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Oxytetracycline과 neomycin 복합제의 약욕에 따른 양식 넙치(Paralichthys olivaceus)의 근육내 잔류량 변화
김승민,전려진,정준범,Kim, Seung Min,Jun, Lyu Jin,Jeong, Joon Bum 한국어병학회 2015 한국어병학회지 Vol.28 No.1
본 연구에서는 넙치 (평균체장 및 무게: $20{\pm}2.0cm$, $70{\pm}5.0g$)에 옥시테트라사이클린(oxytetracycline, OTC)-네오마이신(neomycin, N) 복합제를 25-10 ppm 및 50-20 ppm으로 용해하여 2일 동안, 3시간씩 약욕을 실시하였고, 약물투여 중지 후 1일, 5일, 14일, 40일째에 시험군별로 각각 5마리씩 넙치의 근육을 채취하여 항생제 잔류농도를 조사하였다. OTC와 N 표준용액을 농도별로 희석하여 표준곡선을 작성한 결과 각각 $R^2=0.9999$, $R^2=0.9952$로 양호한 직선성을 나타내었고, OTC와 N 회수율은 각각 90~93%, 88~95%가 관찰되었다. 잔류농도에 대한 측정결과, OTC와 N 복합제를 25-10 ppm 투여한 시험군에서 1일째 OTC는 $0.97{\pm}0.084{\mu}g/ml$이 검출되었고, N은 $0.118{\pm}0.079{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다. OTC와 N 복합제를 50-20 ppm 투여한 시험군에서 1일째 OTC는 $1.324{\pm}0.062{\mu}g/ml$이 검출되었고 N은 $0.788{\pm}0.05{\mu}g/ml$이 검출되었으나 5일째 이후부터 검출이 되지 않았다. In the present study, we performed a dipping of olive flounder (average length and weight: $20{\pm}2.0cm$, $70{\pm}5.0g$) for a period of three hours a day, over two days, in a melted complex of oxytetracycline (OTC) and neomycin (N), by dissolving 25-10 ppm or 50-20 ppm in water. Subsequently, the remaining antibiotic density in muscle tissue collected from olive flounder was investigated, 1, 5, 14 and 40 days after discontinuation of the medication. 5 fish were used from each group. The standard graph drawn from the results of diluting two standard solutions of OTC and N based on various density levels, showed a relatively straight line with an $R^2$ of 0.9999 and 0.9952, respectively. The recovery rate of OTC was shown to be 90-93% and N, 88-95%. Upon measurement of the remaining antibiotic density in the test group that had been exposed to 25-10 ppm of the complex of OTC and N, $0.97{\pm}0.084{\mu}g/ml$ of OTC and $0.118{\pm}0.079{\mu}g/ml$ N were detected on 1 day of the test. No antibiotic density was detected after day 5 of the test. Regarding the test group that were exposed to 50-20 ppm of the complex of OTC and N, $1.324{\pm}0.062{\mu}g/ml$ of OTC and $0.788{\pm}0.05{\mu}g/ml$ N were detected on day 1 of the test, and no antibiotic density was detected after day 5 of the test.
양식 넙치에서 분리한 어병세균의 lincomycin에 대한 내성 유전자의 분포
김예지,전려진,이영준,고예진,한소리,김성현,정준범,Kim, Ye Ji,Jun, Lyu Jin,Lee, Young Juhn,Ko, Ye Jin,Han, So Ri,Kim, Sung Hyun,Jeong, Joon Bum 한국어병학회 2022 한국어병학회지 Vol.35 No.1
Lincomycin as one of the lincosamides antibiotics have been mainly used in human and livestock fields, but have not been used in aquaculture. In this study, the distribution of minimum inhibitory concentration (MIC) values against lincomycin and the detection of the macrolide-lincosamide-streptogramin (MLS) resistance gene were confirmed in bacterial pathogens isolated from cultured olive flounder (Paralichthys olivaceus). Of the 107 strains isolated from Jeju, 36 strains of Gram-positive bacteria and 71 strains of Gram-negative bacteria were identified. Most of Streptococcus spp. was found to have a MIC value of less than or equal to 0.5 ㎍/mL, and Edwardsiella piscicida was found to have a MIC value higher than 1,024 ㎍/mL. V. harveyi and V. alginolyticus mostly showed MIC values of 256 ㎍/mL, but V. scophthalmi displayed values of 8~64 ㎍/mL. In the detection of MLS resistance gene, erm(B) was detected in 9 strains of Streptococcus spp., and erm(A) was confirmed in one strain.
Pearl Gourami (Trichogaster leeri)로부터 분리한 Iridovirus의 유전적 특성과 병원성 분석
김호열,정준범,전려진,윤소혜,조혜진,정현도,Kim, Ho Yeoul,Jeong, Joon Bum,Jun, Lyu Jin,Yoon, So Hye,Cho, Hye Jin,Jeong, Hyun Do 한국해양바이오학회 2006 한국해양바이오학회지 Vol.1 No.3
본 연구에서는 비장 내의 비대해진 세포 존재와 조직 괴사라는 병리조직학적 관찰에 의하여 우리 나라의 pearl gourami (Trichogaster leeri)에서 iridovirus에 의한 자연 감염이 나타남을 확인하였다. 이러한 iridovirus 감염을 더욱 정확하게 진단하기 위해서 iridovirus 감염 진단에 주로 사용되는 MCP와 ATPase gene 부위에서 2 primer sets를 제작하여 PCR을 실시한 결과, PCR 생성물은 기대한 size와 부합하게 나타났고, MCP gene 부위의 염기서열은 reference strain인 ISKNV와 매우 높은 유사성 (99.6%)을 보였다. 공격 실험을 통하여 pearl gourami에서 분리된 iridovirus의 병원성을 확인하였고, 무분별한 관상어 관리에 의하여 관상어로부터 양식어류에로의 질병 전이가 나타남으로서 일어날 수 있는 국내 양식 산업에 대한 위험성을 제시하였다. In the survey of the samples infected by iridovirus, we found the natural outbreak of iridovirus disease in the ornamental fish, pearl gourami (Trichogaster leeri) in Korea. It was characterized by the appearance of enlarged cells and necrosis in the observation of the imprinted spleen cells under iridovirus. To determine the infection of iridovirus more accurately, PCR using 2 different primer sets for MCP and ATPase gene used for the diagnosis of iridovirus infection was done and found the produced fragments matched with the size of expectation. Partially determined nucleotide sequences of the MCP gene of the iridovirus isolated in this study showed very high homology (99.6%) with that of ISKNV as a reference strain. In challenge experiment with the iridovirus isolated from the moribund of pearl gourami, the pathogenicity of the isolated iridovirus was confirmed and suggested the potential of the risk associated the transfer of iridovirus from the ornamental fishes to the marine culturing fishes.
제주도 여윔증상 넙치(Paralichthys olivaceus)로부터 분리한 점액포자충의 특성 분석
김승민 ( Seung Min Kim ),전려진 ( Lyu Jin Jun ),박명애 ( Myoung Ae Park ),정현도 ( Hyun Do Jeong ),정준범 ( Joon Bum Jeong ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.3
To investigate the causes of emaciation in cultured olive flounder Paralichthys olivaceus in Korea. We performed histological examinations and polymerase chain reaction (PCR) with a new primer set. In most cases, the most severe emaciation was observed in the abdominal area Using PCR on extracted livers, kidneys, spleens, gills, brains, and intestines, we found that areas around the kidneys and intestines were as almost always positive. In significantly ema-ciated fish, PCR was positive in all internal organs except the gills. In addition, the homology of 812-bp nucleotide sequences of the 28S rRNA gene was more than 99% in emaciated fish. Partial homology with Myxobolus spp. and Cystodiscus axonis, whose data were obtained from GenBank was 86% and 88%, respectively. Histological examina-tions detected spores in kidneys and intestines but not in other organs. We also performed cohabitation experiments to determine whether infections could be exchanged among species or only within species. Uninfected olive flounder and red sea bream, Pagrus major, cohabitating with emaciated olive flounder showed 100% and 0% cumulative mor-tality, respectively. Thus the cause of emaciation in cultured olive flounder of Korea is likely due to a new parasite.
Oxytetracycline과 neomycin 복합제의 약욕에 따른 양식 넙치(Paralichthys olivaceus)의 근육내 잔류량 변화
김승민 ( Seung Min Kim ),전려진 ( Lyu Jin Jun ),정준범 ( Joon Bum Jeong ) 한국어병학회 2014 한국어병학회지 Vol.28 No.1
본 연구에서는 넙치 (평균체장 및 무게: 20±2.0cm, 70±5.0 g)에 옥시테트라사이클린(oxytetracycline, OTC)-네오마이신(neomycin, N) 복합제를 25-10 ppm 및 50-20 ppm으로 용해하여 2일 동안, 3시간씩 약욕을 실시하였고, 약물투여 중지 후 1일, 5일, 14일, 40일째에 시험군별로 각각 5마리씩 넙치의 근육을 채취하여 항생제 잔류농도를 조사하였다. OTC와 N 표준용액을 농도별로 희석하여 표준곡선을 작성한 결과 각각 R2= 0.9999, R2= 0.9952로 양호한 직선성을 나타내었고, OTC와 N 회수율은 각각 90∼93%, 88∼95%가 관찰되었다. 잔류농도에 대한 측정결과, OTC와 N 복합제를 25-10 ppm 투여한 시험군에서 1일째 OTC는 0.97±0.084 μg/ml이 검출 되었고, N은 0.118±0.079 μg/ml이 검출되었으나 5일째 이후부터 검출이 되지 않았다. OTC와 N 복합제를 50-20 ppm 투여한 시험군에서 1일째 OTC는 1.324±0.062 μg/ml이 검출되었고 N은 0.788±0.05 μg/ ml이 검출되었으나 5일째 이후부터 검출이 되지 않았다. In the present study, we performed a dipping of olive flounder (average length and weight: 20±2.0 cm, 70±5.0 g) for a period of three hours a day, over two days, in a melted complex of oxytetracycline (OTC) and neomycin (N), by dissolving 25-10 ppm or 50-20 ppm in water. Subsequently, the remaining antibiotic density in muscle tissue collected from olive flounder was investigated, 1, 5, 14 and 40 days after discontinuation of the medication. 5 fish were used from each group. The standard graph drawn from the results of diluting two standard solutions of OTC and N based on various density levels, showed a relatively straight line with an R2 of 0.9999 and 0.9952, respectively. The recovery rate of OTC was shown to be 90-93% and N, 88-95%. Upon measurement of the remaining antibiotic density in the test group that had been exposed to 25-10 ppm of the complex of OTC and N, 0.97±0.084 μg/ml of OTC and 0.118±0.079 μg/ml N were detected on 1 day of the test. No antibiotic density was detected after day 5 of the test. Regarding the test group that were exposed to 50-20 ppm of the complex of OTC and N, 1.324±0.062 μg/ml of OTC and 0.788±0.05 μg/ml N were detected on day 1 of the test, and no antibiotic density was detected after day 5 of the test.
2015년 제주도 양식 넙치(Paralichthys olivaceus)를 대상으로 한 VHS 및 RSIVD 모니터링
박현경 ( Hyun Kyung Park ),전려진 ( Lyu Jin Jun ),김승민 ( Seung Min Kim ),박명애 ( Myoung Ae Park ),조미영 ( Mi Young Cho ),황성돈 ( Seong Don Hwang ),박신후 ( Shin Hoo Park ),정현도 ( Hyun Do Jeong ),정준범 ( Joon Bum Jeong ) 한국수산과학회(구 한국수산학회) 2016 한국수산과학회지 Vol.49 No.2
In this study, disease surveillance was performed to monitor the prevalence of viral haemorrhagic septicaemia virus (VHSV) and red seabream iridovirus (RSIV) in olive flounder, Paralichthys olivaceus in 2015. The fish samples were collected in March (60 farms), May (55 farms) and July (52 farms) from different farms in Jeju. Reverse transcription polymerase chain reaction (RT-PCR) (VHSV) or PCR (RSIV) results showed that VHSV detected in 2 farms, but RSIV has not been detected in any farms. The sequences of the nucleocapsid protein (N) and gly-coprotein (G) gene of the 2 VHSV isolates were successfully sequenced. Phylogenetic analysis was included VHSV isolates reported here together with a representative VHSV isolates available in GenBank. Phylogenetic analysis in-dicated that most of Korea VHSV isolates were closely related to the Japan and China genotype Ⅳa which is clearly distinct from the North American genotype Ⅳb.
수입산 관상어로부터 분리된 tetracycline 내성 Aeromonas spp에 tet (M) 및 tet (G) 유전자의 특성 분석
박신후 ( Shin Hoo Park ),전려진 ( Lyu Jin Jun ),조기택 ( Ki Taek Cho ),진지웅 ( Ji Woong Jin ),정현도 ( Hyun Do Jeong ) 한국수산과학회 2012 한국수산과학회지 Vol.45 No.3
In this study, the molecular structures of tet(M) and tet(G) carried by tetracycline (Tc) resistant bacteria in intestinal microflora from the imported ornamental fish were characterized and compared with each other depend on the imported countries. Of the total isolates, approximately 8.9% of the Ent-lac+ (lactose fermentative bacteria on coliform media) Tc resistant isolates in fish from three different countries, Singapore, Taiwan and Brazil, were appeared to contain tet (M). Three representative isolates of different countries, Aeromonas spp. JSM-1 (Singapore), JTM-1 (Taiwan) and JBM-1 (Brazil), were isolated and analyzed the molecular structures of tet (M) gene. Interestingly, partial sequence tet (M) genes (1099 bp) in JBM-1 (Brazil) showed 99.5% homology with the tet (M) found in the Vibrio spp. RV16 isolate, obtained from marine fish in Korea and known to carry Tn1545 parent type of tet (M). In contrast, tet (M) gene JSM-1 and JTM-1 showed mosaic structure of Tn1545 and Tn916, and 100% homology with each other. It may suggest the presence of various characteristics in terms of tet (M) gene structure. The determined sequence of the tet(G) from Aeromonas spp. JSG-1 and JBG-1 isolated from Singapore and Indonesia ornamental fish respectively showed similar nucleotide sequence homology but revealed a few nucleotide changes in comparison with the sequence of the prototype tet (G) gene (S52437 in GenBank).