자들의 관심이 높아지면서 축산농가에서는 자연스럽게 합성항생제를 대체하는 물질이나 기술에 대한 관심이 높아지고 있다. 최근 미생물과 봉독기술을 활용한 항생제 저감 돼지고기 생산모델을 양돈농가에 접목하여 생산성 향상과 고품질 친환경축산물 생산으로 소득이 증대한 사례가 있어 양돈농가에 소개하여 농가의 경영에 도움이 되었으면 한다.

• 농업기술회보
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• v.51 no.1
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• pp.44-45
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• 2014

앙잠이 새로운 고부가가치 산업으로 주목받고 있다. 누에가루, 동충하초, 실크화장품 등 기능성 앙잠으로 새로운 소비시장을 개척하고 있다. 이와 더불어 국립농업과학원에서는 가축 사료첨가용 항생제 대체재 개발을 목적으로 누에 면역반응 유도기술을 이용해 강력한 천연항생물질을 지닌 누에를 생산했다. 이로써 닭의 스트레스를 낮추고 면역력과 생산성을 높일 수 있는 누에분말 천연항생제를 개발하였다.

• Pediatric Infection and Vaccine
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• v.13 no.2
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• pp.155-162
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• 2006

Purpose : Appropriate use of antimicrobials is an essential factor to treat infectious diseases and prevent acquisition of antimicrobial resistant pathogens. This study was undertaken to search that application of computerized management program for restriction of antimicrobials use in a hospital is helpful to decrease antimicrobial use density. Methods : Antibiotics utilization committee decided to restrict the use of 16 antimicrobials(14 expensive drugs having fear of drug resistance by pathogens and additional two drugs with inappropriate using tendency). Retrospective evaluation of antimicrobial user numbers between May and July of 2004 and 2005(study group) was conducted to compare with previous use density during same period of 2002 and 2003(control group). Results : Inpatients number of control group($823.5{\pm}37.1$ persons) was more than study group($809.2{\pm}39.3$ persons, P<0.001), but, outpatients number and hospitalized duration were equal in two groups. Antimicrobial user number/100 inpatients per day of glycopeptides and antifungal agents was equal in two groups, and study group was significantly higher density than control group in the use of carbapenems, piperacillin-tazobactam and quinolones(P<0.001). But study group was significantly lower density than control group in the use of drugs with inappropriately using tendency and expensive cephalosporins having broad antimicrobial spectrum(P<0.001). Conclusion : Application of computerized management program for restriction of antimicrobials use in a hospital is effective to decrease the use density of antimicrobials with inappropriately using tendency, but it is an insufficient measures for the restricted use of other antimicrobials on the whole.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 2004.10a
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• pp.142-146
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• 2004

본 연구는 국내산 돈육의 Staphylococcus aureus에 대한 오염도와 항생제 내성 여부를 살펴보기 위해 실시되었다. 가공전의 원료육과 가공후의 포장육의 Staphylococcus aureus 에 대한 오염도를 비교해 본 결과 원료육에서 11.5%, 포장육에서 6.1%의 검출률을 보여 도축단계에서의 오염으로 판단된다. 돈육에서 검출된 Staphylococcus aureus의 항생제별 내성은 Penicillin 및 Ampicillin에 각각 93.3%로 매우 높은 내성률을 나타내었으며, Tetracycline에서 60.0%, Tobramycin 20.0%, Erythromycin, Streptomycin에 각각 13.3%의 내성률을 보였다. 2001년 전국 6개 도시의 일반인의 비강으로부터 분리한 S. aureus의 tetracycline에 대한 내성률은 8.2%로 돈육에서 검출된 S. aureus의 내성률과 비교하였을 때 7배 이상 높은 것을 알 수 있었다. 생산성을 향상시킬 목적으로 동물에게 항생제를 처방하고, 사료에 항생제를 첨가하여 균 자체의 내성율을 높이고 이런 균들이 인간에게 전파되어 내성균의 생성 루트가 될 수 있기 때문에 향후 돈육의 사료에 첨가하는 최초 항생제의 사용량부터 지속적인관리가 필요하리라 판단된다.

• Korean Journal of Microbiology
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• v.42 no.4
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• pp.299-305
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• 2006

D-Alaninepeptidase purified from Bacillus amyloliquefaciene CMB01 caused a reduction of survival of Proteus vulgaris, Klebsiella oxytoca, and Staphylococcus aureus placed under the osmotic pressure. D-Alaninepeptidase caused an increase of susceptibility of bacteria to antibiotics. An increased number of malformed cells in bacterial groups exposed to D-alaninepeptidase was observed by scanning electron microscopy. These data suggested that bacterial cells exposed to D-alaninepeptidase resulted in an increase of vulnerability of bacterial cells toward environmental stress, such as osmotic pressure and antibiotic substances.