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대구지역 폐수처리장에서 분리한 cefotaxime-resistant Escherichia coli의 특성
김환득 ( Hwan Deuk Kim ),박대현 ( Dae Hyun Park ),이미리 ( Mi Ree Lee ),김은정 ( Eun Jeong Kim ),조재근 ( Jae Keun Cho ) 한국동물위생학회 2014 한국동물위생학회지 (KOJVS) Vol.37 No.4
In this study, 185 cefotaxime-resistant Escherichia coli were isolated from different stages of a wastewater treatment plant (WWTP) in Daegu in Korea. Among them, 99.5% (184 isolates) originated from raw sewage and 0.5% (1 isolates) from the final effluent. Cefotaxime-resistant E. coli were high resistant to ampicillin, piperacillin, cefazolin, cephalothin, cefachlor and cefamandole (99.5∼100%). About 93% of the cefotaxime-resistant E. coli were extended-spectrum β-lactamases (ESBL)- producing E. coli. The blaTEM+CTX gene was the most predominant of the ESBL genes (72.5%), followed by blaCTX-M (16.2%), blaTEM (8.7%), blaTEM+CTX+SHV (1.1%), blaTEM+SHV, blaTEM+OXA, and blaTEM+CTX+SHV (respectvely 0.5%). Class 1 and 2 integron were found in 49.7% and class 3 integron was not found. All of integron positive isolates were multiresistant (i.e. resistant to four or more antibiotics). Our findings showed WWTP is contaminated with antibiotic resistant bacteria with resistance genes.
대구지역 동물병원에서 입원중인 개와 고양이로부터 분리된 항생제 내성 대장균
조재근,김정미,김환득,김경희,Cho, Jae-Keun,Kim, Jeong-Mi,Kim, Hwan-Deuk,Kim, Kyung-Hee 한국동물위생학회 2017 한국동물위생학회지 (KOJVS) Vol.40 No.3
This study was carried out to investigate the antimicrobial resistance profiles and resistance genes in 62 Escherichia coli isolated from dogs and cats hospitalized at animal hospitals in Daegu. E. coli isolates showed high resistance to nalidixic acid (46.8%) and ampicillin (45.2%). Resistance to the other antimicrobial agents was less than 30%, and no resistant isolates were detected for imipenem and amikacin. Of the 28 ampicillin-resistant isolates, TEM and CTX-M genes were detected in 16 (57.1%) and 11 (39.3%), respectively. The aadA gene was found in 4 (26.7%) of 15 gentamicin-resistant isolates, and strA-strB gene was found in 10 (66.7%) isolates. The sul I and sul II genes were detected in 11 (61.1%) and 14 (77.8%) of 18 trimethoprim/sulfamethoxazole-resistant isolates, and tetB gene in 9 (81.8%) of 11 minocycline-resistant isolates, and cmlA gene in 2 (22.2%) of 8 chloramphenicol-resistant isolates. The qnrB and qnrS genes were found in 3 (10.3%) and 1 (3.4%) of 28 nalidixic acid-resistant isolates, respectively. Whereas, none of the SHV, CMY-2, tetA, dfr Ia and dfr VII, and qnrA genes were found. Our results show a wide variety of resistance genes in E. coli isolates from dogs and cats. This study also represents the first report of qnrB and qnrS gene producing E. coli isolates from dogs in republic of Korea.
낙동강과 금호강에서 분리된 광범위 베타 락탐 분해효소 생성 Escherichia coli 내 항균제 내성 및 integrons의 분포
조재근 ( Jae Keun Cho ),김환득 ( Hwan Deuk Kim ),권순효 ( Soon Hyo Kwon ),김진현 ( Jin Hyun Kim ),장성일 ( Sung Il Jang ),박최규 ( Choi Kyu Park ),김기석 ( Ki Seuk Kim ) 한국동물위생학회 2014 한국동물위생학회지 (KOJVS) Vol.37 No.1
This study was conducted to investigate the antimicrobial resistance, presence of β-lactamase genes and integrons in 83 ESBL-producing Escherichia coli isolated from Nakdong river and Geumho river in Daegu. Among the β-lactam antimicrobials, all isolates were resistant to ampicillin, cephalothin, cefamandole and cefotaxime, followed by piperacillin (98.8%), ampicillin/sulbactam (86.7%), aztreonam (60.2%) and cefepime (59.0%), whereas resistance to piperacillin/tazobacram, ticarcillin/clavulanic acid and cefoxitin was less than 30%. Many of the ESBL-producing Escherichia coli were also resistant to non-β-lactams antimicrobials such as nalidixic acid (83.1%), sulfonamides (72.3%), ciprofloxacin (62.7%) and gentamicin (38.6%). All isolates showed resistance to seven or more antimicrobial agents.The most frequently detected gene was blaTEM+CTX-M (49.4%), followed by blaCTX-M (27.7%), blaTEM (6.0%) and blaOXA (1.2%). But blaSHV was not found. Class 1 integrons were found in 61.4% (51 isolates) of isolates, however, class 2 and 3 integrons were not detected. The results showed water from Nakdong river and Geumho river is contaminated with ESBL-producing E. coli isolates. These results suggest the need for further investigation of antibiotic resistant bacteria to prevent public health impacts in the water environment.
대구지역 개와 고양이에서 분리된 Staphylococcus pseudintermedius의 fluoroquinolone 내성
조재근 ( Jae-keun Cho ),김정미 ( Jeong-mi Kim ),김환득 ( Hwan-deuk Kim ),김경희 ( Kyung-hee Kim ),양창렬 ( Chang-ryoul Yang ) 한국동물위생학회 2017 한국동물위생학회지 (KOJVS) Vol.40 No.1
The purpose of this study was to investigated the fluoroquinolone (FQ) resistance and presence of gyrA and grlA gene in 87 Staphylococcus pseudintermedius isolates obtained from clinical samples of dogs and cats. Also, the profiles of FQ resistance compared with methicillin resistant S. pseudintermedius (MRSP) isolates. FQ resistance was observed for enrofloxacin (41.4%), ciprofloxacin (39.1%), norfloxacin (36.8%), ofloxacin and levofloxacin (32.2%, respectively), and moxifloxacin (31.0%). Thirty-eight (43.7%) of 87 S. pseudintermedius isolates were resistant to more than one FQ. Twenty-six (64.5%) of 38 FQ resistant isolates were resistant to all the six FQ tested. Of 38 FQ resistant isolates, gyrA gene was detected in all isolates but grlA gene was not found. Moreover, 19 MRSP isolates were resistant to enrofloxacin (63.2%), ciprofloxacin (57.9%), norfloxacin (52.6%), and ofloxacin, levofloxacin and moxifloxacin (47.4%, respectively). FQ resistance were highly prevalence in S. pseudintermedius isolates from dogs and cats. Our results emphasize the prudent use of antimicrobial agents to companion animals is necessary for prevent antimicrobial resistance.
개와 고양이에서 분리한 methicillin 내성 및 감수성 Staphylococcus pseudintermedius
조재근 ( Jae-keun Cho ),이미리 ( Mi-ree Lee ),김정미 ( Jeong-mi Kim ),김환득 ( Hwan-deuk Kim ) 한국동물위생학회 2016 한국동물위생학회지 (KOJVS) Vol.39 No.3
Staphylococcus pseudintermedius is an important opportunistic pathogen of dog and cats. Since 2006 there has been a significant emergence of methicillin-resistant S. pseudintermedius (MRSP) mainly due to clonal spread. The aim of this study was to investigated the prevalence of antibiotic resistance and presence of mecA and femA gene in 91 S. pseudintermedius isolates isolated from dogs and cats asso-ciated with various clinic infections. Methicillin resistance was confirmed by oxacillin disc diffusion method. MRSP isolate was detected 19 isolates (20.9%). MRSP and methicillin-resistant S. pseudinter-medius (MSSP) isolates were highly resistant to penicillin, kanamycin, tetracycline, erythromycin, trime-thoprim- sulfamethoxazole, clindamycin, ciprofloxacin, enrofloxacin and choloramphenicol (100∼47.3% and 90.3∼33.3%, respectively). About 90% of MRSP isolates were multi-drug resistance (resistance to at least five or more antimicrobials), and MSSP isolates was ca 74%. Among the 91 isolates, mecA gene was detected in 25 isolates (27.5%, 19 in MRSP isolates and 6 in MSSP isolates), but none carried the femA gene. Our results indicated MRSA isolates show a strong resistance to antimicrobials com-monly used in veterinary medicine. A continuous surveillance and monitoring should be called for to prevent the contamination and spread of MRSP in dogs and cats.
대구지역 도축장 출하가축의 도체에서 분리한 Staphylococcus aureus의 항생제 내성과 MRSA 검출에 관한 연구
임현숙 ( Hyun-sook Lim ),서동균 ( Dong-keun Suh ),김환득 ( Hwan-deuk Kim ),이혜화 ( Hye-hwa Lee ),김정미 ( Jeong-mi Kim ),임미하 ( Miha Im ),조재근 ( Jae-keun Cho ) 한국동물위생학회 2024 한국동물위생학회지 (KOJVS) Vol.47 No.1
At the present study, it was aimed to explore the states of antimicrobial resistant Staphylococcus aureus isolates from 1,360 chickens, pigs and cattle carcass (400 chickens, 480 pigs and 480 cattle) in Daegu province from January 2022 to December 2022. Among 1,360 samples, 81 of S. aureus were isolated cattle (1.4%), pigs (7.7%) and chickens (9.2%). In antimicrobial susceptibility test, all of the isolates were demonstrated susceptibility to rifampin. But the isolates were showed resistance other antibiotics in order of tetracycline (62.9%), ciprofloxacin (62.9%), tobramycin (58.0%), gentamicin (51.8%), amikacin (40.7%), penicillin (39.5%), clindamycin (35.8%), enrofloxacin (33.3%), trimethoprim/sulfamethoxazole (30.8%), oxacillin (30.8%), minocycline (29.6%), erythromycin (25.9%), quinupristin/dalfopristin (20.9%), chloramphenicol (12.3%), cefoxitin (9.8%). Among the 81 S. aureus isolates, 25 (30.8%) methicillin-resistant staphylococcus aureus (MRSA) were observed. Seven (28.0%) of 25 MRSA harbored mecA gene. About 96% of MRSA were multidrug resistance to at least 3 more drugs. A continuous monitoring and surveillance program to prevent antimicrobial resistance in livestock products is demanded.