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서해안 수산생물에서 분리한 대장균(Escherichia coli)의 항생제 내성 및 다제 내성 양상 비교
정연겸 ( Yeon Gyeom Jeong ),박보미 ( Bo Mi Park ),김민주 ( Min Ju Kim ),박진일 ( Jin Il Park ),정연중 ( Yeoun Joong Jung ),오은경 ( Eun Gyoung Oh ) 한국수산과학회 2021 한국수산과학회지 Vol.54 No.4
Antimicrobial resistance patterns of Escherichia coli were investigated. Strains were isolated from 310 shellfish, 36 crustaceans, and 12 fish collected off the West Coast of Korea from April 2019 to October 2020. Two hundred and ninety-five E. coli strains were isolated from shellfish, 100 from crustaceans, and 54 from fish. Strains isolated from shellfish showed the highest resistance to ampicillin (27.5%), whereas those from crustaceans were resistant to sulfisoxazole (30.0%) and those from fish were resistant to ampicillin (59.3%) and sulfisoxazole (59.3%). Ceftazidime resistance was observed in strains isolated from short neck and hard clams, whereas gentamicin resistance was observed in strains from fish. Multi-drug resistance was observed in 56 strains (48.7%) isolated from shellfish, 11 (28.2%) from crustaceans and 27 (73.0%) from fish. Depending on the source of isolation, the strains showed specific antimicrobial resistance tendency. Strains isolated from shellfish showed 12 different multi-drug resistance patterns, whereas those from crustaceans showed high resistance (59%) to a single antimicrobial agent and those from fish showed a broad trend of multi-drug resistance to more than eight antimicrobials.
창선 해역의 지중해담치(Mytilus galloprovincialis) 양식장 및 육상오염원에서 분리한 대장균(Escherichia coli)의 항생제 내성
권순재 ( Soon Jae Kwon ),이가정 ( Ka Jeong Lee ),정연중 ( Yeoun Joong Jung ),박상기 ( Sang Gi Park ),고경리 ( Kyeong Ri Go ),양지혜 ( Ji Hye Yang ),목종수 ( Jong Soo Mok ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.5
In this study, we isolated and characterized Escherichia coli from mussels and inland pollution sources in or in proximity to the Changseon area on the southern coast of Korea in 2014. A total of 147 strains of E. coli were isolated from 54 mussels and 32 pollution-source samples. The susceptibility of the isolates to 24 antimicrobial agents was analyzed. The resistance of E. coli isolates to rifampin was highest at 100%, followed by cephalothin (98.6%), tetracycline (91.8%), amikacin (81.0%), ampicillin (79.6%), cefazolin (79.6%), streptomycin (73.5%), piperacillin (70.7%), gentamicin (37.4%), cefoxitin (35.4%), cefamandole (34.7%), tobramycin (29.9%), amoxicillin/clavulanic acid (24.5%), nalidixic acid (21.8%), trimethoprim (19.0%), chloramphenicol (17.7%), cefotaxime (12.9%), trime-thoprim (10.9%), ceftazidime (10.2%), aztreonam (7.5%), imipenem (2.7%), cefepime (2.0%), and cefotetan (0.0%). In addition, the antimicrobial resistance of E. coli isolates from inland pollution sources was slightly greater than or similar to that of isolates from mussels.
산 처리에 의한 김(Pyropia sp.)의 유해 중금속(Cd, Cr, Pb) 제거 효과
목종수 ( Jong Soo Mok ),손광태 ( Kwang Tae Son ),이태식 ( Tae Seek Lee ),이가정 ( Ka Jeong Lee ),정연중 ( Yeoun Joong Jung ),김지회 ( Ji Hoe Kim ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.5
We examined the removal of hazardous heavy metals (Cd, Cr, and Pb) from laver Pyropia sp. using citric, hydrochloric, and nitric acids. Under the same conditions, the quality of the laver samples was also evaluated using the variation in absorbance and major mineral levels. The heavy metals that accumulated in raw laver samples after 3 days in seawater included Pb (117.79 μg/g), Cr (33.53 μg/g), and Cd (10.54 μg/g) in descending order. The rate of heavy metal removal from laver was higher at lower pH for all acids used. However, its color changed unsatisfactorily at pH 2.0. After 10 min in seawater at pH 2.5, the heavy metals in laver were eliminated in the order Cd (68.7-81.6%), Pb (57.7-67.0%), and Cr (31.9-49.4%) using the three acids. The differences in heavy metal removal among acid types were not significant. The laver quality was not affected after 20 min at the pH range of 2.5-4.0. The maximum removal of heavy metals was from laver soaked for 10 min in seawater at pH 2.5 using the organic acid, citric acid.
2014-2016년 경남 용남·광도해역 해수 및 굴(Crassostrea gigas)의 세균학적 위생평가
윤현진 ( Hyun Jin Yoon ),권지영 ( Ji Young Kwon ),이가정 ( Ka Jeong Lee ),권순재 ( Soon Jae Kwon ),목종수 ( Jong Soo Mok ),김풍호 ( Poong Ho Kim ),정연중 ( Yeoun Joong Jung ) 한국수산과학회(구 한국수산학회) 2018 한국수산과학회지 Vol.51 No.5
This study evaluated the sanitary state of seawater and shellfish in Yongnam-Gwangdo area from January 2014 to December 2016. The sampling stations for sanitary survey in Yongnam-Gwangdo area were composed of 41 seawater stations and 5 oyster Crassostrea gigas stations. The samples were collected monthly at each station. Shellfish-borne disease is associated with bacteria and viruses in the presence of fecal coliforms. Bacteriological pollution levels of shellfish increase with seawater quality. Therefore, fecal coliforms are very important criteria for evaluating the safety of fisheries in coastal areas. The geometric mean and the estimated 90th percentile ranges of total and fecal coliforms for seawater were 1.8-11.7, 2.8-233.6, <1.8-6.7 and 1.8-100.2 MPN/100 mL, respectively. The range of E. coli levels for oysters was <20-1,300 MPN/100 g. Based on various standards, the sanitary condition in Yongnam- Gwangdo area was evaluated as follows: clean area (Korean criteria), conditionally approved area (US criteria) and class B (EU criteria).