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Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease

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https://www.readbyqxmd.com/read/29336679/arcobacter-butzleri-ciprofloxacin-resistance-point-mutations-in-dna-gyrase-a-and-role-on-fitness-cost
#1
Susana Ferreira, Daniela R Correia, Mónica Oleastro, Fernanda C Domingues
Arcobacter butzleri is a widely distributed emerging pathogen resistant to various classes of antimicrobial agents, namely fluoroquinolones. A. butzleri resistance to fluoroquinolones is conferred by point mutations at the antibiotic target. The aim of this study was to evaluate mutations at gyrA associated with ciprofloxacin resistance and evaluate whether acquisition of resistance impacts on fitness and stress tolerance of A. butzleri. A. butzleri ciprofloxacin mutants were generated by laboratory induction...
January 16, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29336677/molecular-screening-versus-phenotypic-susceptibility-testing-of-multidrug-resistant-mycobacterium-tuberculosis-isolates-for-streptomycin-and-ethambutol
#2
Noura M Al-Mutairi, Suhail Ahmad, Eiman Mokaddas
Proper management of multidrug-resistant tuberculosis (MDR-TB) requires accurate drug susceptibility testing (DST) of Mycobacterium tuberculosis isolates to other (ethambutol [EMB], pyrazinamide, and streptomycin [SM]) first-line drugs. This study compared the performance of Mycobacterium Growth Indicator Tube (MGIT) 960 system for DST of MDR-TB isolates with polymerase chain reaction (PCR) sequencing of embB, rpsL, and rrs genes for detecting resistance to EMB and SM. MDR-TB strains (n = 60) and 25 pansusceptible M...
January 16, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29304312/high-prevalence-and-temporal-variation-of-extended-spectrum-%C3%AE-lactamase-producing-bacteria-in-urban-swedish-mallards
#3
Jon Hessman, Clara Atterby, Björn Olsen, Josef D Järhult
Antibiotic resistant bacteria present a growing global healthcare challenge. Previous research demonstrates that wild birds harbor extended spectrum β-lactamase (ESBL)-producing Enterobacteriaceae and may contribute to their dissemination. We aimed to assess prevalence and temporal variation in the detection rate of ESBL-producing bacteria in urban wild birds and to evaluate methods regarding sample handling. Monthly fecal sampling was performed in 2013 at an urban pond in Sweden. ESBL-producing Escherichia coli and Klebsiella pneumoniae were analyzed by polymerase chain reaction targeting blaCTX-M...
January 5, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29298123/molecular-characterization-of-pseudomonas-putida-group-isolates-carrying-blavim-2-disseminated-in-a-university-hospital-in-korea
#4
Jun Sung Hong, Eun-Jeong Yoon, Wonkeun Song, Yu Bin Seo, Saeam Shin, Min-Jeong Park, Seok Hoon Jeong, Kyungwon Lee
Pseudomonas putida group are Gram-negative bacilli with polar flagellation, which are ubiquitous in the environment, although they are rarely involved in human infections. The aim of this study was to identify the dissemination of VIM-2-producing P. putida group in clinical isolates from a hospital in Korea. Thirteen strains were collected from 2014 to 2015 for the study. The isolates were recovered from urine cultures of both inpatients and outpatients at the hospital. Minimum inhibitory concentrations of antibiotics were determined by Etest...
January 3, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29298110/high-prevalence-of-ctx-m-1-like-enzymes-in-urinary-isolates-of-escherichia-coli-in-guayaquil-ecuador
#5
Claudia Soria Segarra, Edison Soria Baquero, Monica Cartelle Gestal
Escherichia coli is one of the major causes of urinary tract infections in primary healthcare, and treatment is more complicated due to the increase in antibiotic resistance. Extended-spectrum β-lactamases are the most common mechanism of resistance against third-generation cephalosporin, and CTX-M-like are among the most prevalent. The aim of our work is to investigate the prevalence of blaCTX-M in isolates of E. coli obtained from samples of patients without previous known contact with the hospital. Ninety-four E...
January 3, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29298107/longitudinal-case-series-of-staphylococcus-aureus-colonization-and-infection-in-two-cohorts-of-rural-iowans
#6
Tara C Smith, Emily J Hellwig, Shylo E Wardyn, Ashley E Kates, Dipendra Thapaliya
OBJECTIVE: Examine the relationship between colonization with Staphylococcus aureus in the community and symptomatic infection in two cohorts of Iowans. DESIGN: Case series within cohort study. PARTICIPANTS: Rural Iowans selected from the Keokuk Rural Health Study, the Agricultural Health Study, and the Iowa Voter Registry. METHODS: Longitudinal study within established cohorts evaluating documented S. aureus infections with samples available for molecular typing...
January 3, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29293397/heterogeneity-of-multidrug-resistant-salmonella-enterica-isolates-with-increasing-frequency-of-resistance-to-ciprofloxacin-during-a-4-year-period-in-iran
#7
Bita Bakhshi, Arezoo Dehghan-Mouriaabadi, Parisa Kiani
BACKGROUND: The study was conducted to assess the trend of antimicrobial resistance among Salmonella enterica strains during a period of 4 years and to compare the effectiveness of three genotyping methods, including flagellin polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP), enterobacterial repetitive intergenic consensus (ERIC)-PCR, and pulsed-field gel electrophoresis (PFGE), and to determine the most efficient method for S. enterica genotyping. METHODS AND RESULTS: About 50 S...
January 2, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29293395/molecular-characterization-of-penicillinase-producing-neisseria-gonorrhoeae-isolated-in-two-time-periods-2003-2004-and-2014-2015-in-italy
#8
Paola Stefanelli, Anna Carannante, Carmen Luciana Bonanno, Marco Cusini, Valeria Ghisetti, Antonella Mencacci, Anna Maria Barbui, Grazia Prignano, Caterina Vocale, Paola Vacca
The emergence of antibiotic resistant strains poses a great concern for gonorrhea treatment. The aim of this study was to characterize penicillinase-producing Neisseria gonorrhoeae (PPNG) isolates collected in Italy in two time frames, 2003-2004 and 2014-2015. A total of 80 PPNG were characterized for the blaTEM gene variant and the plasmid type. Furthermore, gonococci were typed using Neisseria gonorrhoeae multiantigen sequence typing. Antibiotic susceptibility assay was performed for penicillin, ciprofloxacin, ceftriaxone, and spectinomycin by Etest and minimum inhibitory concentration (MIC) test strip methods...
January 2, 2018: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29271698/macrolide-resistance-selection-in-tibetan-pigs-with-a-high-load-of-mycoplasma-hyopneumoniae
#9
Gang Qiu, Yapei Rui, Jialu Zhang, Lihong Zhang, Shucheng Huang, Qingxia Wu, Kun Li, Zhaoqing Han, Suozhu Liu, Jiakui Li
Currently, tylosin tartrate is the first-line treatment for Mycoplasma hyopneumoniae infections in China. However, the efficacy of tylosin tartrate and resistance to this treatment in M. hyopneumoniae infections of Tibetan pigs are unknown. In this study, we examined the prevalence of M. hyopneumoniae infection in Tibetan pigs at three intensive farms in Tibet, China. In addition, we investigated the efficacy of tylosin tartrate treatment for porcine enzootic pneumonia by monitoring M. hyopneumoniae DNA eradication dynamics and macrolide resistance (MR)...
December 22, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29267137/characterization-of-isolates-associated-with-emergence-of-oxa-48-producing-klebsiella-pneumoniae-in-croatia
#10
Marko Jelić, Jasenka Škrlin, Danijela Bejuk, Iva Košćak, Iva Butić, Marija Gužvinec, Arjana Tambić-Andrašević
Here, we report a retrospective study conducted to elucidate emergence, epidemiology, and molecular mechanisms of resistance underlying the early spread of OXA-48 carbapenemase-producing Enterobacteriaceae in Croatia. Retrospective screening for OXA-48 producers was performed on a collection of 296 nonrepetitive, carbapenem-nonsusceptible enterobacterial isolates collected from January 2011 to December 2012 from 40 participating centers in Croatia. Antimicrobial susceptibility profiles and production of carbapenemases were assessed phenotypically...
December 21, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29267134/candida-tropicalis-isolates-from-mexican-republic-exhibit-high-susceptibility-to-bleomycin-and-variable-susceptibility-to-hydrogen-peroxide
#11
Natalia Gómez-Casanova, Alberto Bellido, Alejandra Espinosa-Texis, Rosario Cueva, Toni Ciudad, Germán Larriba
Candida sp. are found as part of the commensal flora in humans but can cause invasive candidiasis in patients with severe underlying disease, especially cancer patients. These patients are frequently subjected to nonsurgical anticancer treatments such as ionizing radiation and anticancer drugs, which kill proliferating human cells by damaging DNA but also affect the microbiota of the patient. C. tropicalis, an emerging fungal pathogen, is associated with high mortality rates of cancer patients especially in tropical regions...
December 21, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29265963/hospital-outbreak-of-a-colistin-resistant-ndm-1-and-oxa-48-producing-klebsiella-pneumoniae-high-mortality-from-pandrug-resistance
#12
Huseyin Guducuoglu, Nafia Canan Gursoy, Yusuf Yakupogullari, Mehmet Parlak, Gokhan Karasin, Mahmut Sunnetcioglu, Baris Otlu
Colistin resistance causes substantial problems in the treatment of serious infections with carbapenem-resistant (CR) gram-negative bacteria. In this study, we report a fatal hospital outbreak from the spread of a pandrug-resistant Klebsiella pneumoniae clone. An outbreak investigation was conducted after consecutive isolation of nine CR-K. pneumoniae (CR-Kp) strains from eight patients in two intensive care units of a university hospital within 2 weeks. Carbapenem and colistin resistance genes were investigated with PCR, clonal relationships of isolates were studied with pulse-field gel electrophoresis, and multilocus sequence types were determined...
December 21, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29261405/evaluation-of-aminoglycoside-and-carbapenem-resistance-in-a-collection-of-drug-resistant-pseudomonas-aeruginosa-clinical-isolates
#13
Selina Y L Holbrook, Sylvie Garneau-Tsodikova
Pseudomonas aeruginosa, a Gram-negative bacterium, is a member of the ESKAPE pathogens and one of the leading causes of healthcare-associated infections worldwide. Aminoglycosides (AGs) are recognized for their efficacy against P. aeruginosa. The most common resistance mechanism against AGs is the acquisition of AG-modifying enzymes (AMEs) by the bacteria, including AG N-acetyltransferases (AACs), AG O-phosphotransferases (APHs), and AG O-nucleotidyltransferases (ANTs). In this study, we obtained 122 multidrug-resistant P...
December 20, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29236574/genetic-diversity-of-kpc-producing-escherichia-coli-klebsiella-oxytoca-serratia-marcescens-and-citrobacter-freundii-isolates-from-argentina
#14
Denise De Belder, Celeste Lucero, Melina Rapoport, Adriana Rosato, Diego Faccone, Alejandro Petroni, Fernando Pasteran, Ezequiel Albornoz, Alejandra Corso, Sonia A Gomez
The predominance of Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae was caused by the spread of ST258 clone. In Latin America, KPC was reported in 2006, with the isolation of genetically unrelated K. pneumoniae in Colombia. Since then, the expansion of blaKPC in either K. pneumoniae ST258 or other Enterobacteriaceae (ETB) species was increasingly reported. In this study, we characterized 89 KPC-producing Escherichia coli, Klebsiella oxytoca, Serratia marcescens, and Citrobacter freundii that were received between 2010 and 2014...
December 13, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29232167/tigecycline-susceptibility-of-klebsiella-pneumoniae-complex-and-escherichia-coli-isolates-from-companion-animals-the-prevalence-of-tigecycline-nonsusceptible-k-pneumoniae-complex-including-internationally-expanding-human-pathogenic-lineages
#15
Toyotaka Sato, Kazuki Harada, Masaru Usui, Yuzo Tsuyuki, Tsukasa Shiraishi, Yutaka Tamura, Shin-Ichi Yokota
Transmission of tigecycline-nonsusceptible pathogenic Enterobacteriaceae from companion animals to human should be a concern because tigecycline is a last-line drug for treating multidrug-resistant Enterobacteriaceae in human medicine. However, tigecycline susceptibility of Enterobacteriaceae isolated from companion animals has not been investigated. In this study, we investigated the tigecycline susceptibility of Klebsiella pneumoniae complex and Escherichia coli isolates from dogs and cats, and evaluated their human pathogenicity potential...
December 12, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227744/molecular-epidemiology-of-klebsiella-pneumoniae-strains-causing-bloodstream-infections-in-adults
#16
Meritxell Cubero, Imma Grau, Fe Tubau, Román Pallarés, M Ángeles Domínguez, Josefina Liñares, Carmen Ardanuy
Molecular epidemiology of Klebsiella pneumoniae bacteremic strains allows for a better understanding of preventive and therapeutic strategies. Clinical and microbiological characteristics of 348 K. pneumoniae bacteremia cases (2007-2009) were retrospectively characterized by multilocus sequence typing and extended-spectrum beta-lactamases (ESBL) production. Overall, 223 (64.08%) cases were nosocomial (NA), 58 (16.67%) healthcare associated, and 67 (19.25%) community acquired. The main infection origins were urinary tract (16...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227741/new-subclass-b1-metallo-%C3%AE-lactamase-gene-from-a-clinical-pathogenic-myroides-odoratus-strain
#17
Su Xu, Yijian Chen, Zhuyingjie Fu, Ying Li, Guixiu Shi, Xiaogang Xu, Yang Liu, Minggui Wang
Myroides odoratus is a low-virulence opportunistic human pathogen. Infections caused by M. odoratus are not common, but reports are increasing in recent years. The biggest challenge for treatment is its resistance to most antibiotics. In 2015, we isolated a pathogenic multidrug-resistant strain of M. odoratus from a urinary tract infection (UTI) patient's urine sample. To report the experience in managing M. odoratus-related UTI and investigate the genetic mechanism of this carbapenem-resistant strain, we conducted a series of microbiological and molecular studies...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227738/antibiotic-resistance-of-helicobacter-pylori-in-iranian-children-a-systematic-review-and-meta-analysis
#18
Arshid Yousefi-Avarvand, Hamid Vaez, Mohsen Tafaghodi, Amir Hossein Sahebkar, Mohsen Arzanlou, Farzad Khademi
Antibiotic therapy for children infected with Helicobacter pylori is important. However, resistance to antibiotics is one of the main causes of treatment failure. This study was designed to evaluate the prevalence pattern of antibiotic resistance of H. pylori in Iranian children using a systematic review and meta-analysis of literature. A computerized search (until June 10, 2017) using related keywords in the national and international databases was performed. A total of 261 original articles on antibiotic resistance of H...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227188/clinical-strains-of-chryseobacterium-and-elizabethkingia-spp-isolated-from-pediatric-patients-in-a-university-hospital-performance-of-maldi-tof-ms-based-identification-antimicrobial-susceptibilities-and-baseline-patient-characteristics
#19
Hasan Cenk Mirza, Özlem Tuncer, Serpil Ölmez, Burçin Şener, Gökçen Dilşa Tuğcu, Uğur Özçelik, Nafia Canan Gürsoy, Barış Otlu, Ayşe Büyükçam, Ateş Kara, Banu Sancak
Our objective was to evaluate the performance of matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) for identification of the Chryseobacterium and Elizabethkingia spp. isolated from pediatric patients at Hacettepe University Hospital using 16S rRNA gene sequencing as the gold standard and to determine the antimicrobial susceptibility patterns of the isolates and baseline characteristics of patients. All stored Chryseobacterium and Elizabethkingia spp. isolated from various clinical specimens (sputum, blood, and urine) of pediatric patients at Hacettepe University Hospital between 2012 and 2016 were included in this study...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/29227186/diversity-of-ctx-m-extended-spectrum-%C3%AE-lactamases-in-escherichia-coli-isolates-from-retail-raw-ground-beef-first-report-of-ctx-m-24-and-ctx-m-32-in-algeria
#20
Nesrine Rebbah, Yamina Messai, Pierre Châtre, Marisa Haenni, Jean Yves Madec, Rabah Bakour
The aim of this study was to investigate the prevalence and molecular features of extended-spectrum cephalosporin resistance in Escherichia coli isolates contaminating ground beef at retail in Algeria. Of 371 ground beef samples, 27.5% were found to contain cefotaxime-resistant E. coli isolates distributed into A (24.5%), B1 (60.8%), and D (14.7%) phylogroups. A rate of 88.2% of isolates had a multidrug-resistance phenotype. All strains were producers of CTX-M type extended-spectrum β-lactamases (ESBLs): CTX-M-1, CTX-M-3, CTX-M-14, CTX-M-15, CTX-M-24, or CTX-M-32...
December 11, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
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