• Title, Summary, Keyword: Antimicrobials

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Characteristics of antimicrobial resistant Salmonella Typhimurium isolates from pigs (돼지에서 분리한 Salmonella Typhimurium의 항생제 내성 양상)

  • Sohn, Jun Hyung;Kim, Mee Suk;Lee, Young Mi;Do, Jae Cheul
    • Korean Journal of Veterinary Service
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    • v.40 no.2
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    • pp.83-87
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    • 2017
  • 59 strains of Salmonella enterica subspecies enterica serovar Typhimurium (S. Typhimurium) were isolated from pigs in Gyeongbuk province, collected from 2011 to 2016. The isolates were investigated for the presence of antimicrobial resistance and multi drug resistance patterns. All 59 S. Typhimurium isolates were resistant to at least one of 10 antibiotics used in this study, 100% of S. Typhimurium isolates from pigs were resistant to two or more antimicrobials. As many as 5 isolates of isolates from pigs were resistant to 8 of 10 antimicrobials tested in this study. The ACSTNaGmKNaCf, ACSTGmAuKT/S, ACSTGmKCfT/S resistance phenotype was observed in 3.4%, 3.4%, 1.7% of the 59 isolates, respectively.

Interpretation of Antimicrobial Susceptibility Test According to Resistance Mechanism of ${\beta}$-lactam in Enterobacteriacae (장내세균에서 ${\beta}$-lactam 항균제의 내성기전별 항균제 감수성검사의 해석)

  • Lee, Chae-Hoon
    • Yeungnam University Journal of Medicine
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    • v.27 no.1
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    • pp.8-17
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    • 2010
  • It is important to select appropriate antimicrobials for the treatment of infection according to the results of antimicrobial susceptibility tests (ASTs), yet the clinical isolates are sometimes susceptible to antibiotics that are clinically ineffective or this is due to technical error of the ASTs. So, interpretive reading of ASTs is needed and especially for the ${\beta}$-lactams for treating $Enterobacteriacae$. This review describes the interpretive reading of ASTs according to natural antimicrobial resistance and the mechanisms of mechanisms, with giving special attention to the antibiotics phenotypes for $Enterobacteriacae$. Further, as all the diffent tissues have a different antimicrobial concentration for identical antimicrobials, more information is needed on the antimicrobial tissue distribution for the appropriate treatment of infection. (ED note: I hope you send me the paper.)

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Packaging of Bread in Paper Made From Edible Red Algae and Coated with Antimicrobials Retards Microbial Growth in Bread during Storage

  • Ku, Kyoung-Ju;Hong, Yun-Hee;Seo, Yung-Bum;Song, Kyung-Bin
    • Preventive Nutrition and Food Science
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    • v.13 no.1
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    • pp.51-53
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    • 2008
  • To utilize edible red algae paper for food packaging, red algae paper coated with green tea extract or catechin was prepared and microbial growth in bread wrapped with the paper was determined during storage. The paper coated with green tea extract or catechin had antimicrobial activity against Escherichia coli. Packaging of bread with the red algae paper coated with green tea extract or catechin decreased the populations of total aerobic bacteria and yeast and mold after 2 days of storage by 0.41 and 0.63 log CFU/g, respectively, compared to the control. These results suggest that bread can be packaged by edible red algae paper coated with green tea extract or catechin, resulting in inhibit microbial growth during storage.

Burkholderia Diversity and Versatility: An Inventory of the Extracellular Products

  • Vial, Ludovic;Groleau, Marie-Christine;Dekimpe, Valerie;Deziel, Eric
    • Journal of Microbiology and Biotechnology
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    • v.17 no.9
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    • pp.1407-1429
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    • 2007
  • The Burkholderia genus consists of over 40 Gram-negative, ${\beta}$-proteobacteria species that occupy remarkably diverse ecological niches. This genus contains species pathogenic to human, animals, and plants, as well as species involved in promoting plant growth and biodegradation of pollutants. This is largely explained by the extraordinary versatility of Burkholderia, as reflected by the remarkable diversity of extracellular products released by these bacteria. We exhaustively surveyed the extracellular enzymes, siderophores, toxins, antimicrobials, and other secondary metabolites produced by the members of this very diverse genus. Available information on regulation, especially quorum sensing mechanisms, and secretion is highlighted.

Bacterial contaminants in extended boar semen and selection of effective antimicrobials (돼지 희석정액의 세균오염도 및 유효 항생제 선발)

  • Kim, Ha-Young;Byun, Jae-Won;Shin, Dong-Ho;Kim, Hyoung-Soon;Yoon, Hachung;Park, Choi-Kyu;Lee, O-Soo;Jung, Byeong Yeal
    • Korean Journal of Veterinary Research
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    • v.50 no.2
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    • pp.125-131
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    • 2010
  • Bacterial contamination is an unavoidable finding of the semen collection process in boar and can lead in deleterious effects on semen quality and longevity if left uncontrolled. The purpose of this study is to identify the bacteria in extended boar semen and to select the effective antimicrobials to control of the contaminants. Of 116 extended boar semen samples submitted from eight AI centers in Korea, 39 (33.6%) samples were positive for bacterial contamination. Among 39 contaminated semen, most of them (84.6%) were contaminated with one or two bacterial species and there was no significant difference between two age groups $(\leq\;24\;and\;>\;24\;month\;old).$ Stenotrophomonas maltophilia (n = 18) was the most predominant bacterium followed by Elizabethkingia meningoseptica (n = 12), Sphingomonas paucimobilis (n = 12), Myroides spp. (n = 5), Ochrobactrum anthropi (n = 3), and so on. Enrofloxacin (72.9%), florfenicol (72.9%), bacitracin (49.2%) and tylosin (49.2%) showed higher sensitivity compared with penicillin (13.6%) or aminoglycosides (6.8%-18.6%). Brucella spp., Leptospira spp., Mycoplasma hyopneumoniae, Mycoplasma hyorhinis, Mycobacterium tuberculosis complex were not detected in semen by PCR.

Prediction of Listeria monocytogenes Growth Kinetics in Sausages Formulated with Antimicrobials as a Function of Temperature and Concentrations

  • Bang, Woo-Suk;Chung, Hyun-Jung;Jin, Sung-Sik;Ding, Tian;Hwang, In-Gyun;Woo, Gun-Jo;Ha, Sang-Do;Bahk, Gyung-Jin;Oh, Deog-Hwan
    • Food Science and Biotechnology
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    • v.17 no.6
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    • pp.1316-1321
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    • 2008
  • This study was conducted to develop a model to describe the effect of antimicrobials [potassium sorbate (PS), potassium lactate (PL), and combined PL and sodium diacetate (SDA, PLSDA)] on the growth parameters of Listeria monocytogenes such as specific growth rate (SGR) and lag phase periods (LT) in air-dried raw sausages as a function of storage temperature (4, 10, 16, and $25^{\circ}C$). Results showed that the SGR of L monocytogenes was dependent on the storage temperature and level of antimicrobials used. The most effective treatment was the 4% PLSDA, followed by the 2% PLSDA and 4% PL and 0.2% PS exhibited the least antimicrobial effect. Increased growth rates were observed with increasing storage temperatures from 4 to $25^{\circ}C$. The growth data were fitted with a Gompertz equation to determine the SGR and LT of the L. monocytogenes. Six polynomial models were developed for the SGR and LT to evaluate the effect of PS (0.1, 0.2%) and PL (2,4%) alone and PLSDA (2, 4%) on the growth kinetics of L. monocytogenes from 4 to $25^{\circ}C$.

Antimicrobial resistance and transfer of R plasmid of pathogenic Eseherichia coli isolated from poultry in Korea (가금 유래 병원성 대장균의 항균제 내성 및 R plasmid 전달 양상)

  • Sung, Myung-Suk;Kim, Jin-Hyun;Cho, Jae-Keun;Seol, Sung-Yong;Kim, Ki-Seuk
    • Korean Journal of Veterinary Research
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    • v.48 no.3
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    • pp.275-285
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    • 2008
  • Antimicrobial drugs are widely used in poultry industry as growth promoters or to control infectious diseases. However, this practice is reported to have caused high resistance to antimicrobial drugs in normal chicken flora and pathogens. Antimicrobial resistance to Escherichia coli (E. coli) from chicken has been mainly reported in normal flora, but rare in pathogenic organism in Korea, recently. Therefore, this study was conducted to investigate prevalence of antimicrobials resistance, transfer of R plasmid, and association between antimicrobial drug resistance and O serotype of 203 pathogenic E. coli from poultry in Korea during the period from April 2003 to December 2005. These isolates showed a high resistance to tetracycline (Tc, 93.6%), nalidixic acid (Na, 92.6%), streptomycin (Sm, 81.8%), ampicillin (Ap, 77.3%), ciprofloxacin (Ci, 70.9%), sulfisoxazole (Su, 66.5%), and trimethoprim (Tp, 58.1%). Two hundred-one (99.0%) of the isolates were resistant to one or more drugs. They showed 57 different resistant patterns, and the most prevalent resistant pattern among them was Tc, Sin, Su, Ap, Tp, Ci, Na. Sixty-eight (33.8%) of the isolates transferred all or a part of their antimicrobial resistant pattern to the recipient strain by R plasmid. The most common antimicrobial resistant pattern was Tc, Sm, Su, Ap, Tp, Ci, Na in serotype O78, O88 and O15, respectively. These results exhibit high individual and multiple resistance to antimicrobials of pathogenic E. coli from poultry in Korea. They also suggest the needs for surveillance to monitor antimicrobial resistance in pathogenic bacteria that can be potentially transmitted to humans from food animals and to regulate the abuse of antimicrobials on food-producing animals in Korea.

Perspectives for the Industrial Use of Bacteriocin in Dairy and Meat Industry (축산업 분야에서의 박테리오신의 산업적 이용 및 향후 전망)

  • Lee, Na-Kyoung;Lee, Joo-Yeon;Kwak, Hyung-Geun;Paik, Hyun-Dong
    • Food Science of Animal Resources
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    • v.28 no.1
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    • pp.1-8
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    • 2008
  • More safe and natural food was recently needed by consumers. Antimicrobials including sodium azide, penicillin, and vancomycin were used for therapeutic agents against pathogens such as Listeria monocytogenes, Staphylococcus aureus, Escherichia coli O157:H7 in dairy and meat industry. These antimicrobials and preservatives were prohibited in stock farm and food because they were caused resistant strain and side effects. Bacteriocins are proteinaceous compounds that may present antimicrobial activity towards important food-borne pathogens and spoilage-related microflora. Therefore, bacteriocins were reported as an alternative of antimicrobials. Due to these properties, bacteriocin-producing strains or purified bacteriocins have a great potential of use in biologically based food preservation systems. Despite the growing number of articles regarding on the isolation of bacteriocinogenic strains, genetic determinants for production, purification and biochemical characterization of these inhibitory substances, there are only limited reports of successful application of bacteriocins to dairy and meats. This review describes bacteriocins related to dairy and meat products for the further use.