microbial drug resistance

..Therefore, the isolates revealed little evidence of clonal spread and may have emerged in direct response to the selective pressure exerted by prior fluoroquinolone use...

..However, optimal use from the perspective of the community (reserving newer agents for future use) is not always consistent with optimal use from the perspective of the individual patient (prescribing newer, broader agents)...

..These results highlight the need for early intervention once resistance is detected...

..Vaccine escape by genetic recombination at the capsular locus has the potential to reduce PCV7 effectiveness in the longer term...

..For example, modification of enzymes which serve as targets for antimicrobial action and the involvement of membrane pumps in the extrusion of drugs are well characterized in both the eukaryotic and prokaryotic cells...

..Since the study of antifungal drug resistance is relatively new, other factors that may also contribute to resistance are discussed...

..Our results demonstrate that directed evolution coupled with structural analysis can be used to predict future mutations that lead to increased antibiotic resistance...

..This represents a form of DNA mimicry and explains both its inhibitory effect on DNA gyrase and fluoroquinolone resistance resulting from the protein's expression in vivo...

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..This network can serve as a prototype for the collaboration of scientists in identifying clones of important human pathogens and as a model for the development of other networks...

..tuberculosis to PZA and that the natural PZA resistance of M. smegmatis is due to a highly active efflux pump. These findings may have implications with regard to the design of new antimycobacterial drugs...

..We propose that the size and complexity of the P. aeruginosa genome reflect an evolutionary adaptation permitting it to thrive in diverse environments and resist the effects of a variety of antimicrobial substances...

..6%) and M. catarrhalis (86.2%-96.8%) also varied by region. Notable variation in regional antimicrobial resistance rates (S. pneumoniae) and beta-lactamase production (H. influenzae, M. catarrhalis) exists throughout the United States...

..coli GyrA, is substituted to Phe or Tyr in both high- and low-quinolone-resistant isolates. We propose that DNA topoisomerase IV is a primary target of fluoroquinolones in S. aureus...

..MfpA binds to DNA gyrase and inhibits its activity. The rod-shaped, dimeric protein exhibits remarkable similarity in size, shape, and electrostatics to DNA...

..This family of elements appears formally distinct from other known mobile DNA elements and we propose the name DNA integration elements, or integrons...

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..However, the vaccine is underutilized, and a substantial reduction in the morbidity and mortality associated with invasive pneumococcal infections is unlikely until the vaccine is used more widely among persons at risk for disease...

..smegmatis mutant strain lacking an intact mfpA gene than for the WT strain, suggesting that, by some unknown mechanism, the gene product plays a role in determining the innate level of FQ(R) in M. smegmatis...

..Programmes monitoring the occurrence and development of resistance and consumption of antimicrobial agents are strongly desirable, as is research into the most appropriate ways to use antimicrobial agents in veterinary medicine...

..It forms a trimer that interacts with a monomeric AcrB, which was shown by in vitro reconstitution to be a proton antiporter. Details of interaction between the..

..These studies indicate that there is considerable flux in the antibiotic resistance genes found in the SXT family of constins and point to a model for the evolution of these related mobile elements...

..Antibiotic-resistant enterococci are often present in retail meats, but it is unclear whether the ingestion of these contaminants leads to sustained intestinal carriage...

..This backbone represents a scaffold for the mobilization of genetic material between a wide range of gram-negative bacteria, allowing for rapid adaptation to changing environments...

..jejuni infection, but its incidence is <1 per 1000 infections. Careful food preparation and cooking practices may prevent some Campylobacter infections...

..burgdorferi complex. The excellent in vitro effectiveness of acylamino-penicillin derivatives and their suitability for the therapy of Lyme disease is emphasised...

..In contrast with the results obtained with clinical isolates, a variety of gyrA mutations were obtained in vitro...

..These findings demonstrate the potential of such proteins to be used in screening of large chemical libraries for inhibitors which could be further developed to novel broad-spectrum antibiotics...

..Increasing numbers of treatment failures have been noted. Most infections have been in patients with a recent history of travel to India and Pakistan...

..Because the L-Ara4N unit attached to lipid A is not derivatized with a formyl group, we postulate the existence of a deformylase, acting later in the pathway...

..Isolates from both cattle and humans harbored an R plasmid of 65 kb (pTMS1) that may have been transferred between them due to selective antibiotic pressure in the farm environment...

..All of the diverse genes and the high quality sequence of Mu50 can be viewed at the web site (http://133.5.48.239/VRSA/)...

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..Telithromycin therefore represents an important addition to the therapeutic armamentarium in an era of increasing antimicrobial resistance, with an expected low likelihood of the development of resistance in clinical use...

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..Our analyses of the external surfaces of VceC and other channel proteins suggest that different classes of efflux pumps have distinct architectures. We discuss the implications of these findings for mechanisms of drug and protein export...

..However, the optimal regimen and duration are unclear. Study objective: To analyze the efficacy of treatment regimens used for INHr-TB in the southeastern Texas region...

..To express the views of a working party held to consider antibiotic resistance surveillance systems, their strengths and weaknesses, and their current and future applications...

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..Among pneumococci, low-level resistance to macrolides can lead to clinical failure, and resistance to macrolides should be considered during the selection of empiric therapy for patients with presumed pneumococcal infections...

..The blood culture isolate of MRSA exhibited reduced susceptibility to vancomycin (MIC, 8 microg/ml). This is the first report of a vancomycin-intermediate S. aureus case from Korea...

..These isolates showed broad cross-resistance to thiocarbonyl containing drugs including ETA, thiacetazone, and thiocarlide...

..tuberculosis and promising oral activity in animal infection models. We conclude that nitroimidazopyrans offer the practical qualities of a small molecule with the potential for the treatment of tuberculosis...

..If we are to address the antimicrobial resistance crisis, a concerted, grassroots effort led by the medical community will be required...

..The results of this analysis, which might be applicable to other emerging public health problems, demonstrate the growing interest in mathematical modelling approaches to evaluate antibiotic resistance...

..The kanamycin resistance marker allows efficient direct selection of mutants in B. burgdorferi and hence is a significant improvement in the ability to construct isogenic mutant strains in this pathogen...

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..We propose that the Rcs pathway responds to peptidoglycan damage and contributes to the intrinsic resistance of E. coli to beta-lactam antibiotics...

..These results suggest that InhA is likely a primary target of action for INH and ETH...

..These various aspects of bacterial resistance to antibiotics will be explored in this presentation...

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..In addition to the mefA gene, the recently sequenced ermTR gene was also widely distributed among isolates of different clonal origin...

..Nonetheless, INH appeared to resemble TLM more closely in overall mode of action, and KasA levels appeared to be tightly correlated with INH sensitivity...

..Careful, focused attention to this problem at the local ICU level, using a multidisciplinary approach, will have the greatest likelihood of limiting the development and dissemination of antibiotic-resistant infections...

..A retrospective clinical study of all patients treated for non-MDR-TB isoniazid-resistant organisms was undertaken...

..Functional genomics and integrative biology should validate these targets and provide the best opportunity for developing effective new therapies, improved diagnostic techniques, and better tools to understand host-pathogen interactions...

..The final section highlights some unresolved questions and presents a way forward on issues requiring urgent attention...

..aureus subpopulations exhibiting decreased glycopeptide susceptibility and growing in the presence of otherwise inhibitory concentrations of these antimicrobial agents...

..isolate, and an Enterococcus sp. isolate had their mef(A) genes completely sequenced and showed 100% identity at the DNA and amino acid levels with the mef(A) gene from S. pneumoniae...

..Overuse of antibiotics for children's upper respiratory infections is widespread and contributes to the emergence of antibiotic-resistant bacteria...

..The data also indicate that IPD varies by serotype, age, and country, emphasizing that the epidemiology of IPD is heterogeneous and requires continued surveillance...

..Clindamycin remains a treatment option if the clinician is notified of the risk by the microbiology laboratory and the clinical situation is suitable...

..catarrhalis in CARTI, and high fluoroquinolone potency/spectrum (>97% susceptible). beta-lactams and macrolides continue to be compromised by increasing resistances in pathogens isolated in these monitored primary care settings...

..e., the entire recommended dosing interval, and below the free drug concentration for at least 8 h...

..The remaining 14 strains were more heterogeneous and had mutations only in parC and/or parE, and the MICs of quinolones were lower for these strains...

..The results indicate that the empirical treatment of spontaneous bacterial peritonitis should differ for nosocomial and community-acquired cases...

..Regional infection control strategies may need to be developed to limit the spread of the ORSA clone endemic to this area...

..The following reviews deals with new substances such as carbapenems, quinolones, ketolides, oxazolidinones, glycylcyclines, echinocandines and azoles...

..It appears that each class of plasmid carries different types of drug resistance genes. Analysis of such genes will reveal the multiple mechanisms involved in multidrug resistance in S. marcescens...

..A BLAST search suggested that such a heteromultimer-type RND exporter constitutes a unique family among gram-negative organisms...

..Topical ciprofloxacin is safe and more efficacious and efficient than topical gentamicin in the treatment of acute exacerbation of chronic suppurative otitis media...

..The present results, when taken together with the recently reported pharmacological activities, provide for a rationale basis of the utilization of EPs 7630 in the treatment of respiratory tract infections...

..This study indicates importance of the D-zone test in detecting inducible clindamycin resistance in staphylococci to aid in the optimal treatment of patients...

..However, the introduction of fluorine (analogue 34) on the already potent non-fluorine thiocarbamate 21 did not have any influence on the activity...

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..Data from the checkerboard titer test confirmed synergism between the antibiotic, norfloxacin, and T. magnus oil or thymol, particularly against the resistant strains of S. aureus...

..We evaluated three lots of GC agar medium base produced by BIOCEN, Cuba, in antibiotic susceptibility testing of reference and wild strains of gonococci...

..Initial therapy should have a high likelihood of covering resistant pathogens...

..The in vitro antimicrobial activities of new fluoroquinolones were tested against quinolone-resistant Haemophilus influenzae of clinical isolates...

..CONCLUSIONS: Lansoprazole-amoxicillin-metronidazole triple therapy is an effective and promising second-line H. pylori eradication therapy in a north Japanese population, which has a low frequency of metronidazole resistance...

..reaction: see text] The expedient synthesis of a library of kanamycin B analogues is reported. The revealed SAR will guide future designs in developing kanamycin-type aminoglycoside antibiotics against drug-resistant bacteria...

..This leads us to the conclusion that antibiotic resistance pattern should be interpreted by the bacteriologist and a consistent policy concerning the use of antimicrobial drugs in hospital settings should be instituted...

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..The antibacterial activities were evaluated in standard in vitro MIC assay method. Some of the compounds showed in vitro (MIC) antibacterial activity comparable to those of Gatifloxacin, Ciprofloxacin, and Sparfloxacin...

..Paratyphi A abruptly increased in the New Delhi region. In the first 6 months of 1999, 32% of isolates were resistant to both chloramphenicol and cotrimoxazole and another 13% were resistant to more than two antibiotics...

..These data can be used as a baseline to determine antibiotic resistance rates after implementation of the growth promotor ban in 1999 in Switzerland...

..Although the prognosis for infection in neutropenic patients has improved greatly, new infectious problems have emerged that limit our successful management of these complications...

..In this small series, when appropriate therapy was initiated,Nocardia keratitis resolved promptly with good visual recovery...

..A. baumannii was the least susceptible species (67.42%). This study indicate that cefepime may play an important role in therapy of nosocomial infections in particular caused by Enterobacteriace...

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..In this review, we discuss patterns of susceptibility of different antimicrobials as experienced at King Faisal Specialist Hospital and Research Centre, a tertiary care center in Riyadh...

..pneumoniae ATCC 49619 harbor mutations in defB but not in fmt. Reintroduction of the mutated defB gene into wild-type S. pneumoniae R6x recreates the resistance phenotype. The altered enzyme displays decreased sensitivity to actinonin...

..We identified a gene responsible for the susceptibility of Escherichia coli cells to killing by glycolipid derivatives of vancomycin, thus establishing a genetic basis for activity differences between these compounds and vancomycin...

..Even though the rate of mupirocin resistance in MRSA is still low in Malaysia, its presence calls for a strict policy on mupirocin usage in Malaysian hospitals...

..This analysis is regarded as an "infotyping", in contrast to serotype or genotype, of clinical microbial isolates, which is useful for nosocomial infection surveillance...

..Compound GB12 was the most effective in enhancing the activity of Er, and was selected for plasmid elimination studies. However, GB12 itself had no antiplasmid effect and did not alter the promethazine induced plasmid elimination...

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..Finally, a cohort study will be completed within the study design, by examining outcomes for all patients, stratifying by pneumococcal drug susceptibility and adequacy of antimicrobial drug coverage. ..

..This research will increase our understanding of microbial drug resistance, enable the tracking of new drug resistant organisms, and provide a measurement and surveillance utility ..

..that the proposed research will (i) yield one or more highly potent, optimized polymer-attached inhibitor(s) for future clinical development and (ii) provide a new paradigm of drug development for overcoming microbial drug resistance

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..b>Microbial drug resistance, emerging infections, use of microbes as bioterrorism weapons, and acquired immunodeficiency syndrome (..

..This approach will be used to detect and develop new antimicrobial agents as well as study a new class of RNA molecules that are toxic to bacteria. ..

..influenzae infections; 5) and enhanced validation of existing targets in H. influenzae. ..

..Aim 4: Determine the cost-effectiveness of three different infection control interventions. ..

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..The goal of this work is to design tools that will aid in understanding and generalizing the output of computationally complex models of disease transmission. ..

..The second aim will be done by combining epidemiological relatedness and molecular relatedness through pulse-field gel electrophoresis of ESBL cultures to quantify the importance of patient to patient transmission. ..

..This will in turn lead to better practices to reduce the incidence of ARNI. ..

..The reasons for the emergence of A. baumannii are unknown and no interventions have been successful at curbing this emergence. For these reasons, A. baumannii is a significant public health problem. ..

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..Molecular epidemiologic methods will trace the origin of resistant strains in nursing homes and further characterize newer strains of MDROs emerging and spreading in this often neglected setting. ..

..These evaluationswill be a focal point of discussion in the Faculty Development Seminar, and suitable program modifications will be implemented by the Leadership Team. ..

..As the $29 DNA polymerase is homologous to those of several human pathogenic viruses, knowledge of its structure may yield insights into designing inhibitors of these pathogenic polymerases. ..

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..They will also yield important new information on mechanisms of cell wall synthesis in E. faecium and other Gram-positive bacteria as well as on the mechanisms by which ampicillin resistance in E. faecium is regulated. ..

..Crystallographic studies of both full length HIV integrase and the homologous transposase, TN552, complexed with suitable DNA substrates are aimed to produce mechanistic insights. ..

..The analyses will match patients with resistant infections (hospital- and community-acquired) to susceptible patients and to uninfected patients. _^ ..

..Accomplishing the goals of this project will be the first stage in developing a broader study of gene-environment interactions in autism, as well as a targeted search for candidate genes related to mercury susceptibility in humans. ..

..3. Broadly test the scaffold and derived libraries of novel compounds using the extensive set of assays in place at the Hans-Knoll Institute for Natural Products Research (HKI). ..

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..Excellent research facilities equipped with state-of-the-art instrumentation Strong institutional commitment, with the University of Notre Dame providing a fellowship match in a 1:1 ratio and stipend supplementation of trainees ..

..2. To utilize high throughput methods to examine patterns of DNA methylation in candidate genes in sperm and zygote in order to detect the presence of male-mediated effects on imprinted genes involved in early development. ..

..tuberculosis and will begin to describe relationships between DNA supercoiling and virulence in M. tuberculosis. The work is expected to help guide efforts to develop new, more effective anti-tuberculosis agents...

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..Data generated from the proposed experiments will advance our understanding of the mechanisms regulating sebum production and can lead to identification of potential additional therapeutic target sites in the treatment of acne. ..

..The AIMS of study are to 1) investigate visceral hypersensitivity using barostat examination of the pouch; 2) conduct a randomized, placebo-controlled clinical trial evaluating the use of amitriptyline in IPS. ..

..Specific Aim 2: To evaluate the impact of a rapid diagnostic test for c-reactive protein on antibiotic use for adults with acute cough illness when added to a multidimensional intervention. ..

..pneumoniae infections in and outside the intervention communities. Specific Aim IIIC: Conduct a net-cost analysis of the different levels of community education. ..