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Multi drug resistant bacteria

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https://www.readbyqxmd.com/read/28936051/bacterial-contamination-of-multi-dose-eye-drops-at-ophthalmology-department-university-of-gondar-northwest-ethiopia
#1
Asegedech Tsegaw, Asamere Tsegaw, Tefera Abula, Yared Assefa
PURPOSE: Ophthalmic solutions used for both diagnostic and therapeutic purposes were found to be contaminated with bacteria pathogens and caused serious ocular infections such as keratitis and endophthalmitis. The objective was to assess the magnitude and pattern of bacterial contamination of multi-dose ophthalmic medications and investigate the drug susceptibility pattern of the isolates in the Department of Ophthalmology at Gondar University Teaching Hospital. METHODS: A total of 100 ophthalmic medications in-use by patients and eye-care workers have been taken and cultured for potential bacterial contamination in the Microbiology Department after 1 week and >1 week of use...
April 2017: Middle East African Journal of Ophthalmology
https://www.readbyqxmd.com/read/28935900/antibacterial-and-immunomodulatory-activities-of-insect-defensins-dlp2-and-dlp4-against-multidrug-resistant-staphylococcus-aureus
#2
Zhanzhan Li, Ruoyu Mao, Da Teng, Ya Hao, Huixian Chen, Xiumin Wang, Xiao Wang, Na Yang, Jianhua Wang
Methicillin-resistant Staphylococcus aureus (MRSA), are the most frequent cause of sepsis, which urgently demanding new drugs for treating infection. Two homologous insect CSαβ peptides-DLP2 and DLP4 from Hermetia illucens were firstly expressed in Pichia pastoris, with the yields of 873.5 and 801.3 mg/l, respectively. DLP2 and DLP4 displayed potent antimicrobial activity against Gram-positive bacteria especially MRSA and had greater potency, faster killing, and a longer postantibiotic effect than vancomycin...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28928474/using-experimental-evolution-to-identify-druggable-targets-that-could-inhibit-the-evolution-of-antimicrobial-resistance
#3
Heer H Mehta, Amy G Prater, Yousif Shamoo
With multi-drug and pan-drug-resistant bacteria becoming increasingly common in hospitals, antibiotic resistance has threatened to return us to a pre-antibiotic era that would completely undermine modern medicine. There is an urgent need to develop new antibiotics and strategies to combat resistance that are substantially different from earlier drug discovery efforts. One such strategy that would complement current and future antibiotics would be a class of co-drugs that target the evolution of resistance and thereby extend the efficacy of specific classes of antibiotics...
September 20, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28926883/-etiological-analysis-and-in-vitro-drug-sensitivity-of-bacterial-keratitis-in-northern-china-in-the-period-of-2006-2015
#4
Y Zhang, Z Q Wang, X G Sun
Objective: To analyze the etiology and drug sensitivity of bacterial keratitis and their changes, and to provide evidence for treatment and drug selection of bacterial keratitis. Methods: Retrospective case series study. From January 2006 to December 2015, corneal specimens suspected of bacterial infection were collected and cultured in Beijing Tongren Eye Center. General information of patients, etiological results and drug sensitivity test results were summarized and analyzed. The Chi-square test and Spearman correlation analysis were performed using SPSS 20...
September 11, 2017: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28920793/multi-drug-resistance-patterns-of-enteric-bacteria-in-two-populations-of-free-ranging-eastern-box-turtles-terrapene-carolina-carolina
#5
Cari Rasmussen, Matthew C Allender, Christopher A Phillips, John Byrd, Terrell Lloyd, Carol Maddox
Gram-negative isolates (n = 84) from 71% of free-ranging Eastern box turtles (Terrapene carolina carolina) in Illinois and Tennessee, United States, demonstrated resistance to at least one antibiotic while 30% of isolates demonstrated resistance to two or more antibiotics. Resistance was observed against cefoxitin, amoxicillin-clavulanic acid, cefazolin, ampicillin, ticarcillin, cefovecin, and ceftiofur. Gram-positive bacteria were isolated from 49 turtles, and all were observed to be resistant to two or more antibiotics...
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28915819/bacteriophage-therapy-to-combat-bacterial-infections-in-poultry
#6
REVIEW
Andrzej Wernicki, Anna Nowaczek, Renata Urban-Chmiel
Infections in poultry are an economic and health problem in Europe and worldwide. The most common infections are associated with salmonellosis, colibacillosis, campylobacteriosis, and others. The prevalence of Campylobacter-positive poultry flocks in European countries varies from 18% to 90%. In the United States, the prevalence of infected flocks is nearly 90%. A similar percentage of infection has been noted for salmonellosis (about 75-90%) and E. coli (90-95%). The occurence of Clostridium perfringens is a major problem for the poultry industry, with some estimates suggesting colonization of as many as 95% of chickens, resulting in clinical or subclinical infections...
September 16, 2017: Virology Journal
https://www.readbyqxmd.com/read/28915236/modeling-antibiotic-treatment-in-hospitals-a-systematic-approach-shows-benefits-of-combination-therapy-over-cycling-mixing-and-mono-drug-therapies
#7
Burcu Tepekule, Hildegard Uecker, Isabel Derungs, Antoine Frenoy, Sebastian Bonhoeffer
Multiple treatment strategies are available for empiric antibiotic therapy in hospitals, but neither clinical studies nor theoretical investigations have yielded a clear picture when which strategy is optimal and why. Extending earlier work of others and us, we present a mathematical model capturing treatment strategies using two drugs, i.e the multi-drug therapies referred to as cycling, mixing, and combination therapy, as well as monotherapy with either drug. We randomly sample a large parameter space to determine the conditions determining success or failure of these strategies...
September 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28912764/resistance-to-antibiotics-biocides-preservatives-and-metals-in-bacteria-isolated-from-seafoods-co-selection-of-strains-resistant-or-tolerant-to-different-classes-of-compounds
#8
José L Romero, María J Grande Burgos, Rubén Pérez-Pulido, Antonio Gálvez, Rosario Lucas
Multi-drug resistant bacteria (particularly those producing extended-spectrum β-lactamases) have become a major health concern. The continued exposure to antibiotics, biocides, chemical preservatives, and metals in different settings such as the food chain or in the environment may result in development of multiple resistance or co-resistance. The aim of the present study was to determine multiple resistances (biocides, antibiotics, chemical preservatives, phenolic compounds, and metals) in bacterial isolates from seafoods...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28910943/-study-on-antibiotic-resistance-of-escherichia-coli-and-enterococcus-colonized-in-intestine-of-neonates-from-neonatal-intensive-care-unit
#9
X F Li, Z J Liu, X Chen, J Li, Z G Cui, B Kan, J R Ma, J H Cui
Objective: To understand the antibiotic resistance of bacteria colonized in intestine of the neonates from neonatal intensive care unit (NICU) and provide evidence to guide clinical antibiotic treatment. Methods: From May, 2014 to May, 2015, a total of 572 stool samples were collected from the neonates of NICU in our hospital. Escherichia coli and Enterococcus were detected with VITEK-2 system. Results: A total of 328 strains of E. coli and 243 strains of Enterococcus were isolated respectively in this study...
September 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28893690/new-agents-for-the-treatment-of-infections-with-gram-negative-bacteria-restoring-the-miracle-or-false-dawn
#10
REVIEW
Hugh Wright, Robert A Bonomo, David L Paterson
BACKGROUND: Antibiotic resistance in gram-negative resistance has developed without a commensurate response in the successful development of antibiotic agents, though recent progress has been made. AIMS: This review aims to provide a summary of the existing evidence on efficacy, spectrum of activity and the development of resistance of new agents that have been licensed or completed advanced clinical trials that possess activity against resistant gram-negative organisms...
September 8, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28891372/controversies-and-advances-in-the-management-of-ventilator-associated-pneumonia
#11
Katherine L Roberts, Marin H Kollef, Scott T Micek, Paul Juang
Although national surveillance data suggests that the incidence of ventilator associated pneumonia (VAP) is down-trending, it remains one of the most commonly encountered hospital acquired infections in the United States and worldwide. Its association with increased healthcare costs and worsened patient outcomes warrants continued effort to improve the care of patients with VAP. Areas covered: The increasing prevalence of multi-drug resistant bacteria further drives the need to explore advances in diagnostic and treatment options...
September 11, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28890939/adaptive-modulation-of-antibiotic-resistance-through-intragenomic-coevolution
#12
Michael J Bottery, A Jamie Wood, Michael A Brockhurst
Bacteria gain antibiotic resistance genes by horizontal acquisition of mobile genetic elements (MGE) from other lineages. Newly acquired MGEs are often poorly adapted causing intragenomic conflicts, resolved by compensatory adaptation of the chromosome, the MGE or reciprocal coadaptation. The footprints of such intragenomic coevolution are present in bacterial genomes, suggesting an important role promoting genomic integration of horizontally acquired genes, but direct experimental evidence of the process is limited...
September 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28888884/prevalence-of-antimicrobial-resistance-and-integron-gene-cassettes-in-escherichia-coli-isolated-from-yaks-poephagus-grunniens-in-aba-tibetan-autonomous-prefecture-china
#13
Xin Yang, Wencheng Zou, Jinxin Zeng, Shengze Xie, Tianwu An, Xiaolin Luo, Danyu Chen, Lan Feng, Guangyang Cheng, Run Cai, Qianru Huang, Hongning Wang
BACKGROUND: Escherichia coli (E. coli) is one of the most relevant opportunistic pathogenic bacteria as it may cause severe morbidity and mortality in yaks (poephagus grunniens). In recent years, several kinds of antibiotics have been widely used in Tibetan areas to treat the bacterial diseases, resulting in serious repercussions on the bacterial antibiotic resistance in yaks. This investigation was conducted in order to determine the prevalence of antimicrobial resistance and integron gene cassettes in E...
September 6, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28883810/from-farms-to-markets-gram-negative-bacteria-resistant-to-third-generation-cephalosporins-in-fruits-and-vegetables-in-a-region-of-north-africa
#14
Ferielle Mesbah Zekar, Sophie A Granier, Muriel Marault, Lydia Yaici, Benoit Gassilloud, Charles Manceau, Abdelaziz Touati, Yves Millemann
The role of food in human exposure to antimicrobial-resistant bacteria is a growing food safety issue. The contribution of fruits and vegetables eaten raw to this exposure is still unclear. The evaluation of contamination levels of fruits, vegetables and the agricultural environment by third-generation cephalosporin (3GC)-resistant Gram-negative bacteria was performed by analyzing 491 samples of fruits and vegetables collected from 5 markets and 7 farms in Bejaia area, north-eastern Mediterranean coast of Algeria...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28883646/heat-conjugation-of-antibacterial-agents-from-amino-acids-and-plant-oil
#15
Man Tang, Yanchao Zhou, Jiayang Gao, Jingli Peng, Yuan Wang, Qirui Zhao, Lihao Liao, Kai Wang, Mengjia Pan, Meng Xing, Wen Pan, Danling Dai, Min Fu, Li Yu, Chuqing Zhang, Yuchuan Wang, Ying Zhang, Li Xu, Jing Li, Xiao Bao, Wenxian Piao, Shihong Lin, Kaibei Lu, Xuelan Zhang, Weiguo Cao, Kai Yang, Zhumei He, Shaoping Weng, Qiuyun Liu, Jianguo He
Antimicrobial peptides are components of the innate immune systems in animals and plants as natural defense against pathogens. Critical issues like manufacturing costs have to be addressed before mass production of these peptides for agriculture or community sterilizations. Here, we report a cost-effective chemical synthesis method to produce antimicrobial cocktails, which was based on the heat conjugation of amino acids in the presence of phosphoric acid and plant oil at 150 °C. The conjugates showed potent biological activities against all tested bacteria including a multi-drug resistant Staphylococcus aureus strain Y5 and ampicillin resistant Pseudomonas aerugenosa ATCC9027 strain, demonstrating potential in agriculture, and prophylactic applications in hospital and community settings...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28882013/antimicrobial-management-in-nosocomial-peritonitis-microbiota-drug-and-time
#16
REVIEW
A Montero, P Salgado Aranda, F Gilsanz, E Maseda
Complicated intra-abdominal infection requires surgical treatment and broad-spectrum empiric antibiotic treatment used early. The rapid spread of multidrug-resistant bacteria has become a serious threat, especially in critical care units. The excessive use of carbapenems has led to carbapenemase-producing Enterobacteriaceae, leaving tigecycline and colistin as therapeutical options. The new antimicrobials, ceftazidime-avibactam and ceftolozane-tazobactam open new horizons in the treatment of multi-drug resistant Enterobacteriaceae...
September 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28881515/-characteristics-of-epidemiology-and-antimicrobial-resistance-of-gram-negative-bacterial-bloodstream-infections-in-children
#17
L Dong, X Y Zhang, C C Li, Z Li, Y Q Xia
Objective: To study the epidemiology and antimicrobial resistance of Gram-negative bacterial bloodstream infections in children, and to guide the choice of antimicrobials and the control of nosocomial infection. Method: Clinical data, bacteriology and antimicrobial susceptibility test results were collected retrospectively in hospitalized children who were diagnosed with gram-negative bacterial bloodstream infections in Yuying Children's Hospital of Wenzhou Medical University from January, 2010 to December, 2015...
September 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
https://www.readbyqxmd.com/read/28870696/in%C3%A2-vitro-study-of-virulence-potential-of-acinetobacter-baumannii-outer-membrane-vesicles
#18
Chandana Jha, Sujata Ghosh, Vikas Gautam, Pankaj Malhotra, Pallab Ray
Acinetobacter baumannii has emerged as an important opportunistic pathogen mostly causing nosocomial infections. The virulence factors of this important pathogen are largely unknown. Outer membrane vesicles (OMV) are naturally secreted by many gram negative and gram positive bacteria. These vesicles contain outer membrane proteins, lipids, periplasmic proteins, DNA and RNA. Their role in intracellular and intercellular signaling, transfer of virulence factors and eliciting immune response in host cells has been established in many pathogens...
September 1, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28869082/development-of-botanicals-to-combat-antibiotic-resistance
#19
REVIEW
Pooja D Gupta, Tannaz J Birdi
The discovery of antibiotics in the previous century lead to reduction in mortality and morbidity due to infectious diseases but their inappropriate and irrational use has resulted in emergence of resistant microbial populations. Alteration of target sites, active efflux of drugs and enzymatic degradations are the strategies employed by the pathogenic bacteria to develop intrinsic resistance to antibiotics. This has led to an increased interest in medicinal plants since 25-50% of current pharmaceuticals are plant derived...
August 30, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/28867242/can-microbial-cells-develop-resistance-to-oxidative-stress-in-antimicrobial-photodynamic-inactivation
#20
Nasim Kashef, Michael R Hamblin
Infections have been a major cause of disease throughout the history of humans on earth. With the introduction of antibiotics, it was thought that infections had been conquered. However, bacteria have been able to develop resistance to antibiotics at an exponentially increasing rate. The growing threat from multi-drug resistant organisms calls for intensive action to prevent the emergence of totally resistant and untreatable infections. Novel, non-invasive, non-antibiotic strategies are needed that act more efficiently and faster than current antibiotics...
March 2017: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
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