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Nosocomial infections

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https://www.readbyqxmd.com/read/28917968/the-effect-of-fennel-essential-oil-in-combination-with-antibiotics-on-staphylococcus-aureus-strains-isolated-from-carriers
#1
Paweł Kwiatkowski, Magdalena Mnichowska-Polanowska, Agata Pruss, Helena Masiuk, Małgorzata Dzięcioł, Stefania Giedrys-Kalemba, Monika Sienkiewicz
An increase in the number of staphylococcal infections and carriers among medical staff has forced us to seek more and more effective antibacterial agents. Bacteria from the Staphylococcus genus possessing different mechanisms of resistance are the cause of nosocomial infections. The objective of our investigations was susceptibility of S. aureus strains isolated from nasal vestibule of medical students to fennel essential oil. The GC-MS analysis of fennel essential oil revealed eleven constituents among which a majority of trans-anethole (80%) was found...
September 13, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28915364/nosocomial-multidrug-resistant-klebsiella-pneumoniae-strains-isolated-from-mexico-city-produce-robust-biofilms-on-abiotic-surfaces-but-not-on-human-lung-cells
#2
Martha Lorena Ostria-Hernandez, Karla Cecilia Juárez-de la Rosa, Patricia Arzate-Barbosa, Antonino Lara-Hernández, Fuminori Sakai, J Antonio Ibarra, Graciela Castro-Escarpulli, Jorge E Vidal
BACKGROUND: Klebsiella pneumoniae (Kpn) strains are a leading cause of hospital-acquired infections, including ventilator-associated pneumonia. Resistance to antibiotics, biofilm formation, and the production of certain fimbriae play an important role in the pathogenesis. AIM: We investigated the genetic relatedness, antibiotic resistance, virulence potential, and ability to form biofilms of Kpn strains isolated from hospital-acquired infections (n = 76). Strains were isolated at three major hospitals serving the largest metropolitan urban area in Mexico City, Mexico...
September 15, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28913903/acinetobacter-baumannii-isolated-from-hospital-acquired-infection-biofilm-production-and-drug-susceptibility
#3
Paweł Krzyściak, Agnieszka Chmielarczyk, Monika Pobiega, Dorota Romaniszyn, Jadwiga Wójkowska-Mach
Acinetobacter baumannii cause opportunistic nosocomial infections and is often multidrug resistant. It has ability to form biofilm. The possession of drug resistance mechanism and ability of biofilm formation seems to be the different way to enhancement of viability in stressful environment. In this study, we evaluate relation between these two factors. The biofilm formation was investigated in M63 medium with casein in microtiter plates, and the drug susceptibility was performed by disk diffusion methods. We found that 80-98% strains formed a biofilm...
September 15, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28912539/diphenyleneiodonium-chloride-dpic-displays-broad-spectrum-bactericidal-activity
#4
Manitosh Pandey, Alok Kumar Singh, Ritesh Thakare, Sakshi Talwar, Pratiksha Karaulia, Arunava Dasgupta, Sidharth Chopra, Amit Kumar Pandey
Indiscriminate use of antibiotics globally has lead to an increase in emergence of drug-resistant pathogens under both nosocomial, as well as more worryingly, in community setting as well. Further, a decrease in the corporate interest and financial commitment has exerted increasing pressure on a rapidly dwindling antimicrobial drug discovery and developmental program. In this context, we have screened the Library of Pharmacologically Active Compounds (LOPAC, Sigma) against Staphylococcus aureus and Mycobacterium tuberculosis to identify potent novel antimicrobial molecules amongst non-antibiotic molecules...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28911852/molecular-epidemiology-and-the-resistance-and-virulence-properties-of-pseudomonas-aeruginosa-cross-colonization-clonal-isolates-in-the-non-outbreak-setting
#5
Pengwei Hu, Jiayi Chen, Yuhang Chen, Tao Zhou, Xin Xu, Xiaofang Pei
The molecular epidemiology of Pseudomonas aeruginosa cross-colonization isolates has received limited attention in the non-outbreak setting. Also the roles of P. aeruginosa resistance and virulence in cross-colonization need to be further studied. This study aims to launch a tracking investigation to determine the epidemiological relationship of P. aeruginosa clinical and environmental isolates, identify the cross-colonization routes, and characterize the resistance and virulence properties of clonal clusters and sporadic strains in the respiratory care wards of a tertiary care hospital...
September 11, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28910979/crispr-cas9-based-efficient-genome-editing-in-staphylococcus-aureus
#6
Qi Liu, Yu Jiang, Lei Shao, Ping Yang, Bingbing Sun, Sheng Yang, Daijie Chen
Staphylococcus aureus is an important pathogenic bacterium prevalent in nosocomial infections and associated with high morbidity and mortality rates, which arise from the significant pathogenicity and multi-drug resistance. However, the typical genetic manipulation tools used to explore the relevant molecular mechanisms of S. aureus have multiple limitations: leaving a scar in the genome, comparatively low gene-editing efficiency, and prolonged experimental period. Here, we present a single-plasmid based on the clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR-associated (Cas) system which allows rapid and efficient chromosomal manipulation in S...
September 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28906479/characterization-of-vb_saum-frusau02-a-twort-like-bacteriophage-isolated-from-a-therapeutic-phage-cocktail
#7
Katarzyna Leskinen, Henni Tuomala, Anu Wicklund, Jenni Horsma-Heikkinen, Pentti Kuusela, Mikael Skurnik, Saija Kiljunen
Staphylococcus aureus is a commensal and pathogenic bacterium that causes infections in humans and animals. It is a major cause of nosocomial infections worldwide. Due to increasing prevalence of multidrug resistance, alternative methods to eradicate the pathogen are necessary. In this respect, polyvalent staphylococcal myoviruses have been demonstrated to be excellent candidates for phage therapy. Here we present the characterization of the bacteriophage vB_SauM-fRuSau02 (fRuSau02) that was isolated from a commercial Staphylococcus bacteriophage cocktail produced by Microgen (Moscow, Russia)...
September 14, 2017: Viruses
https://www.readbyqxmd.com/read/28906399/characteristics-of-infection-and-its-impact-on-short-term-outcome-in-patients-with-acute-on-chronic-liver-failure
#8
Junjun Cai, Mengchen Zhang, Tao Han, Hui-Qing Jiang
Bacterial infections are an important cause of mortality in liver failure. However, the type of infection, predictors of infection, and their impact on outcomes in patients with acute-on-chronic liver failure (ACLF) are limited.A total of 389 patients with ACLF were admitted in this retrospective, corhort study. Once admitted, clinical data including first infection site, type (community-acquired, healthcare-associated, or nosocomial), and second infection occurrence during hospitalization were collected. The outcome was mortality within 90 days...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28904387/bacterial-distributions-and-prognosis-of-bloodstream-infections-in-patients-with-liver-cirrhosis
#9
Yangxin Xie, Bo Tu, Zhe Xu, Xin Zhang, Jingfeng Bi, Min Zhao, Weiwei Chen, Lei Shi, Peng Zhao, Chunmei Bao, Enqiang Qin, Dongping Xu
Bloodstream infections (BSIs) are a frequently observed complication in liver cirrhosis patients. This study aimed to investigate the microbiological characteristics and outcomes of BSIs in patients with liver cirrhosis. We retrospectively studied 852 patients with liver cirrhosis who developed a BSI. Patient outcome was evaluated using 30-day mortality and assessed using multivariate stepwise logistic regression analysis. Antibiotic sensitivity of the pathogens was tested. Gram-negative bacteria were responsible for 59...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28904185/thinking-beyond-the-common-candida-species-need-for-speciation-of-candida-due-to-the-emergence-of-multidrug-resistant-candida-auris
#10
Shawn R Lockhart, Brendan R Jackson, Snigdha Vallabhaneni, Luis Ostrosky-Zeichner, Peter G Pappas, Tom Chiller
Candida species are one of the leading causes of nosocomial infections. Because much of the treatment for Candida infections is empiric, some institutions do not identify Candida to species. With the worldwide emergence of the multidrug resistant species Candida auris, identification of Candida to species level has new clinical relevance. Species should be identified for invasive candidiasis isolates, and speciation can be considered for selected non-invasive isolates to improve detection of C. auris.
September 13, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28900357/five-year-microbiological-monitoring-of-wards-and-operating-theatres-in-southern-italy
#11
REVIEW
V La Fauci, C Genovese, A Facciolà, M A R Palamara, R Squeri
INTRODUCTION: Nosocomial infections are one of the greatest problems in public health. Several studies have highlighted the role played by the hospital environment as a possible source of transmission of nosocomial pathogens. METHODS: A five-year monitoring of bacterial contamination on healthcare workers hands, surfaces most closely in contact with inpatient wards, operating theatres and "at rest" and "in use" operating theatre air samples. For the samples, we used sterile swabs, contact slides, manual API, and automated VITEK systems for identification...
June 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28900356/humidifiers-for-oxygen-therapy-what-risk-for-reusable-and-disposable-devices
#12
REVIEW
V La Fauci, G B Costa, A Facciolà, A Conti, R Riso, R Squeri
INTRODUCTION: Nosocomial pneumonia accounts for the vast majority of healthcare-associated infections (HAI). Although numerous medical devices have been discussed as potential vehicles for microorganisms, very little is known about the role played by oxygen humidifiers as potential sources of nosocomial pathogens. The purpose of this research was to evaluate the safety of the reuse of humidifiers by analysing the rate of microbial contamination in reusable and disposable oxygen humidifiers used during therapy, and then discuss their potential role in the transmission of respiratory pathogens...
June 2017: Journal of Preventive Medicine and Hygiene
https://www.readbyqxmd.com/read/28899610/nosocomial-acquired-and-community-onset-clostridium-difficile-infection-at-an-academic-hospital-in-italy-epidemiology-recurrences-and-toxin-genes-distribution
#13
Valeria Visconti, Grazia Brunetti, Maria Rosaria Cuomo, Alessandra Giordano, Giammarco Raponi
Toxinogenic Clostridium difficile infection (CDI) is a leading cause of infectious diarrhea. In this retrospective cohort study the molecular epidemiology of hospital-acquired and community-associated CDI was investigated in patients admitted to a tertiary care hospital. CD in stools samples was revealed by a two steps diagnostic algorithm, firstly screening for positivity to GDH antigen and thereafter RT-PCR analysis. Increased CDI incidence was observed ranging from 1.70episodes/10000patient-days in the 1st year, to 2...
September 9, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28899399/a-comparison-of-blood-stream-infections-with-extended-spectrum-beta-lactamase-producing-and-non-producing-klebsiella-pneumoniae-in-pediatric-patients
#14
Sevgen Tanır Basaranoglu, Yasemin Ozsurekci, Kubra Aykac, Eda Karadag Oncel, Asiye Bıcakcigil, Banu Sancak, Ali Bulent Cengiz, Ates Kara, Mehmet Ceyhan
BACKGROUND: Rapid development and global spread of multidrug resistant Klebsiella pneumonia (K. pneumoniae) as a major cause of nosocomial infections is really remarkable. The aim of this study was to explore risk factors for health care associated blood stream infections (BSI) caused by ESBL-producing K. pneumoniae in children and analyze clinical outcomes. METHODS: A retrospective review of patients younger than 18 years-old with blood stream infection caused by K...
September 12, 2017: Italian Journal of Pediatrics
https://www.readbyqxmd.com/read/28895709/recombinant-tissue-plasminogen-activator-treatment-for-intracardiac-vegetation-in-a-very-low-birth-weight-infant
#15
Abdurrahman A Ozdemir
Developing treatment options have resulted in prolonged admission and increased bacterial and fungal nosocomial infections as well as improved survival in neonatal intensive care unit. Invasive fungal infections in newborns are associated with significant morbidity and mortality and can cause endorgan dissemination such as endocarditis, endophthalmitis, septic arthritis, obstructive nephropathy and meningitis. Endocarditis requires aggressive systemic antifungal therapy and sometimes surgical intervention in neonates...
October 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28894700/targeting-the-type-ii-secretion-system-development-optimization-and-validation-of-a-high-throughput-screen-for-the-identification-of-small-molecule-inhibitors
#16
Ursula Waack, Tanya L Johnson, Khalil Chedid, Chuanwu Xi, Lyle A Simmons, Harry L T Mobley, Maria Sandkvist
Nosocomial pathogens that develop multidrug resistance present an increasing problem for healthcare facilities. Due to its rapid rise in antibiotic resistance, Acinetobacter baumannii is one of the most concerning gram-negative species. A. baumannii typically infects immune compromised individuals resulting in a variety of outcomes, including pneumonia and bacteremia. Using a murine model for bacteremia, we have previously shown that the type II secretion system (T2SS) contributes to in vivo fitness of A. baumannii...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28894438/characterization-of-enterococcus-isolates-colonizing-the-intestinal-tract-of-intensive-care-unit-patients-receiving-selective-digestive-decontamination
#17
Teresita D J Bello Gonzalez, Phu Pham, Janetta Top, Rob J L Willems, Willem van Schaik, Mark W J van Passel, Hauke Smidt
Enterococci have emerged as important opportunistic pathogens in intensive care units (ICUs). In this study, enterococcal population size and Enterococcus isolates colonizing the intestinal tract of ICU patients receiving Selective Digestive Decontamination (SDD) were investigated. All nine patients included in the study showed substantial shifts in the enterococcal 16S rRNA gene copy number in the gut microbiota during the hospitalization period. Furthermore, 41 Enterococcus spp. strains were isolated and characterized from these patients at different time points during and after ICU hospitalization, including E...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28894400/a-combination-of-trimethoprim-sulfamethoxazole-and-ceftazidime-showed-good-in-vitro-activity-against-stenotrophomonas-maltophilia
#18
Nabilah Ismail, Zarifah Zam, Siti Asma Hassan, Zaidah Abdul Rahman
BACKGROUND: Stenotrophomonas maltophilia has emerged as an important nosocomial pathogen, capable of causing a wide spectrum of infections. Treatment is difficult because it is resistant to many antimicrobial agents, thus reducing the treatment options. The aims of this study were to describe the antimicrobial susceptibility patterns and synergistic effect of selected antimicrobial combinations against S. maltophilia isolates. METHODS: This was a descriptive cross-sectional study undertaken in the Hospital Universiti Sains Malaysia from April 2011 to March 2012...
March 2017: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28893775/a-nosocomial-outbreak-of-extensively-drug-resistant-xdr-acinetobacter-baumannii-isolates-containing-blaoxa-237-encoded-on-a-plasmid
#19
Andrea M Hujer, Paul G Higgins, Susan D Rudin, Genevieve L Buser, Steven H Marshall, Kyriaki Xanthopoulou, Harald Seifert, Laura J Rojas, T Nicholas Domitrovic, P Maureen Cassidy, Margaret C Cunningham, Robert Vega, Jon P Furuno, Christopher D Pfeiffer, Zintars G Beldavs, Meredith S Wright, Michael R Jacobs, Mark D Adams, Robert A Bonomo
Carbapenem antibiotics are among the mainstay for treating infections caused by Acinetobacter baumannii, especially in the Northwest United States where carbapenem resistant A. baumannii remain relatively rare. However, between June 2012 and October 2014, an outbreak of carbapenem-resistant A. baumannii occurred in 16 patients from 5 healthcare facilities in the state of Oregon. All isolates were defined as extensively-drug resistant (XDR). MLST revealed that the isolates belonged to sequence type 2 (international clone 2, IC2), and were greater than 95% similar by rep-PCR analysis...
September 11, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28893646/whole-genome-sequence-of-a-carbapenem-resistant-hypermucoviscous-klebsiella-pneumoniae-isolate-swu01-with-capsular-serotype-k47-that-belongs-to-st11-from-a-patient-in-china
#20
Luhua Zhang, Ying Li, Wei Shen, Guangxi Wang, Yingshun Zhou
OBJECTIVES: In recent years, Klebsiella pneumoniae is emerging as a leading cause of nosocomial infection due to the rapid prevalence of multidrug resistant strains, particularly the carbapenem resistant isolates. In this study, we completed the genome sequence of a carbapenem-resistant K. pneumoniae SWU01. METHODS: Antimicrobial susceptibilities and hypermucoviscous phenotype were determined by the disk diffusion method and a positive string test, respectively...
September 8, 2017: Journal of Global Antimicrobial Resistance
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