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antibiotics resistant genes

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https://www.readbyqxmd.com/read/29342372/enrichment-of-antibiotic-resistance-genes-in-soil-receiving-composts-derived-from-swine-manure-yard-wastes-or-food-wastes-and-evidence-for-multi-year-persistence-of-swine-i-i-clostridium-i-i-spp
#1
Andrew Scott, Yuan-Ching Tien, Craig F Drury, W Daniel Reynolds, Edward Topp
The impact of amendment with swine manure composts (SMC), yard waste compost (YWC), or food waste compost (FWC) on the abundance of antibiotic resistance genes in soil was evaluated. Following a commercial-scale application of the composts in a field experiment, soils were sampled periodically for a decade, and archived air-dried. Soil DNA was extracted and gene targets quantified by qPCR. Compared to untreated control soil, all three amendment types increased the abundance of gene targets for up to four years post-application...
January 17, 2018: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/29342270/whole-genome-analysis-reveals-the-evolution-and-transmission-of-an-mdr-dh-nap11-106-clostridium-difficile-clone-in-a-paediatric-hospital
#2
Larry K Kociolek, Egon A Ozer, Dale N Gerding, David W Hecht, Sameer J Patel, Alan R Hauser
Background: Clostridium difficile strain DH/NAP11/106, a relatively antibiotic-susceptible strain, is now the most common cause of C. difficile infection (CDI) among adults in the USA. Objectives: To identify mechanisms underlying the evolution and transmission of an MDR DH/NAP11/106 clone. Methods: WGS (Illumina MiSeq), restriction endonuclease analysis (REA) and antibiotic susceptibility testing were performed on 134 C. difficile isolates collected from paediatric patients with CDI over a 2 year period...
January 12, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29341498/review-article-sepsis-in-the-emergency-department-part-2-investigations-and-monitoring
#3
REVIEW
Amith Shetty, Stephen Pj Macdonald, Gerben Keijzers, Julian M Williams, Benjamin Tang, Bas de Groot, Kelly Thompson, John F Fraser, Simon Finfer, Rinaldo Bellomo, Jonathan Iredell
Sepsis is characterised by organ dysfunction resulting from infection, with no reliable single objective test and current diagnosis based on clinical features and results of investigations. In the ED, investigations may be conducted to diagnose infection as the cause of the presenting illness, identify the source, distinguish sepsis from uncomplicated infection (i.e. without organ dysfunction) and/ or risk stratification. Appropriate sample collection for microbiological testing remains key for subsequent confirmation of diagnosis and rationalisation of antimicrobials...
January 16, 2018: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/29340452/detection-of-multidrug-resistant-pseudomonas-aeruginosa-harboring-bla-ges-1-and-bla-ges-11-in-recife-brazil
#4
Valdemir Vicente da Silva Júnior, Laura Durão Ferreira, Lílian Rodrigues Alves, Adriane Borges Cabral, Paula Regina Luna de Araújo Jácome, Paulo Sérgio Ramos de Araújo, Ana Catarina de Souza Lopes, Maria Amélia Vieira Maciel
INTRODUCTION: Pseudomonas aeruginosa, an important pathogen globally, presents several resistance mechanisms. This study aimed to investigate the presence of bla GES in clinical isolates of Pseudomonas aeruginosa obtained from various clinical specimens from patients admitted to three different hospitals in Recife, Brazil. The Guiana extended spectrum beta-lactamase (GES) enzymes are responsible for conferring broad spectrum resistance to beta-lactam drugs, including the carbapenems. METHODS: A total of 100 carbapenem-resistant P...
November 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29339831/detection-of-antimicrobial-resistance-genes-associated-with-the-international-space-station-environmental-surfaces
#5
C Urbaniak, A Checinska Sielaff, K G Frey, J E Allen, N Singh, C Jaing, K Wheeler, K Venkateswaran
Antimicrobial resistance (AMR) is a global health issue. In an effort to minimize this threat to astronauts, who may be immunocompromised and thus at a greater risk of infection from antimicrobial resistant pathogens, a comprehensive study of the ISS "resistome' was conducted. Using whole genome sequencing (WGS) and disc diffusion antibiotic resistance assays, 9 biosafety level 2 organisms isolated from the ISS were assessed for their antibiotic resistance. Molecular analysis of AMR genes from 24 surface samples collected from the ISS during 3 different sampling events over a span of a year were analyzed with Ion AmpliSeq™ and metagenomics...
January 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29339632/identification-of-rifampicin-resistance-mutations-in-escherichia-coli-including-an-unusual-deletion-mutation
#6
Eugene Y Wu, Angela K Hilliker
Rifampicin is an effective antibiotic against mycobacterial and other bacterial infections, but resistance readily emerges in laboratory and clinical settings. We screened Escherichia coli for rifampicin resistance and identified numerous mutations to the gene encoding the β-chain of RNA polymerase (rpoB), including an unusual 9-nucleotide deletion mutation. Structural modeling of the deletion mutant indicates locations of potential steric clashes with rifampicin. Sequence conservation in the region near the deletion mutation suggests a similar mutation may also confer resistance during the treatment of tuberculosis...
January 17, 2018: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29339424/clostridium-sordellii-pathogenicity-locus-plasmid-pcs1-1-encodes-a-novel-clostridial-conjugation-locus
#7
Callum J Vidor, Thomas D Watts, Vicki Adams, Dieter Bulach, Edward Couchman, Julian I Rood, Neil F Fairweather, Milena Awad, Dena Lyras
A major virulence factor in Clostridium sordellii-mediated infection is the toxin TcsL, which is encoded within a region of the genome called the pathogenicity locus (PaLoc). C. sordellii isolates carry the PaLoc on the pCS1 family of plasmids, of which there are four characterized members. Here, we determined the potential mobility of pCS1 plasmids and characterized a fifth unique pCS1 member. Using a derivative of the pCS1-1 plasmid from strain ATCC 9714 which had been marked with the ermB erythromycin resistance gene, conjugative transfer into a recipient C...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29339383/new-shuttle-vectors-for-gene-cloning-and-expression-in-multidrug-resistant-acinetobacter-species
#8
Massimiliano Lucidi, Federica Runci, Giordano Rampioni, Emanuela Frangipani, Livia Leoni, Paolo Visca
Understanding bacterial pathogenesis requires adequate genetic tools to assess the role of individual virulence determinants by mutagenesis and complementation assays, as well as for homologous and heterologous expression of cloned genes. Our knowledge of Acinetobacter baumannii pathogenesis has so far been limited by the scarcity of genetic tools to manipulate multi drug resistant (MDR) epidemic strains which are responsible for most of infections. Here, we report the construction of new multi-purpose shuttle plasmids, namely pVRL1 and pVRL2, which can efficiently replicate in Acinetobacter sp...
January 16, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29339308/antibiotic-resistance-and-virulence-traits-of-bacterial-pathogens-from-infected-freshwater-fish-labeo-rohita
#9
Dharmaraj Ramesh, Sami Souissi
Bacterial infectious diseases are a main dangerous problem in Aquaculture farming. It causes multiple diseases in fish as well as in human being and it has considerable virulence potential. In this connection, the moot of study focus to discriminate bacterial isolates recovered from naturally diseased Labeo rohita fish and their virulent characteristics. Based on the β-haemolysis factor, four isolates (KADR11, KADR12, KADR13 and KADR14) were selected for further delineation. These bacterial isolates showed high similarity with Providencia rettgeri, Aeromonas sp...
January 12, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29339296/silent-transmission-of-an-is1294b-deactivated-mcr-1-gene-with-inducible-colistin-resistance
#10
Kai Zhou, Qixia Luo, Qin Wang, Chen Huang, Haifeng Lu, Rossen W A John, Yonghong Xiao, Lanjuan Li
The global dissemination of the mobile colistin resistance mcr-1 is of special concern, as colistin is one of the last-resort antibiotics for the treatment of severe infections caused by carbapenem-resistant Gram-negative bacteria. Here, we characterized an inactive form of mcr-1 in a fluoroquinolone-resistant and colistin-susceptible uropathogenic Escherichia coli isolate (ECO3347). The mcr-1 gene was deactivated by the insertion of a 1.7-Kb IS1294b element flanked by two tetramers (GTTC), and located on a 62-Kb pHNSHP45-like plasmid (p3347-mcr-1)...
January 12, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29338693/in-vitro-antimicrobial-susceptibility-testing-of-human-brucella-melitensis-isolates-from-ulanqab-of-inner-mongolia-china
#11
Zhi-Guo Liu, Dong-Dong Di, Miao Wang, Ri-Hong Liu, Hong-Yan Zhao, Dong-Ri Piao, Zhong-Zhi Zhao, Yong-Qing Hao, Ya-Nan Du, Hai Jiang, Bu-Yun Cui, Xian-Zhu Xia
BACKGROUND: Brucellosis is an endemic disease in the Inner Mongolia Autonomous Region of China and Ulanqab exhibits the highest prevalence of brucellosis in this region. Due to the complex nature of Brucellosis, a cure for this disease has proven to be elusive. Furthermore, the reduced susceptibility of Brucella spp. to antimicrobial agents has been reported as a potential cause of therapeutic failure. However, detailed in vitro antimicrobial susceptibility patterns pertaining to Brucella isolates from this region have not yet been published...
January 16, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29337626/comparative-analysis-of-pasteurella-multocida-isolates-from-acute-and-chronic-fowl-cholera-cases-in-hungary-during-the-period-2005-through-2010
#12
Boglárka Sellyei, Ákos Thuma, Dmitriy Volokhov, Zsuzsanna Varga
Fowl cholera (FC) is a highly contagious and economically important disease of poultry worldwide. This study was performed on 218 Pasteurella multocida isolates collected from separated breeding farms or backyards with acute and chronic FC cases in multiple localities across Hungary during the period 2005-2010. All isolates were characterized by a broad range of biochemical, serological, and molecular methods, as well as their antibiotic susceptibility to aminoglycosides (A), macrolides (M), penicillins (P), quinolones (Q), cephalosporins, sulphonamides (S), and tetracyclines (T) was determined...
December 2017: Avian Diseases
https://www.readbyqxmd.com/read/29335824/broad-spectrum-resistance-of-pseudomonas-aeruginosa-from-shellfish-infrequent-acquisition-of-novel-resistance-mechanisms
#13
Ana Maravić, Ivica Šamanić, Matilda Šprung, Željana Fredotović, Nada Ilić, Josipa Dragičević, Jasna Puizina
Pseudomonas aeruginosa is one the most common multidrug-resistant pathogens worldwide. It has been previously detected in marine shellfish, but its antibiotic resistance in such environment has not been explored. By combining PCR detection of acquired genes, and resistance-nodulation-cell division (RND) efflux studying, we investigated the multifactorial resistance traits of 108 P. aeruginosa isolates recovered from wild-growing Mediterranean mussels (Mytilus galloprovincialis) in Croatia. Eleven different resistance profiles were found, with the main mechanism being the overexpression of intrinsic efflux pump(s), particularly MexAB-OprM...
January 15, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29335801/igm-augments-complement-bactericidal-activity-with-serum-from-a-patient-with-a-novel-cd79a-mutation
#14
Jeroen D Langereis, Stefanie S Henriet, Saskia Kuipers, Corry M R Weemaes, Mirjam van der Burg, Marien I de Jonge, Michiel van der Flier
Antibody replacement therapy for patients with antibody deficiencies contains only IgG. As a result, concurrent IgM and IgA deficiency present in a large proportion of antibody deficient patients persists. Especially patients with IgM deficiency remain at risk for recurrent infections of the gastrointestinal and respiratory tract. The lack of IgM in the current IgG replacement therapy is likely to contribute to the persistence of these mucosal infections because this antibody class is especially important for complement activation on the mucosal surface...
January 15, 2018: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/29335567/metagenomic-analysis-of-microbial-communities-yields-insight-into-impacts-of-nanoparticle-design
#15
Jacob W Metch, Nathan D Burrows, Catherine J Murphy, Amy Pruden, Peter J Vikesland
Next-generation DNA sequencing and metagenomic analysis provide powerful tools for the environmentally friendly design of nanoparticles. Herein we demonstrate this approach using a model community of environmental microbes (that is, wastewater-activated sludge) dosed with gold nanoparticles of varying surface coatings and morphologies. Metagenomic analysis was highly sensitive in detecting the microbial community response to gold nanospheres and nanorods with either cetyltrimethylammonium bromide or polyacrylic acid surface coatings...
January 15, 2018: Nature Nanotechnology
https://www.readbyqxmd.com/read/29335025/prevalence-of-a-carbapenem-resistance-gene-kpc-vancomycin-resistance-genes-van-a-b-and-a-methicillin-resistance-gene-meca-in-hospital-and-municipal-sewage-in-a-southwestern-province-of-saudi-arabia
#16
Vinod Kumar Basode, Ahmed Abdulhaq, Mohammed Uthman A Alamoudi, Hassan Mohammad Tohari, Waleed Ali Quhal, Aymen Mohammed Madkhali, Yahya Hasan Hobani, Almonther Abdullah Hershan
OBJECTIVE: According to the World Health Organization, the increasing antibiotic resistance of pathogens is one of the most important threats to human health. Prevalence of a carbapenem-resistance gene (KPC), vancomycin-resistance genes (van A/B) and a methicillin-resistance gene (mecA) in hospital and municipal sewages will be potential threat to public health. RESULTS: Vancomycin-resistance genes were detected in the sewage of community tank-II, sewage tank of the tertiary and general hospital...
January 15, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29335005/in-depth-resistome-analysis-by-targeted-metagenomics
#17
Val F Lanza, Fernando Baquero, José Luís Martínez, Ricardo Ramos-Ruíz, Bruno González-Zorn, Antoine Andremont, Antonio Sánchez-Valenzuela, Stanislav Dusko Ehrlich, Sean Kennedy, Etienne Ruppé, Willem van Schaik, Rob J Willems, Fernando de la Cruz, Teresa M Coque
BACKGROUND: Antimicrobial resistance is a major global health challenge. Metagenomics allows analyzing the presence and dynamics of "resistomes" (the ensemble of genes encoding antimicrobial resistance in a given microbiome) in disparate microbial ecosystems. However, the low sensitivity and specificity of available metagenomic methods preclude the detection of minority populations (often present below their detection threshold) and/or the identification of allelic variants that differ in the resulting phenotype...
January 15, 2018: Microbiome
https://www.readbyqxmd.com/read/29332216/characteristics-of-arg-carrying-plasmidome-in-the-cultivable-microbial-community-from-wastewater-treatment-system-under-high-oxytetracycline-concentration
#18
Yanhong Shi, Hong Zhang, Zhe Tian, Min Yang, Yu Zhang
Studies on antibiotic production wastewater have shown that even a single antibiotic can select for multidrug resistant bacteria in aquatic environments. It is speculated that plasmids are an important mechanism of multidrug resistance (MDR) under high concentrations of antibiotics. Herein, two metagenomic libraries were constructed with plasmid DNA extracted from cultivable microbial communities in a biological wastewater treatment reactor supplemented with 0 (CONTROL) or 25 mg/L of oxytetracycline (OTC-25)...
January 13, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29331890/deep-sequence-analysis-reveals-the-ovine-rumen-as-a-reservoir-of-antibiotic-resistance-genes
#19
Thomas C A Hitch, Ben J Thomas, Jessica C A Friedersdorff, Helen Ougham, Christopher J Creevey
Antibiotic resistance is an increasingly important environmental pollutant with direct consequences for human health. Identification of environmental sources of antibiotic resistance genes (ARGs) makes it possible to follow their evolution and prevent their entry into the clinical setting. ARGs have been found in environmental sources exogenous to the original source and previous studies have shown that these genes are capable of being transferred from livestock to humans. Due to the nature of farming and the slaughter of ruminants for food, humans interact with these animals in close proximity, and for this reason it is important to consider the risks to human health...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29330592/genomic-characterization-of-key-bacteriophages-to-formulate-the-potential-biocontrol-agent-to-combat-enteric-pathogenic-bacteria
#20
Krupa M Parmar, Nishant A Dafale, Hitesh Tikariha, Hemant J Purohit
Combating bacterial pathogens has become a global concern especially when the antibiotics and chemical agents are failing to control the spread due to its resistance. Bacteriophages act as a safe biocontrol agent by selectively lysing the bacterial pathogens without affecting the natural beneficial microflora. The present study describes the screening of prominent enteric pathogens NDK1, NDK2, NDK3, and NDK4 (Escherichia, Klebsiella, Enterobacter, and Serratia) mostly observed in domestic wastewater; against which KNP1, KNP2, KNP3, and KNP4 phages were isolated...
January 12, 2018: Archives of Microbiology
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