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https://www.readbyqxmd.com/read/28941388/high-frequency-of-s-aureus-mssa-mrsa-in-children-under-1-year-old-with-skin-and-soft-tissue-infections
#1
Lorena Salazar, Judy Natalia Jimenez Quiceno
OBJECTIVE: Staphylococcus aureus is responsible for a large number of infections in pediatric population; however, information about the behavior of such infections in this population is limited. The aim of the study was to describe the clinical, epidemiological, and molecular characteristics of infections caused by methicillin-susceptible and resistant S. aureus (MSSA-MRSA) in a pediatric population. METHOD: A cross-sectional descriptive study in patients from birth to 14 years of age from three high-complexity institutions was conducted (2008-2010)...
September 20, 2017: Jornal de Pediatria
https://www.readbyqxmd.com/read/28938539/dissemination-of-macrolides-fusidic-acid-and-mupirocin-resistance-among-staphylococcus-aureus-clinical-isolates
#2
Xingmei Liu, Shanshan Deng, Jinwei Huang, Yaling Huang, Yu Zhang, Qin Yan, Yanhong Wang, Yanyue Li, Chengfu Sun, Xu Jia
As an increasingly common cause of skin infections worldwide, the prevalence of antibiotic-resistant Staphylococcus aureus (S. aureus) across China has not been well documented. This literature aims to study the resistance profile to commonly used antibiotics, including macrolides, fusidic acid (FA) and mupirocin, and its relationship to the genetic typing in 34 S. aureus strains, including 6 methicillin-resistant S. aureus (MRSA), isolated from a Chinese hospital. The MIC results showed 27 (79.4%), 1 (2.9%) and 6 (17...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28934313/characterization-of-pathogenic-enterococcus-cecorum-from-different-poultry-groups-broiler-chickens-layers-turkeys-and-waterfowl
#3
Beata Dolka, Dorota Chrobak-Chmiel, Michał Czopowicz, Piotr Szeleszczuk
Enterococcus cecorum (EC) is known as a commensal in the intestines of mammals and birds. However, it has been described as an emerging pathogen in poultry industry worldwide. The aim of this study was to analyze and compare EC isolated from clinical material collected from poultry groups with different production purposes. The genetic diversity among pathogenic EC in relation to each specific poultry type was examined. In total, 148 isolates from independent infection outbreaks (2011-2016) were used: 76 broiler chickens (CB), 37 broiler breeders (BB), 23 layers (CL), 7 waterfowl (W) and 5 turkey (T) flocks (1 isolate/1 flock)...
2017: PloS One
https://www.readbyqxmd.com/read/28929959/-in-vitro-effect-of-vancomycin-and-daptomycin-on-biofilm-formation-of-coagulase-negative-staphylococci-strains
#4
Duygu Nilüfer Öcal, İştar Dolapçı, Zeynep Gençtürk, Alper Tekeli
Coagulase-negative staphylococci (CNS) are one of the primer agents of blood stream infections (BSI) and catheter-related bloodstream infections (CR-BSI) which are associated mostly with the usage of central venous catheters and, important causes of morbidity and mortality despite the usage of antibacterial and supportive treatment. It is important to determine the properties of these causative microorganisms in order to make appropriate treatment of such infections. The aims of our study were to evaluate the biofilm formation of coagulase negative staphylococci (CNS) which were causative agents of bloodstream (BSI) and catheter related bloodstream infections (CR-BSI), to determine the minimum inhibitory concentration (MIC) of planktonic forms and minimal biofilm eradication concentration (MBEC) of sessile forms for vancomycin and daptomycin and to evaluate the efficacy of these antibiotics in infections with biofilm-forming isolates in vitro...
July 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28926634/nasal-and-pharyngeal-carriage-of-methicillin-resistant-staphylococcus-sciuri-among-hospitalised-patients-and-healthcare-workers-in-a-serbian-university-hospital
#5
Ivana Cirkovic, Jasmina Trajkovic, Tomasz Hauschild, Paal Skytt Andersen, Adebayo Shittu, Anders Rhod Larsen
There has been a paucity of data on methicillin-resistant Staphylococcus sciuri (MRSS) epidemiology in European healthcare settings. The aim of the study was to determine the prevalence of nasal and pharyngeal carriage and diversity of MRSS among inpatients and healthcare workers (HCWs) in the largest healthcare centre in Serbia, and to assess performance of different methods for MRSS screening. Nasal and pharyngeal swabs were obtained from 195 patients and 105 HCWs in different departments. Each swab was inoculated directly onto MRSA-ID, oxacillin-resistance screening agar and mannitol salt agar (MSA) with 2 mg/L of oxacillin...
2017: PloS One
https://www.readbyqxmd.com/read/28924947/development-of-a-rapid-maldi-tof-ms-based-epidemiological-screening-method-using-mrsa-as-a-model-organism
#6
Åsa Lindgren, Nahid Karami, Roger Karlsson, Christina Åhrén, Martin Welker, Edward R B Moore, Liselott Svensson Stadler
In this study we present a method using whole cell MALDI-TOF MS and VITEK MS RUO/SARAMIS as a rapid epidemiological screening tool. MRSA was used as a model organism for setting up the screening strategy. A collection of well-characterised MRSA strains representing the 19 most common Pulsed-Field Gel Electrophoresis (PFGE)-types in the region of South-West Sweden for the past 20 years was analysed with MALDI-TOF MS. A total of 111 MRSA strains were used for creating 19 PFGE-specific Superspectra using VITEK MS RUO/SARAMIS...
September 18, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28923132/characterization-of-environmental-pseudomonas-aeruginosa-using-multilocus-sequence-typing-scheme
#7
Júlia Radó, Edit Kaszab, Tünde Petrovics, Judit Pászti, Balázs Kriszt, Sándor Szoboszlay
PURPOSE: The objectives of this study were to examine environmental (hydrocarbon degrading) Pseudomonas aeruginosa isolates with Multilocus Sequence Typing (MLST) and to determine their relevant features, such as serotype, virulence genes, biofilm forming ability and hydrocarbon degrading capacity. METHODOLOGY: The diversity of environmental isolates was assessed with an MLST scheme. Investigation of virulence determinants included serotyping, hemolytic activity test and the detection of virulence genes exoS, exoY, exoT, exoU, exoA...
September 19, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28919197/imported-poultry-meat-as-a-source-of-extended-spectrum-cephalosporin-resistant-cmy-2-producing-salmonella-heidelberg-and-s-minnesota-in-european-union-2014-2015
#8
Joana Campos, Joana Mourão, Leonor Silveira, Margarida Saraiva, Cristina Belo Correia, Ana Paula Maçãs, Luísa Peixe, Patrícia Antunes
Extended-spectrum cephalosporin (ESC)-resistant Salmonella has been described at low level in EU, nevertheless the increasing importation of poultry meat could be an important source of epidemic strains carrying ESC-resistant genes. We evaluated ESC resistance and characterized genetic platforms as well as the clonal relatedness of Salmonella isolates from poultry meat products imported into Portugal. All Salmonella isolates recovered from samples of fresh meat destined to be imported into the EU in the scope of Portuguese official border control between 2014 and 2015 were studied...
September 14, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28915068/prevalence-and-transmission-of-antimicrobial-resistance-in-a-vertically-integrated-veal-calf-production-system
#9
Holden Hutchinson, Sarah Finney, Lohendy Muñoz-Vargas, Sydnee Feicht, Margaret Masterson, Gregory Habing
Transmission of antimicrobial resistance (AMR) from animal production systems to humans through the food supply is a public health concern. Currently, little is known about the prevalence of AMR among veal calves in the United States. Therefore, the objective of this prospective cohort study was to estimate the prevalence of AMR and multidrug resistance (MDR) among Escherichia coli within a vertically integrated production system. In addition, this study aimed to identify genes associated with phenotypic resistance to third- and fourth-generation cephalosporins (3GC and 4GC)...
September 15, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28911852/molecular-epidemiology-and-the-resistance-and-virulence-properties-of-pseudomonas-aeruginosa-cross-colonization-clonal-isolates-in-the-non-outbreak-setting
#10
Pengwei Hu, Jiayi Chen, Yuhang Chen, Tao Zhou, Xin Xu, Xiaofang Pei
The molecular epidemiology of Pseudomonas aeruginosa cross-colonization isolates has received limited attention in the non-outbreak setting. Also the roles of P. aeruginosa resistance and virulence in cross-colonization need to be further studied. This study aims to launch a tracking investigation to determine the epidemiological relationship of P. aeruginosa clinical and environmental isolates, identify the cross-colonization routes, and characterize the resistance and virulence properties of clonal clusters and sporadic strains in the respiratory care wards of a tertiary care hospital...
September 11, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28910140/impact-of-clinical-salmonellosis-in-veal-calves-on-the-recovery-of-salmonella-in-lymph-nodes-at-harvest
#11
Lohendy Muñoz-Vargas, Sarah K Finney, Holden Hutchinson, Margaret A Masterson, Greg Habing
The objective of this study was to determine the prevalence, serotypes, antimicrobial resistance phenotypes, and pulsed-field gel electrophoresis (PFGE) patterns of Salmonella recovered in feces and mesenteric and prefemoral lymph nodes (LNs) from cohorts of calves with and without a confirmed outbreak of salmonellosis. In a prospective cohort study, 160 calves from four farms without a reported outbreak (nonoutbreak farms) were sampled at farm and harvest. In addition, harvest samples from 80 calves of two farms with a confirmed outbreak (outbreak farms) were collected...
September 14, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28893788/genomic-and-molecular-characterization-of-clinical-isolates-of-enterobacteriaceae-harboring-mcr-1-in-colombia-2002-2016
#12
Sandra Yamile Saavedra, Lorena Diaz, Magdalena Wiesner, Adriana Correa, Stefany Alejandra Arévalo, Jinnethe Reyes, Andrea Melissa Hidalgo, Elsa de la Cadena, Marcela Perenguez, Lucy Angeline Montaño, Javier Ardila, Rafael Ríos, María Victoria Ovalle, Paula Díaz, Paola Porras, Maria V Villegas, Cesar A Arias, Mauricio Beltrán, Carolina Duarte
Polymyxins are last resort antimicrobial agents used to treat infections caused by carbapenem-resistant Enterobacteriaceae Due to the worldwide dissemination of polymyxin resistance in animal and human isolates, we aimed to characterize polymyxin resistance associated with the presence of mcr-1 in Enterobacteriaceae and nonfermenter Gram-negative bacilli, in isolates collected retrospectively in Colombia from 2002 to 2016. A total of 5,887 Gram-negative clinical isolates were studied and 513 were found to be resistant to the polymyxins...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28890516/molecular-characterization-of-non-carbapenemase-producing-escherichia-coli-clinical-isolates-with-reduced-carbapenem-susceptibility-from-a-thai-university-hospital
#13
Sawitree Nuramrum, Aroonwadee Chanawong, Kamonwan Lunha, Aroonlug Lulitanond, Arunnee Sangka, Chotechana Wilailuckana, Sunpetch Angkititrakul, Nicha Charoensri, Lumyai Wonglakorn, Prajuab Chaimanee, Ploenchan Chetchotisakd
Twelve non-replicate carbapenemase-negative ertapenem-non-susceptible (CNENS) Escherichia coli isolates from a Thai university hospital between 2010 and 2014 were characterized and compared with two carbapenemase-producing E. coli isolates from the same hospital. Eight unique PFGE patterns were obtained. All produced CTX-M-15 β-lactamase and two isolates co-expressed either CMY-2 cephalosporinase or increased efflux pump. Amino acid sequence analysis revealed that OmpF defect (seven isolates) due to mutations generating premature proteins or an IS1 insertion was more prevalent than in OmpC (no truncated proteins found)...
September 11, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28888545/next-generation-sequencing-for-the-investigation-of-an-outbreak-of-salmonella-schwarzengrund-in-nanjing-china
#14
Xuefei Du, Xiao Jiang, Yanhua Ye, Baofu Guo, Wei Wang, Jie Ding, Guoxiang Xie
INTRODUCTION: Salmonella Schwarzengrund is most frequently isolated from poultry meat and can cause human infections. S. Schwarzengrund was isolated from diarrheal patients in a food poisoning event in Nanjing, China. METHODS: Three strains isolated from patients were microbiologically confirmed as S. Schwarzengrund. Salmonella strains from spiced donkey meat were also confirmed as S. Schwarzengrund. Epidemiology investigation showed evidence of a correlation between the consumption of spiced donkey meat and those cases...
September 6, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28887291/molecular-epidemiology-and-antimicrobial-susceptibility-of-methicillin-resistant-staphylococcus-aureus-isolates-in-xiangyang-china
#15
Yi-Tong Tang, Rui Cao, Na Xiao, Zhi-Shan Li, Rong Wang, Jiu-Ming Zou, Jiao Pei
OBJECTIVES: Methicillin-resistant Staphylococcus aureus (MRSA) is a public health problem worldwide. This study aimed to investigate the antimicrobial susceptibilities and molecular epidemiological characteristics of MRSA strains in Xiangyang, China, during 2012-2014. METHODS: Eighty non-duplicate S. aureus isolates from clinical specimens were collected from four tertiary hospitals. MRSA strains were identified and tested for antibacterial susceptibility. Staphylococcus cassette chromosome mec (SCCmec) typing, Pulsed-field gel electrophoresis (PFGE), multi-locus sequence typing (MLST) and spa typing were performed to explore molecular characteristics...
September 5, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28882784/high-prevalence-of-diverse-vancomycin-resistance-enterococcus-faecium-isolates-in-clinical-and-environmental-sources-in-icu-wards-in-southwest-of-iran
#16
Maniya Arshadi, Masoumeh Douraghi, Leili Shokoohizadeh, Seyed Mojtaba Moosavian, Mohammad Reza Pourmand
This study aimed at determining the prevalence, antibiotic resistance patterns, and genetic linkage of Vancomycin Resistant Enterococcus faecium (VREfm) from different sources in the southwest of Iran. A total of 51 VREfm isolates were obtained and subjected to antibiotic susceptibility testing, carriage of virulence genes, and pulsed-field gel electrophoresis (PFGE) method. All the VRE isolates exhibited a high level of resistance to teicoplanin, ampicillin, erythromycin, ciprofloxacin, and gentamicin, also carried the vanA gene...
September 4, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28878891/epidemic-characterization-and-molecular-genotyping-of-shigella-flexneri-isolated-from-calves-with-diarrhea-in-northwest-china
#17
Zhen Zhu, Mingze Cao, Xuzheng Zhou, Bing Li, Jiyu Zhang
BACKGROUND: The widespread presence of antibiotics resistance genes in pathogenic bacteria can cause enormous problems. Food animals are one of the main reservoirs of intestinal pathogens that pose a potential risk to human. Analyzing the epidemiological characteristics and resistance patterns of Shigella flexneri in calves is necessary for animal and human health. METHODS AND RESULTS: A total of 54 Shigella flexneri isolates, including six serotypes (1a, 2a, 2b, 4a, 6 and Xv), were collected from 837 fecal samples obtained from 2014 to 2016...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28876169/ndm-1-hazard-in-the-balkan-states-evidence-of-the-first-outbreak-of-ndm-1-producing-klebsiella-pneumoniae-in-bulgaria
#18
Encho Savov, Lida Politi, Nicholas Spanakis, Angelina Trifonova, Elena Kioseva, Athanasios Tsakris
New Delhi MBL (NDM) carbapenemase-producing Klebsiella pneumoniae has become one of the most concerning multidrug-resistant pathogens. The Balkan counties are considered a reservoir for the spread of such strains based on several reports documenting NDM infections after hospitalization in this region. Nevertheless, NDM-producing K. pneumoniae have been only occasionally documented from Balkans. The current study documents the first polyclonal outbreak caused by NDM-1-producing K. pneumoniae in Bulgaria. From July 2015 to April 2016, all 25 single-patient carbapenem-nonsusceptible K...
September 6, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28874376/genomics-and-susceptibility-profiles-of-extensively-drug-resistant-xdr-pseudomonas-aeruginosa-from-spain
#19
Ester Del Barrio-Tofiño, Carla López-Causapé, Gabriel Cabot, Alba Rivera, Natividad Benito, Concepción Segura, María Milagro Montero, Luisa Sorlí, Fe Tubau, Silvia Gómez-Zorrilla, Nuria Tormo, Raquel Durá-Navarro, Esther Viedma, Elena Resino-Foz, Marta Fernández-Martínez, Claudia González-Rico, Izaskun Alejo-Cancho, Jose Antonio Martínez, Cristina Labayru-Echverria, Carlos Dueñas, Ignacio Ayestarán, Laura Zamorano, Luis Martinez-Martinez, Juan Pablo Horcajada, Antonio Oliver
This study assessed the molecular epidemiology, resistance mechanisms and susceptibility profiles of a collection of 150 XDR P. aeruginosa clinical isolates obtained from a 2015 Spanish multicenter study, with a particular focus on resistome analysis in relation to ceftolozane/tazobactam susceptibility. Broth microdilution MICs revealed that nearly all (>95%) of the isolates were nonsusceptible to piperacillin/tazobactam, ceftazidime, cefepime, aztreonam, imipenem, meropenem and ciprofloxacin. Most of them were also resistant to tobramycin (77%), whereas nonsusceptibility rates were lower for ceftolozane/tazobactam (31%), amikacin (7%) and colistin (2%)...
September 5, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28870269/failure-to-communicate-transmission-of-extensively-drug-resistant-bla-oxa-237-containing-acinetobacter-baumannii-multiple-facilities-in-oregon-2012-2014
#20
Genevieve L Buser, P Maureen Cassidy, Margaret C Cunningham, Susan Rudin, Andrea M Hujer, Robert Vega, Jon P Furuno, Steven H Marshall, Paul G Higgins, Michael R Jacobs, Meredith S Wright, Mark D Adams, Robert A Bonomo, Christopher D Pfeiffer, Zintars G Beldavs
OBJECTIVE To determine the scope, source, and mode of transmission of a multifacility outbreak of extensively drug-resistant (XDR) Acinetobacter baumannii. DESIGN Outbreak investigation. SETTING AND PARTICIPANTS Residents and patients in skilled nursing facilities, long-term acute-care hospital, and acute-care hospitals. METHODS A case was defined as the incident isolate from clinical or surveillance cultures of XDR Acinetobacter baumannii resistant to imipenem or meropenem and nonsusceptible to all but 1 or 2 antibiotic classes in a patient in an Oregon healthcare facility during January 2012-December 2014...
September 5, 2017: Infection Control and Hospital Epidemiology
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