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https://www.readbyqxmd.com/read/27924470/emerging-issues-and-treatment-strategies-in-carbapenem-resistant-enterobacteriaceae-cre
#1
REVIEW
Dana R Bowers, Vanthida Huang
Carbapenems are the broadest spectrum antimicrobials utilized in the treatment of serious infections since the 1980s. Soon after their introduction, the discovery of carbapenem-resistant Enterobacteriaceae (CRE) was reported in the 1990s. Invasive CRE infections are associated with high mortality and limited treatment options making care for patients with these infections challenging for clinicians. Current practice has reverted back to the use of "older" antimicrobials, such as the polymyxins, tigecycline, and fosfomycin, to combat invasive CRE infections...
December 2016: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/27924410/does-antibiotic-resistance-evolve-in-hospitals
#2
Anna Seigal, Portia Mira, Bernd Sturmfels, Miriam Barlow
Nosocomial outbreaks of bacteria are well documented. Based on these incidents, and the heavy usage of antibiotics in hospitals, it has been assumed that antibiotic resistance evolves in hospital environments. To test this assumption, we studied resistance phenotypes of bacteria collected from patient isolates at a community hospital over a 2.5-year period. A graphical model analysis shows no association between resistance and patient information other than time of arrival. This allows us to focus on time-course data...
December 6, 2016: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/27922236/microorganisms-isolated-from-cultures-and-infection-focus-and-antibiotic-treatments-in-febrile-neutropenic-children-from-%C3%A5-anl%C3%A4-urfa-turkey
#3
Z Canan Özdemir, Ahmet Koç, Ali Ayçiçek
Chemotherapy induced febrile neutropenia predisposes patients to life threatening infections. We aimed to determine the causative microorganisms, infection focus and antibiotic treatment success in febrile neutropenic children with leukemia. A total of 136 febrile neutropenic episodes in 48 leukemic children were reviewed retrospectively from records. Among 136 febrile neutropenic episodes, 68 (50%) episodes were microbiologically documented. Methicillin sensitive coagulase (-) Staphylococcus aureus were the most common isolates from hemoculture (20...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27920884/novel-combinations-of-synthesized-zno-nps-and-ceftazidime-evaluation-of-their-activity-against-standards-and-new-clinically-isolated-pseudomonas-aeruginosa
#4
Elham Isaei, Shahla Mansouri, Fereshteh Mohammadi, Sadegh Taheritarigh, Zohreh Mohammadi
BACKGROUND: Antibiotic resistant bacteria can be considered as a main problem in infection management. Zinc oxide nanoparticles (ZnO NPs), individually or in combination with antibiotics, can be considered as good candidates for struggling against drug resistant bacteria. METHODS: In this study, Zinc oxide nanoparticles were synthesized using sol-gel method in low temperature as a cost effective procedure and characterized by X-ray diffraction and Scanning Electron Microscopy...
October 2016: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/27912842/the-rapid-spread-of-carbapenem-resistant-enterobacteriaceae
#5
REVIEW
Robert F Potter, Alaric W D'Souza, Gautam Dantas
Carbapenems, our one-time silver bullet for multidrug resistant bacterial infections, are now threatened by widespread dissemination of carbapenem-resistant Enterobacteriaceae (CRE). Successful expansion of Enterobacteriaceae clonal groups and frequent horizontal gene transfer of carbapenemase expressing plasmids are causing increasing carbapenem resistance. Recent advances in genetic and phenotypic detection facilitate global surveillance of CRE diversity and prevalence. In particular, whole genome sequencing enabled efficient tracking, annotation, and study of genetic elements colocalized with carbapenemase genes on chromosomes and on plasmids...
November 2016: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
https://www.readbyqxmd.com/read/27895902/effect-of-%C3%AE-lactamase-inhibitors-on-in-vitro-activity-of-%C3%AE-lactam-antibiotics-against-burkholderia-cepacia-complex-species
#6
Annelien Everaert, Tom Coenye
BACKGROUND: Bacteria belonging to the Burkholderia cepacia complex (Bcc) are an important cause of chronic respiratory tract infections in cystic fibrosis patients. Intrinsic resistance to a wide range of antimicrobial agents, including a variety of β-lactam antibiotics, is frequently observed in Bcc strains. Resistance to β-lactams is most commonly mediated by efflux pumps, alterations in penicillin-binding proteins or the expression of β-lactamases. β-lactamase inhibitors are able to restore the in vitro activity of β-lactam molecules against a variety of Gram-negative species, but the effect of these inhibitors on the activity of β-lactam treatment against Bcc species is still poorly investigated...
2016: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/27895014/ceftazidime-avibactam-as-salvage-therapy-for-infections-caused-by-carbapenem-resistant-organisms-a-case-series-from-the-compassionate-use-program
#7
Elizabeth Temkin, Julian Torre-Cisneros, Bojana Beovic, Natividad Benito, Maddalena Giannella, Raúl Gilarranz, Cameron Jeremiah, Belén Loeches, Isabel Machuca, María José Jiménez-Martín, José Antonio Martínez, Marta Mora-Rillo, Enrique Navas, Michael Osthoff, Juan Carlos Pozo, Juan Carlos Ramos Ramos, Marina Rodriguez, Miguel Sánchez García, Pierluigi Viale, Michel Wolff, Yehuda Carmeli
Ceftazidime-avibactam (CAZ-AVI) is a recently approved β-lactam β-lactamase inhibitor combination with the potential to treat serious infections caused by carbapenem-resistant organisms. Few patients with such infections were included in the CAZ-AVI clinical trials, and clinical experience is lacking. We present a case series of patients with infections caused by carbapenem-resistant Enterobacteriaceae (CRE) or Pseudomonas aeruginosa (CRPa) who were treated with CAZ-AVI salvage therapy on a compassionate-use basis...
November 28, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27894388/-analysis-of-distribution-and-drug-resistance-of-pathogens-isolated-from-541-hospitalized-children-with-burn-infection
#8
J X Dai, L Li, L Xu, Z H Chen, X Y Li, M Liu, Y Q Wen, X D Chen
Objective: To investigate the distribution and drug resistance of pathogens isolated from hospitalized children with burn infection. Methods: Totally 541 patients were hospitalized in Fujian Medical University Union Hospital, the 180th Hospital of Chinese People's Liberation Army(PLA), the 92th Hospital of PLA, and Longyan First Hospital from January 2013 to December 2015. Totally 848 clinical specimens (blood, catheter tip attachments, wound exudate, etc.) were collected for pathogen detection. After being identified by an automatic microbiological identification system, drug resistance of pathogens to 41 commonly-used antibiotics in clinic including gentamicin, aztreonam, erythromycin, clindamycin, etc...
November 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/27889501/endophthalmitis-after-clear-corneal-cataract-surgery-outcomes-over-two-decades
#9
Nicolas A Yannuzzi, Nancy Si, Nidhi Relhan, Ajay E Kuriyan, Thomas A Albini, Audina M Berrocal, Janet L Davis, William E Smiddy, Justin Townsend, Darlene Miller, Harry W Flynn
PURPOSE: To report the clinical features, causative organisms, and visual acuity (VA) outcomes associated with acute-onset endophthalmitis after clear corneal cataract surgery over the past two decades. DESIGN: Retrospective case series. METHODS: Clinical and microbiology records were reviewed for 63 eyes of 63 patients who presented to a tertiary referral center between 2006 and 2015 with culture-positive endophthalmitis occurring within 6 weeks of clear corneal cataract surgery...
November 23, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/27889371/identification-and-molecular-characterization-of-escherichia-coli-blashv-genes-in-a-chinese-teaching-hospital
#10
Mei Zhu, Guangjian Yang, Ailing Li, Li Zong, Zhaoguang Dong, Junwan Lu, Kaibo Zhang, Cong Cheng, Qingli Chang, Xiuying Wu, Jianchao Ying, Xianneng Li, Li Ding, Haixiao Zheng, Junping Yu, Jun Ying, Teng Xu, Huiguang Yi, Peizhen Li, Kewei Li, Songquan Wu, Qiyu Bao, Junrong Wang
Escherichia coli (E. coli) commonly reside in human intestine and most E. coli strains are harmless, but some serotypes cause serious food poisoning. This study identified and molecularly characterized E. coli blaSHV genes from 490 E. coli strains with multi-drug resistance in a hospital population. PCR and molecular cloning and southern blot were performed to assess functions and localizations of this resistant E. coli gene and the pulsed-field gel electrophoresis (PFGE) was utilized to demonstrate the clonal relatedness of the positive E...
November 23, 2016: Gene
https://www.readbyqxmd.com/read/27887765/activity-of-ceftazidime-avibactam-against-multidrug-resistance-enterobacteriaceae-expressing-combined-mechanisms-of-resistance
#11
Inmaculada López-Hernández, Noemí Alonso, Marta Fernández-Martínez, Laura Zamorano, Alba Rivera, Antonio Oliver, M Carmen Conejo, Luis Martínez-Martínez, Ferrán Navarro, Alvaro Pascual
INTRODUCTION: Antimicrobial resistance in Enterobacteriaceae is increasing worldwide and is making treating infections caused by multidrug-resistant Enterobacteriaceae a challenge. The use of β-lactam agents is compromised by microorganisms harboring extended-spectrum β-lactamases (ESBLs) and other mechanisms of resistance. Avibactam is a non β-lactam agent that inhibits clinically relevant β-lactamases, such as ESBL and AmpC. The ceftazidime-avibactam combination (CAZ-AVI) was recently approved for use in certain complicated infections, and may provide a therapeutic alternative for infections caused by these microorganisms...
November 22, 2016: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/27886280/starvation-and-antibiotics-induced-formation-of-persister-cells-in-pseudomonas-aeruginosa
#12
Patrik Mlynarcik, Milan Kolar
BACKGROUND: Planktonic stationary and exponential cultures of Pseudomonas aeruginosa are highly resistant to killing by bactericidal antimicrobials because of the presence of persisters, cells that are multidrug tolerant and play a key role in the recalcitrance of biofilm infections. AIM: The aim of this study was to investigate the formation of persister cells in P. aeruginosa stationary vs. exponential cultures using different class antimicrobials. METHODS: The susceptibilities of P...
November 23, 2016: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/27886041/antimicrobial-susceptibility-of-pseudomonas-aeruginosa-before-and-after-initiation-of-inhaled-tobramycin-in-bulgaria
#13
Guergana Petrova, Tanya Strateva, Dimitrinka Miteva, Snezhina Lazova, Penka Perenovska
INTRODUCTION: In aim to achieve better infection control and possible eradication of the pathogens involved in chronic infections of patients with cystic fibrosis (CF) scientists have developed a new way to administer antimicrobials - inhalation. The first and so far the only available inhalable antimicrobial in Bulgaria is inhaled tobramycin (TOBI), introduced in 2009. We aimed to evaluate the antimicrobial susceptibility of Pseudomonas aeruginosa isolates from cystic fibrosis (CF) patients before and after initiation of TOBI in the regular treatment regimen...
November 24, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27885293/prevalence-of-extended-spectrum-beta-lactamase-producing-klebsiella-pneumoniae-isolated-from-urinary-tract-infected-patients
#14
P Chaudhary, D Bhandari, K Thapa, P Thapa, D Shrestha, H K Chaudhary, A Shrestha, H Parajuli, B P Gupta
BACKGROUND: Klebsiella pneumoniae, one of the bacterial agents associated with urinary tract infection has been often implicated as a major extended spectrum beta-lactamase (ESBL) producer in last few decades. This study was designed to assess the prevalence of ESBL producing Klebsiella pneumoniae in urinary isolates at a tertiary care hospital in Kathmandu, Nepal, from July to December 2014. METHODS: One thousand nine hundred eighty six mid-stream urine specimens were collected aseptically from the clinically suspected patients of urinary tract infections attending Capital Hospital and Research Center, Kathmandu...
May 2016: Journal of Nepal Health Research Council
https://www.readbyqxmd.com/read/27882513/comparison-of-clinico-microbiological-profile-and-treatment-outcome-of-in-house-and-referred-post-cataract-surgery-endophthalmitis-in-a-tertiary-care-center-in-south-india
#15
Vikas Ambiya, Taraprasad Das, Savitri Sharma, Jay Chhablani, Vivek Dave, Subhadra Jalali, Raja Narayanan, Joveeta Joseph
BACKGROUND: The purpose of the study is to compare the clinico-microbiological profile and treatment outcome of in-house vs referred cases of post cataract surgery endophthalmitis in a tertiary eye care facility in South India. METHODS: The clinical records of 50 culture-positive cases each of in-house (group A) and referred (group B) post cataract surgery endophthalmitis were analyzed. The management protocol was similar in both groups. RESULTS: The time to report to the institute was longer in group B (group B 13...
December 2016: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/27873565/patterns-of-virulence-factor-expression-and-antimicrobial-resistance-in-achromobacter-xylosoxidans-and-achromobacter-ruhlandii-isolates-from-patients-with-cystic-fibrosis
#16
R H V Pereira, R S Leão, A P Carvalho-Assef, R M Albano, E R A Rodrigues, M C Firmida, T W Folescu, M C Plotkowski, V G Bernardo, E A Marques
Achromobacter spp. are opportunistic pathogens increasingly recovered from adult patients with cystic fibrosis (CF). We report the characterization of 122 Achromobacter spp. isolates recovered from 39 CF patients by multilocus sequence typing, virulence traits, and susceptibility to antimicrobials. Two species, A. xylosoxidans (77%) and A. ruhlandii (23%) were identified. All isolates showed a similar biofilm formation ability, and a positive swimming phenotype. By contrast, 4·3% and 44·4% of A. xylosoxidans and A...
November 22, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27872073/exploring-the-role-of-the-%C3%AE-loop-in-the-evolution-of-ceftazidime-resistance-in-the-pena-%C3%AE-lactamase-from-burkholderia-multivorans-an-important-cystic-fibrosis-pathogen
#17
Krisztina M Papp-Wallace, Scott A Becka, Magdalena A Taracila, Elise T Zeiser, Julian A Gatta, John J LiPuma, Robert A Bonomo
The unwelcome evolution of resistance to the advanced generation cephalosporin antibiotic, ceftazidime is hindering the effective therapy of Burkholderia cepacia complex (Bcc) infections. Regrettably, Bcc are highly resistant to most antibiotics, including polymyxins; ceftazidime and trimethoprim-sulfamethoxazole are the most effective treatment options. Unfortunately, resistance to ceftazidime is increasing and posing a health threat to populations susceptible to Bcc infection. We found that up to 36% of 146 tested Bcc clinical isolates were non-susceptible to ceftazidime...
November 21, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27872067/in-vitro-activity-of-ceftazidime-avibactam-against-isolates-in-a-phase-3-open-label-clinical-trial-for-complicated-intra-abdominal-and-urinary-tract-infections-caused-by-ceftazidime-nonsusceptible-gram-negative-pathogens
#18
Gregory G Stone, Patricia A Bradford, Paul Newell, Angela Wardman
In vitro activity of ceftazidime-avibactam was evaluated against 341 Gram-negative isolates from 333 patients in a randomized, phase 3 clinical trial of patients with complicated urinary tract or intra-abdominal infections caused by ceftazidime nonsusceptible pathogens (NCT01644643). Ceftazidime-avibactam MIC90 values against Enterobacteriaceae and Pseudomonas aeruginosa (including several class B or D enzyme-producers that avibactam does not inhibit) were 1 and 64 μg/ml, respectively. Overall, ceftazidime-avibactam activity against ceftazidime-nonsusceptible isolates was comparable to the activity of ceftazidime-avibactam previously reported against ceftazidime-susceptible isolates...
November 21, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27855144/notes-from-the-field-fungal-bloodstream-infections-associated-with-a-compounded-intravenous-medication-at-an-outpatient-oncology-clinic-new-york-city-2016
#19
Amber M Vasquez, Jason Lake, Stephanie Ngai, Megan Halbrook, Snigdha Vallabhaneni, M Shannon Keckler, Heather Moulton-Meissner, Shawn R Lockhart, Christopher T Lee, Kiran Perkins, Joseph F Perz, Mike Antwi, Miranda S Moore, Jane Greenko, Eleanor Adams, Janet Haas, Sandra Elkind, Marjorie Berman, Dani Zavasky, Tom Chiller, Joel Ackelsberg
On May 24, 2016, the New York City Department of Health and Mental Hygiene notified CDC of two cases of Exophiala dermatitidis bloodstream infections among patients with malignancies who had received care from a single physician at an outpatient oncology facility (clinic A). Review of January 1-May 31, 2016 microbiology records identified E. dermatitidis bloodstream infections in two additional patients who also had received care at clinic A. All four patients had implanted vascular access ports and had received intravenous (IV) medications, including a compounded IV flush solution containing saline, heparin, vancomycin, and ceftazidime, compounded and administered at clinic A...
November 18, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27854165/antimicrobial-resistance-mechanisms-and-genetic-diversity-of-multidrug-resistant-acinetobacter-baumannii-isolated-from-a-teaching-hospital-in-malaysia
#20
Shirin Biglari, Alfizah Hanafiah, Shaliawani Mohd Puzi, Ramliza Ramli, Mostafizur Rahman, Bruno Silvester Lopes
Multidrug-resistant (MDR) Acinetobacter baumannii has increasingly emerged as an important nosocomial pathogen. The aim of this study was to determine the resistance profiles and genetic diversity in A. baumannii clinical isolates in a tertiary medical center in Malaysia. The minimum inhibitory concentrations of carbapenems (imipenem and meropenem), cephalosporins (ceftazidime and cefepime), and ciprofloxacin were determined by E-test. PCR and sequencing were carried out for the detection of antibiotic resistance genes and mutations...
November 17, 2016: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
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