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https://www.readbyqxmd.com/read/28439603/emergence-of-stenotrophomonas-maltophilia-nosocomial-isolates-in-a-saudi-children-s-hospital-risk-factors-and-clinical-characteristics
#1
Jobran M Alqahtani
  To describe the clinical characteristics of pediatric patients colonized or infected by Stenotrophomonas maltophilia (S. maltophilia) at a Saudi children's hospital, to identify risk factors associated with infection, and to investigate the antimicrobial resistance patterns of this emerging pathogen.  Methods: In this cross-sectional observational study, 64 non-duplicating S. maltophilia strains were isolated  in Najran Maternity and Children's Hospital, Najran,  Saudi Arabia between January 2015 to February 2016...
May 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28437233/in-vitro-activity-of-various-antibiotics-in-combination-with-tigecycline-against-acinetobacter-baumannii-a-systematic-review-and-meta-analysis
#2
Jian Li, Xianghai Yang, Lidan Chen, Xinran Duan, Zhihui Jiang
Given that tigecycline-based combination therapy is recognized as a valuable option for the treatment of tigecycline-resistant Acinetobacter baumannii, we conducted this systematic review and meta-analysis to assess the overall evidence of its effectiveness. The synergy rate was defined as the primary outcome that was calculated separately for time-kill, Etest, and checkerboard microdilution methods. The secondary outcomes were bactericidal activity and the efficacy of combination treatment on the development of resistance...
April 24, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28427842/predominance-of-international-clone-2-oxa-23-producing-acinetobacter-baumannii-clinical-isolates-in-greece-2015-results-of-a-nationwide-study
#3
Spyros Pournaras, Konstantina Dafopoulou, Mariateresa Del Franco, Olympia Zarkotou, Evangelia Dimitroulia, Efi Protonotariou, Aggeliki Poulou, Raffaele Zarrilli, Athanasios Tsakris
In a previous nationwide study in Greece, OXA-58 was the sole carbapenemase present among carbapenem-resistant Acinetobacter baumannii (CRAB) isolated between 2000 and 2009. In this study, the antibiotic resistances, carbapenemase gene content and clonal relatedness of 194 single-patient CRAB clinical isolates collected randomly during 2015 from 11 tertiary hospitals located throughout Greece were investigated. Antimicrobial susceptibility was determined using commercial and dilution methods. PCR for carbapenemase genes were performed...
April 18, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28422304/antibiotic-treatment-of-zebrafish-mycobacteriosis-tolerance-and-efficacy-of-treatments-with-tigecycline-and-clarithromycin
#4
C T Chang, K M Doerr, C M Whipps
Zebrafish (Danio rerio) are a popular model organism used in a growing number of research fields. Maintaining healthy, disease-free laboratory fish is important for the integrity of many of these studies. Mycobacteriosis is a chronic bacterial infection caused by several Mycobacterium spp. and is the second most common disease found in laboratory zebrafish. Current mycobacteriosis control measures recommend the removal of infected fish and in severe outbreaks, depopulation. These measures can be effective, but less disruptive measures should be assessed for controlling mycobacteriosis, particularly when valuable and rare lines of fish are affected...
April 19, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28416558/in-vitro-discordance-with-in-vivo-activity-humanized-exposures-of-ceftazidime-avibactam-aztreonam-and-tigecycline-alone-and-in-combination-against-new-delhi-metallo-%C3%AE-lactamase-producing-klebsiella-pneumoniae-in-a-murine-lung-infection-model
#5
M L Monogue, L M Abbo, R Rosa, J F Camargo, O Martinez, R A Bonomo, D P Nicolau
The management of infections with New Delhi Metallo-beta-lactamase-1 (NDM) producing bacteria remains clinically challenging given the multi-drug resistant (MDR) phenotype associated with these bacteria. Despite resistance in vitro, ceftazidime-avibactam previously demonstrated in vivo activity against NDM+ Enterobacteriaceae. Herein, we observed in vitro synergy with ceftazidime-avibactam and aztreonam against a MDR K. pneumoniae harboring NDM. In vivo, humanized doses of ceftazidime-avibactam monotherapy resulted in > 2 log10CFU bacterial reduction, therefore, no in vivo synergy was observed...
April 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28396656/prescription-patterns-for-tigecycline-in-severely-ill-patients-for-non-fda-approved-indications-in-a-developing-country-a-compromised-outcome
#6
Rima A Moghnieh, Dania I Abdallah, Ismail A Fawaz, Tarek Hamandi, Mohammad Kassem, Nabila El-Rajab, Tamima Jisr, Anas Mugharbil, Nabila Droubi, Samaa Al Tabah, Loubna Sinno, Fouad Ziade, Ziad Daoud, Ahmad Ibrahim
Introduction: With the rise in antibiotic resistance, tigecycline has been used frequently in off-label indications, based on its in-vitro activity against multidrug-resistant organisms. In this study, our aim was to assess its use in approved and unapproved indications. Materials and Methods: This is a retrospective chart review evaluating a 2-year experience of tigecycline use for > 72 h in 153 adult patients inside and outside critical care unit from January 2012 to December 2013 in a Lebanese tertiary-care hospital...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28396550/klebsiella-pneumoniae-st11-and-st147-highly-resistant-to-tigecycline-from-companion-animals
#7
Cristina M Ovejero, Jose Antonio Escudero, Daniel Thomas-Lopez, Andreas Hoefer, Gabriel Moyano, Natalia Montero, Carmen Martin Espada, Bruno Gonzalez-Zorn
In this study we have characterized two tigecycline resistant Klebsiella pneumoniae clones isolated from dog urine samples. The isolates were genetically unrelated, belonging to sequence types ST11 and ST147, both classically related to human isolates. To the best of our knowledge, this is the first identification of tigecycline resistant isolates from animals. We unveil the worrisome circulation among animals of bacterial clones resistant to this last resort antibiotic.
April 10, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28395551/use-of-tigecycline-in-pediatric-clinical-practice
#8
Maria Vincenza Mastrolia, Luisa Galli, Maurizio de Martino, Elena Chiappini
INTRODUCTION: Tigecycline, a derivative of minocycline, is an extended-spectrum antimicrobial agent. It has a restricted approval field in children and the experience of its adoption in clinical practice is reserved for cases of challenging infections. The aim of this review was to summarize evidence regarding the use of tigecycline in infants and children, focusing on the drug's clinical efficacy data and tolerability profile. AREAS COVERED: We have conducted a literature search of the Cochrane Library, EMBASE, and MEDLINE databases, from their inception through January 5, 2017, using the following terms: tigecycline, newborn, infant, child, pediatrics, adolescent, human, clinical trial, and case report...
April 11, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28388651/tigecycline-resistance-among-carbapenem-resistant-klebsiella-pneumoniae-clinical-characteristics-and-expression-levels-of-efflux-pump-genes
#9
Sheng-Kang Chiu, Ming-Chin Chan, Li-Yueh Huang, Yi-Tsung Lin, Jung-Chung Lin, Po-Liang Lu, L Kristopher Siu, Feng-Yee Chang, Kuo-Ming Yeh
OBJECTIVES: Tigecycline is a treatment option for infections caused by carbapenem-resistant Klebsiella pneumoniae (CRKP). Emerging tigecycline resistance in CRKP represents a growing threat. Knowledge of the clinical, microbiological, and molecular characteristics of tigecycline- and carbapenem-resistant Klebsiella pneumoniae (TCRKP) is limited. METHODS: Patients infected with TCRKP were identified from a Taiwanese national surveillance study. Clinical data were collected from medical records...
2017: PloS One
https://www.readbyqxmd.com/read/28381268/the-efficacy-and-safety-of-tigecycline-for-the-treatment-of-bloodstream-infections-a-systematic-review-and-meta-analysis
#10
REVIEW
Jian Wang, Yaping Pan, Jilu Shen, Yuanhong Xu
Patients with bloodstream infections (BSI) are associated with high mortality rates. Due to tigecycline has shown excellent in vitro activity against most pathogens, tigecycline is selected as one of the candidate drugs for the treatment of multidrug-resistant organisms infections. The purpose of this study was to evaluate the effectiveness and safety of the use of tigecycline for the treatment of patients with BSI. The PubMed and Embase databases were systematically searched, to identify published studies, and we searched clinical trial registries to identify completed unpublished studies, the results of which were obtained through the manufacturer...
April 5, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28369471/activity-of-cefiderocol-s-649266-against-carbapenem-resistant-gram-negative-bacteria-collected-from-inpatients-in-greek-hospitals
#11
Matthew E Falagas, Tilemachos Skalidis, Konstantinos Z Vardakas, Nicholas J Legakis
Background: Cefiderocol (S-649266), a siderophore cephalosporin, utilizes a novel mechanism of entry into the periplasmic space of Gram-negative bacteria and is broadly stable to ESBLs and carbapenemases. Methods: A collection of carbapenem-resistant Gram-negative bacteria isolated from clinical specimens in 18 Greek hospitals was tested for susceptibility to cefiderocol, meropenem, ceftazidime, cefepime, ceftazidime/avibactam, ceftolozane/tazobactam, aztreonam, amikacin, ciprofloxacin, colistin and tigecycline...
March 22, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28369424/in-vitro-evaluation-of-different-antimicrobial-combinations-against-carbapenemase-producing-klebsiella-pneumoniae-the-activity-of-the-double-carbapenem-regimen-is-related-to-meropenem-mic-value
#12
A Oliva, L Scorzolini, A Cipolla, M T Mascellino, F Cancelli, D Castaldi, A D'Abramo, C D'Agostino, G Russo, M R Ciardi, C M Mastroianni, V Vullo
Objectives and methods: We evaluated the in vitro activity of different antimicrobial combinations with and without colistin against 39 carbapenem-resistant Klebsiella pneumoniae (CR-Kp) strains (colistin + meropenem/doripenem, colistin + tigecycline, colistin + rifampicin, gentamicin + meropenem, gentamicin + tigecycline and the double-carbapenem regimen meropenem + ertapenem) using the chequerboard method. The triple combination colistin + meropenem + tigecycline was also tested...
March 22, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28368074/management-of-carbapenem-resistant-k-pneumoniae-in-allogenic-stem-cell-transplant-recipients-the-turin-bundle
#13
Francesco Giuseppe De Rosa, Silvia Corcione, Stefania Raviolo, Benedetto Bruno, Alessandro Busca
Carbapenem resistance has evolved rapidly since 2001 and the distribution of Carbapenemase-producing Klebsiella pneumoniae (CR-Kp) is currently a public health concern worldwide. In the haematological setting, especially in allogenic transplant, CR-KP infections were associated with a mortality up to 65%. Aim of this report is to describe the management of patients colonized by CR-Kp and undergoing allo-HSCT with a multiple-step intervention strategy: the "Turin bundle". Steps included oral gentamicin (GO) within 20 days before allo-HSCT, avoidance of levofloxacin prophylaxis during neutropenia, treatment of febrile neutropenia with tigecycline 100 mg bid and piperacillin-tazobactam at standard dosages and early appropriate combination therapy for patients with severe sepsis...
April 3, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28368073/molecular-analysis-of-the-ramra-locus-in-clinical-klebsiella-pneumoniae-isolates-with-reduced-susceptibility-to-tigecycline
#14
Cristina Belmar Campos, Martin Aepfelbacher, Moritz Hentschke
Mutations in ramR, a negative regulator of ramA which stimulates transcription of acrA/-B encoding the multidrug efflux pump AcrAB-TolC, were recently shown to result in reduced susceptibility to tigecycline in Klebsiella pneumoniae. We analysed six non-duplicate K. pneumoniae isolates with elevated MICs to tigecycline. All isolates showed transcriptional up-regulation of ramA and acrB as demonstrated by Northern blot and quantitative real-time PCR. Sequencing of the ramR gene revealed deletions in five of the isolates and a premature stop codon in one isolate...
April 3, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28357705/minocycline-for-the-treatment-of-multidrug-and-extensively-drug-resistant-a-baumannii-a-review
#15
REVIEW
Jennifer N Lashinsky, Oryan Henig, Jason M Pogue, Keith S Kaye
Acinetobacter baumannii can cause life-threatening nosocomial infections associated with high rates of morbidity and mortality. In recent years, the increasing number of infections due to extensively drug-resistant Acinetobacter with limited treatment options has resulted in a need for additional therapeutic agents, and a renaissance of older, neglected antimicrobials. This has led to an increased interest in the use of minocycline to treat these infections. Minocycline has been shown to overcome many resistance mechanisms affecting other tetracyclines in A...
March 29, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28348852/pan-genomic-perspective-on-the-evolution-of-the-staphylococcus-aureus-usa300-epidemic
#16
Dorota M Jamrozy, Simon R Harris, Naglaa Mohamed, Sharon J Peacock, Charles Y Tan, Julian Parkhill, Annaliesa S Anderson, Matthew T G Holden
Staphylococcus aureus USA300 represents the dominant community-associated methicillin-resistant S. aureus lineage in the USA, where it is a major cause of skin and soft tissue infections. Previous comparative genomic studies have described the population structure and evolution of USA300 based on geographically restricted isolate collections. Here, we investigated the USA300 population by sequencing genomes of a geographically distributed panel of 191 clinical S. aureus isolates belonging to clonal complex 8 (CC8), derived from the Tigecycline Evaluation and Surveillance Trial program...
May 2016: Microbial Genomics
https://www.readbyqxmd.com/read/28348778/veb-1-extended-spectrum-%C3%AE-lactamase-producing-multidrug-resistant-proteus-mirabilis-sepsis-outbreak-in-a-neonatal-intensive-care-unit-in-india-clinical-and-diagnostic-implications
#17
Sarika Jain, Rajni Gaind, Charu Kothari, Rachna Sehgal, A Shamweel, S S Thukral, Harish K Chellani
INTRODUCTION: Extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae, multidrug-resistant (MDR) pathogens, are increasingly implicated in nosocomial outbreaksworldwide, particularly in neonatal intensive care units (NICUs). Proteus mirabilis is an uncommon nosocomial pathogen causing sepsis in neonates. CASE PRESENTATION: We report an outbreak of ESBL-positive MDR P. mirabilis sepsis involving five babies within 10 days in a NICU, which was promptly detected and managed...
August 2016: JMM Case Reports
https://www.readbyqxmd.com/read/28347850/clinical-features-and-treatment-of-patients-with-vibrio-vulnificus-infection
#18
Wei Yu, Xiaomin Shen, Hongying Pan, Tingting Xiao, Ping Shen, Yonghong Xiao
OBJECTIVES: Infections with Vibrio vulnificus are commonly fatal, and the speed and accuracy of diagnosis and treatment is directly linked to mortality. The main aims of this study were to investigate the clinical characteristics of six patients with V. vulnificus infections retrospectively and to determine the effect of treatment with tigecycline (TGC) alone compared with doxycycline plus ceftazidime (DOX/CAZ). METHODS: The medical records of patients were reviewed...
March 24, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28341098/antimicrobial-activity-of-tigecycline-and-cefoperazone-sulbactam-tested-against-18-386-gram-negative-organisms-from-europe-and-the-asia-pacific-region-2013-2014
#19
M A Pfaller, R K Flamm, L R Duncan, R E Mendes, R N Jones, H S Sader
A total of 18,386 organisms, including 13,224 Enterobacteriaceae, 3536 Pseudomonas aeruginosa, 1254 Acinetobacter spp., and 372Stenotrophomonas maltophilia were collected from Western Europe (WEU; n=10,021), Eastern Europe (EEU; n=4957), and the Asia-Pacific region (APAC; n=3408 [1052 from China]) in 2013-2014 as part of the SENTRY Antimicrobial Surveillance Program and tested by a reference broth microdilution method for susceptibility against tigecycline, cefoperazone/sulbactam, and comparator agents. Overall, 95...
March 6, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28333250/the-complexity-of-minocycline-serum-protein-binding
#20
Jian Zhou, Brian T Tran, Vincent H Tam
Objectives: Serum protein binding is critical for understanding the pharmacology of antimicrobial agents. Tigecycline and eravacycline were previously reported to have atypical non-linear protein binding; the percentage of free fraction decreased with increasing total concentration. In this study, we extended the investigation to other tetracyclines and examined the factors that might impact protein binding. Methods: Different minocycline concentrations (0.5-50 mg/L) and perfusion media (saline, 0...
February 25, 2017: Journal of Antimicrobial Chemotherapy
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