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Multidrug resistant gram negative bacteria

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https://www.readbyqxmd.com/read/28803838/current-epidemiology-of-resistance-among-gram-negative-bacilli-in-pediatric-patients-in-turkey
#1
Kubra Aykac, Yasemin Ozsurekci, Sevgen Tanir Basaranoglu, Mustafa Senol Akin, Ali Bulent Cengiz, Asiye Bicakcigil, Banu Sancak, Ates Kara, Mehmet Ceyhan
BACKGROUND: The increasing incidence of infections caused by drug-resistant Gram-negative organisms has led to a reemergence in worldwide. This study attempted to investigate the changes in resistance of Gram-negative bacteria to different classes of antibiotics and treatment options in invasive infections. METHODS: We performed this study retrospectively between January 2012 and January 2017 in our tertiary care university hospital. A total of 302 patients with Gram-negative bacterial bacteremia and meningitis were defined...
August 10, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28803661/daily-bathing-strategies-and-cross-transmission-of-multidrug-resistant-organisms-impact-of-chlorhexidine-impregnated-wipes-in-a-multidrug-resistant-gram-negative-bacteria-endemic-intensive-care-unit
#2
Jesus Ruiz, Paula Ramirez, Esther Villarreal, Monica Gordon, Inmaculada Saez, Alfonso Rodríguez, María Jesús Castañeda, Álvaro Castellanos-Ortega
BACKGROUND: Health-care associated infections are a major cause of morbidity and mortality in critical care units. The aim of this study is to evaluate the effectiveness of chlorhexidine gluconate (CHG)-impregnated wipes in the daily bathing of patients in an intensive care unit (ICU) to prevent cross-transmission and colonization by multidrug-resistant organisms (MDROs) METHODS: Prospective cohort study with an intervention of 11 months. The intervention consisted of using CHG-impregnated wipes for the daily bathing of patients on mechanical ventilation or colonized by MDROs...
August 10, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28803496/management-of-multidrug-resistant-pseudomonas-aeruginosa-in-the-intensive-care-unit-state-of-the-art
#3
Alberto Enrico Maraolo, Marco Cascella, Silvia Corcione, Arturo Cuomo, Salvatore Nappa, Guglielmo Borgia, Francesco Giuseppe De Rosa, Ivan Gentile
Pseudomonas aeruginosa (PA) is one of the most important causes of healthcare-related infections among Gram-negative bacteria. The best therapeutic approach is controversial, especially for multidrug-resistant (MDR) and extensively drug-resistant (XDR) strains as well as in the setting of most severe patients, such as in the intensive care unit (ICU). Areas covered: This article addresses several points. First, the main microbiological aspects of PA, focusing on its wide array of resistance mechanisms. Second, risk factors and the worse outcome linked to MDR-PA infection...
August 14, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28799523/bactericidal-activity-of-the-ti-13nb-13zr-alloy-against-different-species-of-bacteria-related-with-implant-infection
#4
John-Jairo Aguilera-Correa, Ana Conde, Maria-Angeles Arenas, Juan-Jose de-Damborenea, Miguel Marin, Antonio L Doadrio, Jaime Esteban
The Ti-6Al-4V alloy is one of the most commonly used in orthopedic surgery. Despite its advantages, there is an increasing need to use new titanium alloys with no toxic elements and improved biomechanical properties, such as Ti-13Nb-13Zr. Prosthetic joint infections (PJI) are mainly caused by Gram-positive bacteria; however, Gram-negative bacteria are a growing problem due to associated multidrug resistance. In this study, the bacterial adherence and viability on the Ti-13Nb-13Zr alloy have been compared to that of the Ti-6Al-4V alloy using 16 collection and clinical strains of bacterial species related to PJI: Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Pseudomonas aeruginosa...
August 11, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28798903/anti-quorum-sensing-and-anti-biofilm-activity-of-delftia-tsuruhatensis-extract-by-attenuating-the-quorum-sensing-controlled-virulence-factor-production-in-pseudomonas-aeruginosa
#5
Vijay K Singh, Avinash Mishra, Bhavanath Jha
Multidrug-resistance bacteria commonly use cell-to-cell communication that leads to biofilm formation as one of the mechanisms for developing resistance. Quorum sensing inhibition (QSI) is an effective approach for the prevention of biofilm formation. A Gram-negative bacterium, Delftia tsuruhatensis SJ01, was isolated from the rhizosphere of a species of sedge (Cyperus laevigatus) grown along the coastal-saline area. The isolate SJ01 culture and bacterial crude extract showed QSI activity in the biosensor plate containing the reference strain Chromobacterium violaceum CV026...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28797324/novel-mcr-3-variant-encoding-mobile-colistin-resistance-in-an-st131-escherichia-coli-isolate-from-bloodstream-infection-denmark-2014
#6
Louise Roer, Frank Hansen, Marc Stegger, Ute Wolff Sönksen, Henrik Hasman, Anette M Hammerum
A novel variant of the plasmid-borne colistin resistance gene mcr-3 was detected on an IncHI2 plasmid in an ST131 CTX-M-55-producing Escherichia coli isolate from a Danish patient with bloodstream infection in 2014. The discovery of novel plasmid-borne genes conferring resistance to colistin is of special interest since colistin has reemerged as an important drug in the treatment of infections with multidrug-resistant Gram-negative bacteria.
August 3, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28796905/aerobic-uterine-isolates-and-antimicrobial-susceptibility-in-mares-with-post-partum-metritis
#7
M S Ferrer, R Palomares
BACKGROUND: The potential for life-threatening complications of metritis requires prompt initiation of antimicrobial treatment, often before microbiological test results are reported. However, published studies to guide first-line antibiotic selection are scarce. OBJECTIVES: To report the most frequent bacterial species, antimicrobial susceptibility and prevalence of multidrug resistance (MDR) in cases of equine metritis. STUDY DESIGN: Retrospective analysis of uterine bacterial culture and antimicrobial susceptibility test (AST) results from mares with metritis...
August 10, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/28780105/short-communication-extended-spectrum-cephalosporin-resistant-escherichia-coli-in-colostrum-from-new-brunswick-canada-dairy-cows-harbor-blacmy-2-and-blatem-resistance-genes
#8
B B Awosile, J T McClure, J Sanchez, J VanLeeuwen, J C Rodriguez-Lecompte, G Keefe, L C Heider
Dairy calves are colonized shortly after birth by multidrug resistant (MDR) bacteria, including Escherichia coli. The role of dairy colostrum fed to calves as a potential source of MDR bacteria resistance genes has not been investigated. This study determined the recovery rate of extended-spectrum cephalosporin-resistant (ESC-R) E. coli in colostrum from cows. The ESC-R E. coli isolates were further investigated to determine their phenotypic antimicrobial resistance pattern and the genes conferring ESC-R. Fresh colostrum was collected from 452 cows from 8 dairy herds in New Brunswick, Canada...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28762997/investigating-the-biosynthesis-of-natural-products-from-marine-proteobacteria-a-survey-of-molecules-and-strategies
#9
REVIEW
Marshall L Timmermans, Yagya P Paudel, Avena C Ross
The phylum proteobacteria contains a wide array of Gram-negative marine bacteria. With recent advances in genomic sequencing, genome analysis, and analytical chemistry techniques, a whole host of information is being revealed about the primary and secondary metabolism of marine proteobacteria. This has led to the discovery of a growing number of medically relevant natural products, including novel leads for the treatment of multidrug-resistant Staphylococcus aureus (MRSA) and cancer. Of equal interest, marine proteobacteria produce natural products whose structure and biosynthetic mechanisms differ from those of their terrestrial and actinobacterial counterparts...
August 1, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28762368/antibiotic-susceptibility-profiles-of-non-fermenting-gram-negative-bacilli-at-a-tertiary-care-hospital-in-patiala-india
#10
Udhayvir Singh Grewal, Rupinder Bakshi, Geeta Walia, Parth Rajeshbhai Shah
BACKGROUND: Non-fermenting Gram-negative bacilli (NFGNB) have emerged as a major cause of healthcare-associated infections and are innately resistant to many antibiotics. AIM: The aim of this study was to determine the prevalence of NFGNB isolated from various clinical specimens and evaluate their antimicrobial susceptibility profiles. MATERIALS AND METHODS: This retrospective study was done at our Department of Microbiology from December 2015 to December 2016...
April 2017: Nigerian Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28758635/cluster-distinguishing-genotypic-and-phenotypic-diversity-of-carbapenem-resistant-gram-negative-bacteria-in-solid-organ-transplantation-patients-a-comparative-study
#11
Theodoros Karampatakis, Anastasia Geladari, Lida Politi, Charalampos Antachopoulos, Elias Iosifidis, Olga Tsiatsiou, Aggeliki Karyoti, Vasileios Papanikolaou, Athanassios Tsakris, Emmanuel Roilides
PURPOSE: Solid-organ transplant recipients may display high rates of colonization and/or infection by multidrug-resistant bacteria. We analysed and compared the phenotypic and genotypic diversity of carbapenem-resistant (CR) strains of Klebsiella pneumoniae, Pseudomonas aeruginosa and Acinetobacter baumannii isolated from patients in the Solid Organ Transplantation department of our hospital. METHODOLOGY: Between March 2012 and August 2013, 56 CR strains from various biological fluids underwent antimicrobial susceptibility testing with VITEK 2, molecular analysis by PCR amplification and genotypic analysis with pulsed-field gel electrophoresis (PFGE)...
July 31, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28750485/in-vitro-activity-of-diphenyleneiodonium-toward-multidrug-resistant-helicobacter-pylori-strains
#12
Jun-Won Chung, Su Young Kim, Hee Jung Park, Chang Su Chung, Hee Woo Lee, Sun Mi Lee, Inki Kim, Jhang Ho Pak, Gin Hyug Lee, Jin-Yong Jeong
Background/Aims: The increased resistance of Helicobacter pylori to antibiotics has increased the need to develop new treatments for this bacterium. The aim of our study was to identify new drugs with anti-H. pylori activity. Methods: We screened a small molecule library-the library of pharmacologically active compounds (LOPAC), which includes 1,280 pharmacologically active compounds-to identify inhibitors of H. pylori growth. The minimal inhibitory concentrations (MICs) of antibiotics against multidrug-resistant H...
July 28, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28748397/activity-of-the-novel-siderophore-cephalosporin-cefiderocol-against-multidrug-resistant-gram-negative-pathogens
#13
J Dobias, V Dénervaud-Tendon, L Poirel, P Nordmann
The novel siderophore cephalosporin cefiderocol (S-649266) with potent activity against Gram-negative pathogens was recently developed (Shionogi & Co., Ltd.). Here, we evaluated the activity of this new molecule and comparators against a collection of previously characterized Gram-negative isolates using broth microdilution panels. A total of 753 clinical multidrug-resistant Gram-negative isolates collected from hospitals worldwide were tested against cefiderocol and antibiotic comparators (ceftolozane-tazobactam [CT], meropenem [MEM], ceftazidime [CAZ], ceftazidime-avibactam [CZA], colistin [CST], aztreonam [ATM], amikacin [AMK], ciprofloxacin [CIP], cefepime [FEP], and tigecycline [TGC]) for their susceptibility...
July 26, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28746396/recovery-of-metallo-tolerant-and-antibiotic-resistant-psychrophilic-bacteria-from-siachen-glacier-pakistan
#14
Muhammad Rafiq, Muhammad Hayat, Alexandre M Anesio, Syed Umair Ullah Jamil, Noor Hassan, Aamer Ali Shah, Fariha Hasan
Cultureable bacterial diversity of previously unexplored Siachen glacier, Pakistan, was studied. Out of 50 isolates 33 (66%) were Gram negative and 17 (34%) Gram positive. About half of the isolates were pigment producers and were able to grow at 4-37°C. 16S rRNA gene sequences revealed Gram negative bacteria dominated by Proteobacteria (especially γ-proteobacteria and β-proteobacteria) and Flavobacteria. The genus Pseudomonas (51.51%, 17) was dominant among γ- proteobacteria. β-proteobacteria constituted 4 (12...
2017: PloS One
https://www.readbyqxmd.com/read/28743813/curative-treatment-of-severe-gram-negative-bacterial-infections-by-a-new-class-of-antibiotics-targeting-lpxc
#15
Nadine Lemaître, Xiaofei Liang, Javaria Najeeb, Chul-Jin Lee, Marie Titecat, Emmanuelle Leteurtre, Michel Simonet, Eric J Toone, Pei Zhou, Florent Sebbane
The infectious diseases caused by multidrug-resistant bacteria pose serious threats to humankind. It has been suggested that an antibiotic targeting LpxC of the lipid A biosynthetic pathway in Gram-negative bacteria is a promising strategy for curing Gram-negative bacterial infections. However, experimental proof of this concept is lacking. Here, we describe our discovery and characterization of a biphenylacetylene-based inhibitor of LpxC, an essential enzyme in the biosynthesis of the lipid A component of the outer membrane of Gram-negative bacteria...
July 25, 2017: MBio
https://www.readbyqxmd.com/read/28743314/multidrug-resistant-bacteria-are-sensitive-to-euphorbia-prostrata-and-six-others-cameroonian-medicinal-plants-extracts
#16
Igor K Voukeng, Veronique P Beng, Victor Kuete
BACKGROUND: Multidrug resistant (MDR) bacteria are responsible for therapeutic failure and there is an urgent need for novels compounds efficient on them. METHODS: Eleven methanol extracts from seven Cameroonian medicinal plants were tested for their antibacterial activity using broth micro-dilution method against 36 MDR bacterial strains including Escherichia coli, Enterobacter aerogenes, Enterobacter cloacae, Klebsiella pneumoniae, Providencia stuartii, Pseudomonas aeruginosa and Staphylococcus aureus...
July 25, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28743282/a-hospital-based-surveillance-of-metallo-beta-lactamase-producing-gram-negative-bacteria-in-nepal-by-imipenem-edta-disk-method
#17
Pratigya Thapa, Dinesh Bhandari, Dhiraj Shrestha, Hiramani Parajuli, Prakash Chaudhary, Jyoti Amatya, Ritu Amatya
BACKGROUND: A rising threat of the rapid spread of acquired metallo-beta-lactamases (MBLs) among major Gram-negative pathogens is a matter of public health concern worldwide. Hence, for a low income nation like Nepal, surveillance data on MBL producing clinical isolates via a cost effective technique is necessary to prevent their dissemination as well as formulation and regulation of antimicrobial stewardship policy. METHODS: The prospective study was conducted at Nepal Medical College, Kathmandu from May to October, 2014 to assess the prevalence of MBL production among ceftazidime-resistant Gram-negative rods (GNRs) isolates...
July 25, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28739115/a-recombinant-protein-of-salmonella-typhi-induces-humoral-and-cell-mediated-immune-responses-including-memory-responses
#18
Sayan Das, Rimi Chowdhury, Shubhamoy Ghosh, Santasabuj Das
Gram negative enteric bacteria, Salmonella enterica serovar Typhi (S. Typhi), the etiological agent of typhoid fever is a major public health problem in developing countries. While a permanent solution to the problem would require improved sanitation, food and water hygiene, controlling the infection by vaccination is urgently required due to the emergence of multidrug resistant strains in multiple countries. The currently licensed vaccines are moderately efficacious with limited applicability, and no recommended vaccines exist for younger children...
July 21, 2017: Vaccine
https://www.readbyqxmd.com/read/28735318/trends-of-bloodstream-infections-in-a-university-greek-hospital-during-a-three-year-period-incidence-of-multidrug-resistant-bacteria-and-seasonality-in-gram-negative-predominance
#19
Fevronia Kolonitsiou, Matthaios Papadimitriou-Olivgeris, Anastasia Spiliopoulou, Vasiliki Stamouli, Vasileios Papakostas, Eleni Apostolopoulou, Christos Panagiotopoulos, Markos Marangos, Evangelos D Anastassiou, Myrto Christofidou, Iris Spiliopoulou
The aim of the study was to assess the epidemiology, the incidence of multidrug-resistant bacteria and bloodstream infections' (BSIs) seasonality in a university hospital. This retrospective study was carried out in the University General Hospital of Patras, Greece, during 2011-13 y. Blood cultures from patients with clinical presentation suggestive of bloodstream infection were performed by the BacT/ALERT System. Isolates were identified by Vitek 2 Advanced Expert System. Antibiotic susceptibility testing was performed by the disk diffusion method and E-test...
July 6, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/28730370/the-n-terminal-and-central-domain-of-colicin-a-enables-phage-lysin-to-lyse-escherichia-coli-extracellularly
#20
Guangmou Yan, Jianfang Liu, Qiang Ma, Rining Zhu, Zhimin Guo, Chencheng Gao, Shuang Wang, Ling Yu, Jingmin Gu, Dongliang Hu, Wenyu Han, Rui Du, Junling Yang, Liancheng Lei
Multidrug-resistant Escherichia coli has seriously threatened antibiotic resources and international public health. Bacteriophage lysin preparations have been widely considered as valid agents for solving multidrug resistances. Many lysins have been derived to treat diseases caused by Gram-positive bacteria, but only a few lysin preparations have been found that successively treat diseases caused by Gram-negative bacteria. The outer membrane of Gram-negative bacteria effectively blocks the interactions between peptidoglycan in the periplasmic space and bacteriophage lysins, which therefore hampers the antimicrobial effects of bacteriophage lysins...
July 20, 2017: Antonie Van Leeuwenhoek
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