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https://www.readbyqxmd.com/read/27924410/does-antibiotic-resistance-evolve-in-hospitals
#1
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/27924179/ischemic-stroke-and-septic-shock-after-subacute-endocarditis-caused-by-haemophilus-parainfluenzae-case-report
#2
Mayra Goncalves Menegueti, Jaciara Machado-Viana, Gilberto Gambero Gaspar, Edson Antonio Nicolini, Anibal Basile-Filho, Maria Auxiliadora-Martins
Haemophilus parainfluenzae, which belongs to the HACEK (Haemophilus ssp, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella kingae) group, is a rare cause of subacute endocarditis and may lead to ischemic stroke. A 65-year-old female patient previously diagnosed with rheumatic valve disease was submitted to surgical mitral valve repair in 1996. Physical examination did not reveal any murmurs; physical examination of the lungs and abdomen was normal. The patient was admitted to hospital with progressive dyspnea, dry cough, and fever...
January 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/27922763/antimicrobial-resistance-in-nontyphoidal-salmonella-isolated-from-human-and-poultry-related-samples-in-brazil-20-year-meta-analysis
#3
Daiane Voss-Rech, Luciana Potter, Clarissa Silveira Luiz Vaz, Daniela Isabel Brayer Pereira, Luís Antonio Sangioni, Águeda Castagna Vargas, Sônia de Avila Botton
Nontyphoidal Salmonella are one of the leading causes of foodborne diseases in the world. As poultry products are recognized as main sources of human salmonellosis, nontyphoidal Salmonella control has become a global issue for the poultry industry. The increasing antimicrobial resistance in poultry-related nontyphoidal Salmonella serovars is a global matter of concern. By monitoring the evolution of antimicrobial resistance, alternative treatments can be identified and possible restrictions in the treatment of systemic human salmonellosis foreseen...
December 6, 2016: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/27921299/one-dose-per-day-compared-to-multiple-doses-per-day-of-gentamicin-for-treatment-of-suspected-or-proven-sepsis-in-neonates
#4
REVIEW
Shripada C Rao, Ravisha Srinivasjois, Kwi Moon
BACKGROUND: Animal studies and trials in older children and adults suggest that a 'one dose per day' regimen of gentamicin is superior to a 'multiple doses per day' regimen. OBJECTIVES: To compare the efficacy and safety of one dose per day compared to multiple doses per day of gentamicin in suspected or proven sepsis in neonates. SEARCH METHODS: Eligible studies were identified by searching the Cochrane Central Register of Controlled Trials (CENTRAL; 2016, Issue 3) in the Cochrane Library (searched 8 April 2016), MEDLINE (1966 to 8 April 2016), Embase (1980 to 8 April 2016), and CINAHL (December 1982 to 8 April 2016)...
December 6, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27920981/infective-endocarditis-and-sj%C3%A3-gren-s-syndrome-diagnosed-simultaneously
#5
Fujiko Morita, Yuji Hirai, Kiyozumi Suzuki, Yuki Uehara, Kazunori Mitsuhashi, Atsushi Amano, Toshio Naito
Poor dentition and/or dental infection due to insufficient oral care are presumed to be risk factors for infective endocarditis (IE). We present a case of endocarditis caused by Granulicatella adiacens and Sjögren's syndrome (SS) with oral complications diagnosed simultaneously. A 67-year-old woman was admitted to our hospital with fever, general fatigue, arthralgia, and back pain. She was diagnosed with primary SS according to the criteria of the American-European Consensus Group. Transthoracic echocardiography carried out to examine her persistent fever revealed vegetation formation (14 × 5 mm) on the aortic valve and her blood cultures were positive for G...
2017: IDCases
https://www.readbyqxmd.com/read/27920765/novel-pathways-for-ameliorating-the-fitness-cost-of-gentamicin-resistant-small-colony-variants
#6
Martin Vestergaard, Wilhelm Paulander, Bingfeng Leng, Jesper B Nielsen, Henrik T Westh, Hanne Ingmer
Small colony variants (SCVs) of the human pathogen Staphylococcus aureus are associated with persistent infections. Phenotypically, SCVs are characterized by slow growth and they can arise upon interruption of the electron transport chain that consequently reduce membrane potential and thereby limit uptake of aminoglycosides (e.g., gentamicin). In this study, we have examined the pathways by which the fitness cost of SCVs can be ameliorated. Five gentamicin resistant SCVs derived from S. aureus JE2 were independently selected on agar plates supplemented with gentamicin...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27920760/prevalence-of-the-antibiotic-resistance-genes-in-coagulase-positive-and-negative-staphylococcus-in-chicken-meat-retailed-to-consumers
#7
Kamelia Osman, Jihan Badr, Khalid S Al-Maary, Ihab M I Moussa, Ashgan M Hessain, Zeinab M S Amin Girah, Usama H Abo-Shama, Ahmed Orabi, Aalaa Saad
The use of antibiotics in farm management (growing crops and raising animals) has become a major area of concern. Its implications is the consequent emergence of antibiotic resistant bacteria (ARB) and accordingly their access into the human food chain with passage of antibiotic resistance genes (ARG) to the normal human intestinal microbiota and hence to other pathogenic bacteria causative human disease. Therefore, we pursued in this study to unravel the frequency and the quinolone resistance determining region, mecA and cfr genes of methicillin-susceptible Staphylococcus aureus (MSSA), methicillin-resistant S...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27917926/clonal-spread-of-mcr-1-in-pmqr-carrying-st34-salmonella-isolates-from-animals-in-china
#8
Xing-Ping Li, Liang-Xing Fang, Jia-Qi Song, Jing Xia, Wei Huo, Jin-Tao Fang, Xiao-Ping Liao, Ya-Hong Liu, Youjun Feng, Jian Sun
Since initial identification in China, the widespread geographical occurrence of plasmid-mediated colistin resistance gene mcr-1 in Enterobacteriaceae has been of great concern. In this study, a total of 22 Salmonella enterica were resistant to colistin, while only five isolates which belonged to ST34 Salmonella enterica serovar Typhimurium (S. Typhimurium) were mcr-1 positive. Four of them shared nearly identical PFGE type, although they were from different host species and diverse geographical locations. All the mcr-1-positive S...
December 5, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27916390/chromatographic-behavior-of-selected-antibiotic-drugs-supported-by-quantitative-structure-retention-relationships
#9
Malgorzata Szultka-Mlynska, Boguslaw Buszewski
As antibiotic drugs have a wide variety of applications, there is a growing demand for their selective determination, a task for which chromatographic methods seem to be appropriate. With this end in view, chromatographic measurements were performed with the use of six different HPLC columns (ACE 5C18, IAM.PC.DD.2, octadecyl, phenyl, alkylamide and cholesteryl-alkylamide) to determine the logkw of selected antibiotic drugs (amoxicillin, cefatoxime, ciprofloxacin, fluconazole, gentamicin, clindamycin, linezolid and metronidazole)...
November 29, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27914161/streptococcus-agalactiae-native-valve-endocarditis-uncommon-presentation-of-multiple-myeloma
#10
Ana Pinho Oliveira, Anne Delgado, Cláudia Martins, Pedro Gama
Adults with chronic immunosuppressive conditions are at an increased risk for Streptococcus agalactiae endocarditis, which is typically characterized by acute onset, presence of large vegetations, rapid valvular destruction and frequent complications. We report a rare case of a 74 years old man presenting with fever, renal infarction, ischemic stroke and uveitis. Infective endocarditis was diagnosed and Streptococcus agalactiae was isolated in blood cultures. A multiple myeloma Ig G-K was also diagnosed. The infective endocarditis was successfully treated with a course of benzylpenicillin and gentamicin...
August 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/27914126/effects-of-platelet-rich-plasma-on-kidney-regeneration-in-gentamicin-induced-nephrotoxicity
#11
Abbas Moghadam, Tahereh Talaei Khozani, Afsaneh Mafi, Mohammad Reza Namavar, Farzaneh Dehghani
Platelet-rich plasma (PRP) as a source of growth factors may induce tissue repairing and improve fibrosis. This study aimed to assess the effects of PRP on kidney regeneration and fibrosis in gentamicin (GM)-induced nephrotoxicity rat model by stereological study. Thirty-two male rats were selected. Nephrotoxicity was induced in animals by administration of GM (80 mg/kg/daily, intraperitoneally [IP], 8 day) and animals were treated by PRP (100 μL, intra-cortical injection using surgical microscopy, single dose)...
January 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/27912884/synergism-of-coumarins-from-the-chinese-drug-zanthoxylum-nitidum-with-antibacterial-agents-against-methicillin-resistant-staphylococcus-aureus-mrsa
#12
Guo-Ying Zuo, Chun-Juan Wang, Jun Han, Yu-Qing Li, Gen-Chun Wang
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) poses a serious therapeutic challenge in current clinic and new drug development. Natural coumarins have diverse bioactivities and the potential of resistance modifying effects. PURPOSE: This study is to present in-depth evaluations of in vitro antimicrobial activities of four natural coumarins 5-geranyloxy-7-methoxycoumarin (Gm, 1), (5,7-dimethoxy-8-prenyloxycoumarin (artanin, Ar, 2)), isopimpinellin (Is, 3) and phellopterin (Ph, 4) from Zanthoxylum nitidum (Roxb...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27912877/riceberry-bran-extract-prevents-renal-dysfunction-and-impaired-renal-organic-anion-transporter-3-oat3-function-by-modulating-the-pkc-nrf2-pathway-in-gentamicin-induced-nephrotoxicity-in-rats
#13
Phatchawan Arjinajarn, Anchalee Pongchaidecha, Nuttawud Chueakula, Krit Jaikumkao, Varanuj Chatsudthipong, Sugunya Mahatheeranont, Orranuch Norkaew, Nipon Chattipakorn, Anusorn Lungkaphin
PURPOSE: This study investigated the protective effects of Riceberry bran extract (RBBE) on renal function, and the function and expression of renal organic anion transporter 3 (Oat3) in gentamicin-induced nephrotoxicity in rats and explored the mechanisms for its protective effects. MATERIAL AND METHODS: Male Sprague Dawley rats (n= 42) were divided into six groups to receive normal saline, gentamicin (100mg/kg), co-treatment of gentamicin and RBBE (at dose of 250, 500 and 1000mg/kg), and RBBE (at dose of 1000mg/kg) only, for consecutive fifteen days...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27912796/staphylococcal-species-heterogeneity-in-the-nasal-microbiome-following-antibiotic-prophylaxis-revealed-by-tuf-gene-deep-sequencing
#14
Claire L McMurray, Katherine J Hardy, Szymon T Calus, Nicholas J Loman, Peter M Hawkey
BACKGROUND: Staphylococci are a major constituent of the nasal microbiome and a frequent cause of hospital-acquired infection. Antibiotic surgical prophylaxis is administered prior to surgery to reduce a patient's risk of postoperative infection. The impact of surgical prophylaxis on the nasal staphylococcal microbiome is largely unknown. Here, we report the species present in the nasal staphylococcal microbiome and the impact of surgical prophylaxis revealed by a novel culture independent technique...
December 2, 2016: Microbiome
https://www.readbyqxmd.com/read/27909433/sponge-microbiota-are-a-reservoir-of-functional-antibiotic-resistance-genes
#15
Dennis Versluis, Mari Rodriguez de Evgrafov, Morten O A Sommer, Detmer Sipkema, Hauke Smidt, Mark W J van Passel
Wide application of antibiotics has contributed to the evolution of multi-drug resistant human pathogens, resulting in poorer treatment outcomes for infections. In the marine environment, seawater samples have been investigated as a resistance reservoir; however, no studies have methodically examined sponges as a reservoir of antibiotic resistance. Sponges could be important in this respect because they often contain diverse microbial communities that have the capacity to produce bioactive metabolites. Here, we applied functional metagenomics to study the presence and diversity of functional resistance genes in the sponges Aplysina aerophoba, Petrosia ficiformis, and Corticium candelabrum...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27904601/evaluation-effects-of-nebulized-gentamicin-in-exacerbation-of-chronic-obstructive-lung-disease
#16
Forogh Soltaninejad, Soleiman Kheiri, Roya Habibian, Arshia Amra, Shahin Asgari-Savadjani
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is a major cause of chronic morbidity and mortality throughout the world. Exacerbation of COPD has negative effect on quality of life. Therapeutic effect of nebulized antibiotics in pulmonary infections has been reported previously. Hence, we evaluated the effect of nebulized gentamicin in acute exacerbation of COPD (AECOPD). MATERIALS AND METHODS: In this clinical trial study, 86 hospitalized patients with AECOPD were divided into two groups for using nebulized gentamicin twice daily (case group) and placebo (control group) for 5 days in addition to standard treatment...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27904224/estimation-of-drug-absorption-in-antibiotic-soaked-bone-grafts
#17
Manish Ramesh Shah, Rukesh R Patel, Randhirsinh V Solanki, Shailendra H Gupta
INTRODUCTION: There is paucity of literature about antibiotic uptake in bone grafts soaked in antibiotic solutions at room temperature in the operation theatre. We hypothesized that if bone grafts are dipped in different strengths of antibiotic solutions for sufficient period, their utilization at the target site helps in localized release of antibiotics in adequate inhibitory concentration to achieve the bacterial regression. The purpose of the study was to find out: (1) Optimum duration, strength, and volume of antibiotic solution required for dipping bone grafts at room temperature prior to the use...
November 2016: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/27902427/phenotypic-and-genetic-characterization-of-multi-drug-resistant-staphylococcus-aureus-in-the-tropics-of-southeast-asia
#18
Siti Norayuni Mohd Zulkeflle, Yus Amira Yusaimi, Norio Sugiura, Koji Iwamoto, Masafumi Goto, Motoo Utsumi, Nor'azizi Bin Othman, Zuriati Zakaria, Hirofumi Hara
Antibiotic resistance has become a major public health problem throughout the world. The presence of antibiotic resistant bacteria such as Staphylococcus aureus (S. aureus) and antibiotic resistance genes (ARGs) in hospital wastewater is cause for great concern today. In this study, 276 S. aureus isolates were recovered from hospital wastewater samples in Malaysia. All of the isolates were screened for susceptibility to nine different classes of antibiotics: ampicillin (AMP), ciprofloxacin (CFX), gentamicin (GMN), kanamycin (KMN), erythromycin (ERM), vancomycin (VAN), trimetoprim and sulfamethaxazole (TM-SMZ), chloramphenicol (CMP), tetracycline (TET), and nalidixic acid (NAL)...
November 3, 2016: Microbiology
https://www.readbyqxmd.com/read/27902380/antimicrobial-resistance-profiling-and-molecular-typing-of-methicillin-resistant-staphylococcus-aureus-mrsa-isolated-from-a-malaysian-teaching-hospital
#19
Ainihayati Noordin, Hassriana Fazzila Sapri, Nurul Azirah Mohamad Sani, Shih Kei Leong, Xin-Ee Tan, Toh Leong Tan, Noraziah Mohamad Zin, Hui-Min Neoh, Salasawati Hussin
The annual prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in Malaysia has been estimated to be at 30-40% of all S. aureus infections. Nevertheless, data on the antimicrobial resistance and genetic diversity of Malaysian MRSAs remain few. In 2009, we collected 318 MRSA strains from various wards of our teaching hospital located in Kuala Lumpur, the capital city of Malaysia, and performed antimicrobial susceptibility testing on the strains. The strains were then molecularly characterized via SCCmec and virulence gene (cna, sea, seb, sec, sed, see, seg, seh, sei, eta, etb, PVL and TSST-1) typing; a subset of 49 strains isolated from the Intensive Care Unit (ICU) were also typed using Pulsed-Field Gel Electrophoresis (PFGE)...
November 7, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27900889/campylobacter-jejuni-strains-coresistant-to-tetracycline-and-ciprofloxacin-in-patients-with-gastroenteritis-in-croatia
#20
Merica Carev, Ana Kovačić, Anita Novak, Marija Tonkić, Ana Jerončić
BACKGROUND: Antibiotic-resistant Campylobacter jejuni strains are rapidly emerging worldwide. Here, we aimed to determine the antibiotic-resistance patterns and genetic structure of C. jejuni from stool samples of symptomatic patients in Dalmatia, the largest Croatian county. METHODS: In a population-based laboratory surveillance programme for campylobacteriosis in Dalmatia from May 2012 to May 2013, C. jejuni (n = 76) were collected from stool samples of all the patients hospitalized with gastroenteritis and matched positive outpatients (n = 77)...
November 30, 2016: Infectious Diseases
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