• 제목/요약/키워드: Multidrug-resistant Staphylococcus aureus

검색결과 79건 처리시간 0.025초

A Peptide Antibiotic AMRSA1 Active against Multidrug-resistant Staphylococcus aureus Produced by Streptomyces sp. HW-003

  • Lee, Hyeon-Woo;Choi, Jong-Whan;Kim, Hyun-Won;Han, Dong-Pyou;Shin, Woon-Seob;Yi, Dong-Heui
    • Journal of Microbiology and Biotechnology
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    • 제7권6호
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    • pp.402-408
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    • 1997
  • The antibiotic-producing strain HW-003 was screened from soil and found to be effective against the multidrug-resistant Staphylococcus aureus. The spore chain of HW-003 was retinaculiaperti, and the spore surface was spiny. Strain HW-003 has a LL-diaminopimelic acid isoform in the cell wall. The aerial mass color of the strain was gray, and the reverse side was yellow-brown. The strain produced melanin, but did not produce soluble pigments. According to the Taxon program, HW-003 showed best match with Streptomyces cyaneus. Antibiotic production reached a maximum after 72-h cultivation. The antibiotic was purified with silica gel column chromatography, octadecylsilyl column chromatography, and HPLC. The purified antibiotic, AMRSA1, showed strong inhibitory activity against multidrug-resistant Staphylococcus aureus and gram-positive bacteria. The molecular weight of AMRSA1 was about 1, 100. AMRSA1 was a peptide antibiotic containing alanine and serine.

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다제내성 Staphylococcus aureus에 항균활성을 나타내는 CNU30122 균주가 생산하는 항생물질 (An Antibiotic against Multidrug-resistant Staphylococcus aureus Produced by Strain CNU30122)

  • 윤봉식;조수묵;김창진;유익동
    • Applied Biological Chemistry
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    • 제38권6호
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    • pp.577-580
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    • 1995
  • 다제내성 Staphylococcus aureus균주에 강력한 항균활성을 나타내는 CNU30122 균주를 선발하였다. 선발된 CNU30122균주의 배양액 추출물로부터 Diaion HP-20 column chromatograpy, ethylacetate 추출, silica gel 및 Sephadex LH-20 column chromatography, HPLC 등에 의해 백색분말의 순수한 화합물을 분리정제 하였다. 본 물질의 구조분석을 위하여 $^1H$$^{13}C\;NMR,\;DEPT,\;^1H-^1H\;COSY,\;^1H-^{13}C\;COSY$ 및 HMBC spectrum을 분석한 결과 본 물질은 분자량 516, 분자식 $C_{31}H_{48}O_6$의 tetracyclic triterpenoic acid 계열인 fusidic acid로 동정 되었다. 본화합물은 streptomycin, pecicillin, kanamycin, tetracycline 등의 약제에 내성균주인 Staphylococcus aureus R209 균주에 선택적으로 강한 항균활성을 나타내었다.

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국내 200병상이상 의료기관의 다약제 내성균 감염관리 실태조사 (Current Status of Infection Control of Multidrug Resistant Organisms in Hospitals with more than 200beds in the Republic of Korea)

  • 오향순
    • 보건의료산업학회지
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    • 제8권4호
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    • pp.163-173
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    • 2014
  • This study was performed to investigate the current status of isolation precautions of multidrug resistant organisms(MDROs) in general hospitals with more than 200bed. The questionnaires were mailed from 3rd, April 2013 to 30th, April 2013. Methicillin resistant Staphylococcus aureus:(MRSA), vancomycin resistant Staphylococcus aureus:(VRSA), vancomycin resistant Enterococcus(VRE), multidrug-resistant Acinetobacter baumannii, carbapenem-resistant Enterobacteriaceae multidrug-resistant Pseudomonas aeruginosa were enrolled. MRSA(100.0%) and VRE(98.7%) were isolated respectively. VRE(97.3%) and MRSA(64.0%) were regulated strictly respectively. VRE(91.5%) and VRSA(50.7%) were isolated in a single room respectively. Hospital being located in Seoul(p<0.001), and beds(${\geq}600$)(p=0.008) were different significantly. The isolation space limitation(71.1%) was the highest difficulty. The development of refunding the costs of the extra supplies and other hygienic materials for infection control was discovered as the most urgent strategy.

Small Multidrug Resistance(smr) 플라스미드 pKH4의 염기서열 결정 (Complete Nucleotide Sequence of Small Multidrug Resistance Plasmid pKH4)

  • 고창학;문경호
    • 약학회지
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    • 제43권6호
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    • pp.789-792
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    • 1999
  • The complete nucleotide sequence of pKH4, a small multidrug resistance (smr) plasmid isolated from multidrug resistant Staphylococcus aureus SA5, was determined. Sequence analysis has revealed that pKH4 has two open reading frames for Rep and Smr proteins. The comparison of the amino acid sequence of Smr protein of pKH4 with those of other Smr proteins of various Staphylococcus showed that Smr protein of pKH4 is a new member of the SMR family.

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Characterization of Cryptic Plasmid of Multidrug-resistant Staphylococcus aureus SA2

  • Im, Sung Hwan;Sung Joon Yoon;Woo Koo Kim;Chul Kyo Shin;Dae Woon Lee;Kyung Ho Moon
    • Journal of Microbiology and Biotechnology
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    • 제6권2호
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    • pp.145-146
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    • 1996
  • The 2.4-kb cryptic plasmid (pKH8) of multidrug-resistant Staphylococcus aureus SA2 was characterized by complete nucleotide sequencing and homology comparison. pKH8 was found to contain three open reading frames. Protein analysis of pKH8 showed that pKH8 was a multidrug resistance plasmid and mediated resistance to ethidium bromide and quaternary ammonium compounds.

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해양균류의 항균활성 검색 (Screening of Antimicrobial Activity from the Marine-Derived Fungus)

  • ;;최홍대;손병화
    • 생약학회지
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    • 제34권2호통권133호
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    • pp.142-144
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    • 2003
  • Acetone extracts of 301 strains of marine-derived fungus were tested for antimicrobial activity against three strains of bacteria. The bacteria consisted of three pathogens, Staphylococcus aureus, methicillin-resistant S. Aureus, and multidrug-resistant S. aureus. The acetone extracts of 10 strains (MFA117, MFA130, MFA134, MFA206, MFA217, MFA268, MFA277, MFA291, MFA292, MFA301) showed strong activity, inhibiting 100% of the bacterial growth. These antimicrobial active strains were cultlued in SWS medium on a 1 L scale and the resulting broth and mycelium were extracted to afford mycelium extract (000M) and broth extract (000B), respectively. Antimicrobial activity for all extracts has been tested as the results, the mycelium extract of one strain (217M) and the broth extracts of 9 strains (117B,130B, 134B, 206B, 268B, 277B, 291B, 292B, 301B) exhibited relatively high levels of activity at minimal inhibitory concentration (MIC) values of $500-125\;{\mu}g/mL$ range. Among them, the extracts, 277B, 291B, 292B and 301B showed the most significant antimicrobial activity with $IC_{50}$ values of $125\;{\mu}g/mL$.

다제내성 황색포도상구균이 가지고 있는 클로람페니콜 내성 플라스미드의 동정 (Characterization of Chloramphenicol Resistant Plasmid of Multidrug-resistant Staphylococcus aureus)

  • 이대운;문경호
    • 약학회지
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    • 제37권6호
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    • pp.621-624
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    • 1993
  • The clirical isolate Staphylococcus aureus SA2 had four kinds of plasmids and was resistant to ampicillin, chloroamphenicol, clindamycin. erythromycin, gentamicin, kanamycin, methicillin, streptomycin, tetracycline and tobramycin. Transformation experiment demonstrated that 4.14kb plasmid(pKH7) encoded resistance to chloramphenicol. The cleavage map of pKH7 was determined by restriction enzyme mapping techniques. The cleavage map is given for BstEll, Hindlll, Hpall, and Xbal. The above restriction endonucleases have a single site, but nucleases BamHl, Bgll, BglII, EcoRl, EcoRV, HaeIII, Hpal, Kpnl, Pstl, PvnII, Sall, Smal, and XhoI have no site on this plasmid.

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다제내성 황색포도상구균이 가지고 있는 테트라사이클린 내성 플라스미드의 동정 (Characterization of Tetracycline Resistance Plesmid of Multidrug-resistant Staphylococcus aureus)

  • 이대운;문경호
    • 약학회지
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    • 제39권1호
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    • pp.6-9
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    • 1995
  • The clinical isolate Staphylococcus aureus SA2 had four kinds of plasmids and was resistant to ampicillin, chloramphenicol, clindamycin, erythromycin, gentamicin, kanamycin, methicillin, streptomycin, tetracycline and tobramycin. Transformation experiment demonstrated that 4.44 kb plasmid(pKH6) encoded resistance to tetracycline. The cleavage map of pKH6 was determined by restriction enzyme mapping techniques. The cleavage map is given for EcoRV, HindIII, HpaI, HpaII, KpnI and Xbal. Restriction endonucleases BamHl, BglI, BGIII, BstEII, EcoRI, HaellI, PstI, PvuII, SalI, Smal, and Xhol have no site on this plasmid. The restriction map revealed extensive structural homology between pKH6 and pT181.

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Complete Genome Sequence of Staphylococcus aureus strain 21SAU_AGRO3 Isolated from Korean Agricultural Products

  • Sojin Ahn;Eunbyeol Ahn;So Yun Jhang;Misun Jeong;Sangryeol Ryu;Seoae Cho
    • 한국미생물·생명공학회지
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    • 제51권4호
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    • pp.555-558
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    • 2023
  • Staphylococcus aureus is a prominent multidrug-resistant pathogen known for its resistance to a variety of antibiotics. To combat this, a wide range of antibiotics, including quinolones, is utilized. While the efficacy of quinolones against S. aureus has been established, the rise in quinolone-resistant strains, particularly in methicillin-resistant S. aureus (MRSA), has necessitated a shift in their usage patterns. Genomic sequencing plays a crucial role as it offers insights into the genetic mechanisms of resistance. Thus, we report the complete genome sequence of an oxolinic acid-resistant strain of S. aureus isolated from sweet potato leaves, a crop commonly cultivated in Korea.

First Report on Multidrug-Resistant Methicillin-Resistant Staphylococcus aureus Isolates in Children Admitted to Tertiary Hospitals in Vietnam

  • Son, Nguyen Thai;Huong, Vu Thi Thu;Lien, Vu Thi Kim;Nga, Do Thi Quynh;Au, Tran Thi Hai;Nga, Tang Thi;Hoa, Le Nguyen Minh;Binh, Tran Quang
    • Journal of Microbiology and Biotechnology
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    • 제29권9호
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    • pp.1460-1469
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    • 2019
  • The extensive distribution of multidrug-resistant (MDR) methicillin-resistant Staphylococcus aureus (MRSA) poses a threat to healthcare worldwide. This study aimed to investigate the MDR and molecular patterns of MRSA isolates in children admitted to the two biggest tertiary care pediatric hospitals in northern and southern Vietnam. A total of 168 MRSA strains were collected to determine antibiotic susceptibility by minimum inhibitory concentration tests. Antibiotic-resistant genes, pulsed-field gel electrophoresis, staphylococcal cassette chromosome mec (SCCmec) typing, and multilocus sequence typing were used for the molecular characterization of MRSA. Among the total strains, the MDR rate (51.8%) was significantly higher in the northern hospital than in the southern hospital (73% vs. 39%, p < 0.0001). The MDR-MRSA with the highest rates were "ciprofloxacin-erythromycin-gentamicintetracyclines" (35.6%), followed by "erythromycin-tetracycline-chloramphenicol" (24.1%), and "ciprofloxacin-erythromycin-gentamicin" (19.5%), showing an accumulative total of 79.3%. The most susceptible antibiotics were rifampicin (100%) and vancomycin (100%), followed by doxycycline (94.0%), meropenem (78.0%), and cefotaxime (75.0%). The SCCmecII strains showed greater resistance to gentamicin, ciprofloxacin, tetracycline, meropenem and cephalosporins compared with the other strains. The SCCmecII strains exhibited the highest rate in the tested genes (aacA/aphD: 55.2%, ermA/B/C: 89.7%, and tetK/M: 82.8%). ST5-SCCmecII was the predominant clone in the northern hospital, whereas SCCmecIVa was more pronounced in the southern hospital. In conclusion, our results raised concerns about the predominant MDR-MRSA strains in the pediatric hospitals in Vietnam. The north-south difference in the antibiotic resistance patterns and genetic structure of MRSA suggests different MRSA origins and various uses of antimicrobial agents between the two regions.