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Multidrug-resistant Organism

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https://www.readbyqxmd.com/read/29791488/comparison-of-the-validity-of-smear-and-culture-conversion-as-a-prognostic-marker-of-treatment-outcome-in-patients-with-multidrug-resistant-tuberculosis
#1
Kefyalew Addis Alene, Kerri Viney, Hengzhong Yi, Emma S McBryde, Kunyun Yang, Liqiong Bai, Darren J Gray, Zuhui Xu, Archie C A Clements
BACKGROUND: The World Health Organization (WHO) has conditionally recommended the use of sputum smear microscopy and culture examination for the monitoring of multidrug-resistant tuberculosis (MDR-TB) treatment. We aimed to assess and compare the validity of smear and culture conversion at different time points during treatment for MDR-TB, as a prognostic marker for end-of-treatment outcomes. METHODS: We undertook a retrospective observational cohort study using data obtained from Hunan Chest Hospital, China and Gondar University Hospital, Ethiopia...
2018: PloS One
https://www.readbyqxmd.com/read/29788125/toxin-antitoxin-systems-and-regulatory-mechanisms-in-mycobacterium-tuberculosis
#2
Richard A Slayden, Clinton C Dawson, Jason E Cummings
There has been a significant reduction in annual tuberculosis incidence since the World Health Organization declared tuberculosis a global health threat. However, treatment of M. tuberculosis infections requires lengthy multidrug therapeutic regimens to achieve a durable cure. The development of new drugs that are active against resistant strains and phenotypically diverse organisms continues to present the greatest challenge in the future. Numerous phylogenomic analyses have revealed that the Mtb genome encodes a significantly expanded repertoire of toxin-antitoxin (TA) loci that makes up the Mtb TA system...
June 1, 2018: Pathogens and Disease
https://www.readbyqxmd.com/read/29784578/quantitative-study-about-the-role-of-environmental-conditions-in-the-survival-capability-of-multidrug-resistant-bacteria
#3
Adrienn Hanczvikkel, Ákos Tóth
BACKGROUND: Healthcare-associated infections (HAIs) caused by multidrug-resistant bacteria (MDRB) are of global concern and hospital textiles can contribute to their transmission. MDRB are able to survive on textiles for more than enough time to spread in the environment. Some studies summarized the effect of environmental factors on the duration of bacterial survival, but it remained an open question how these factors influence the quantity of surviving bacteria in a period of a few days, which is relevant from the perspective of HAIs...
May 18, 2018: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/29784062/multidrug-resistant-proteus-mirabilis-and-escherichia-coli-causing-fulminant-necrotising-fasciitis-a-case-report
#4
Eugene Vernyuy Yeika, Joyce Bei Foryoung, Derrick Tembi Efie, Eugene Adze Nkwetateba, Paul Nkemtendong Tolefac, Marcelin Ngowe Ngowe
BACKGROUND: Necrotizing fasciitis is a rare soft tissue infection characterized by rapid progressive necrosis with relative sparing of underlying muscles. This case is reported to highlight the emergence of multidrug resistant microbes in recent days which limits the use of empiric antibiotic therapy and necessitates early cultures and sensitivity enabling targeted antibiotic therapy. Factors that lead to antimicrobial resistance especially in sub-Saharan Africa have also been discussed...
May 21, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29779717/the-design-and-evaluation-of-an-antimicrobial-resistance-surveillance-system-for-neonatal-intensive-care-units-in-iran
#5
Peyman Rezaei-Hachesu, Taha Samad-Soltani, Sajad Yaghoubi, Marjan GhaziSaeedi, Kayvan Mirnia, Hossein Masoumi-Asl, Reza Safdari
INTRODUCTION: Neonatal intensive care units (NICUs) have complex patients in terms of their diagnoses and required treatments. Antimicrobial treatment is a common therapy for patients in NICUs. To solve problems pertaining to empirical therapy, antimicrobial stewardship programs have recently been introduced. Despite the success of these programs in terms of data collection, there is still inefficiency in terms of analyzing and reporting the data. Thus, to successfully implement these stewardship programs, the design of antimicrobial resistance (AMR) surveillance systems is recommended as a first step...
July 2018: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/29776929/antibacterial-effects-of-phage-lysin-lysgh15-on-planktonic-cells-and-biofilms-of-diverse-staphylococci
#6
Yufeng Zhang, Mengjun Cheng, Hao Zhang, Jiaxin Dai, Zhimin Guo, Xinwei Li, Yalu Ji, Ruopeng Cai, Hengyu Xi, Xinwu Wang, Yibing Xue, Changjiang Sun, Xin Feng, Liancheng Lei, Wenyu Han, Jingmin Gu
Treatment of infections caused by staphylococci has become more difficult because of the emergence of multidrug-resistant strains as well as biofilm formation. In this study, we observed the ability of the phage lysin LysGH15 to eliminate staphylococcal planktonic cells and biofilms formed by Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus haemolyticus and Staphylococcus hominis All these strains were sensitive to LysGH15, showing reductions in bacterial counts of approximately 4 log units within 30 min after treatment with 20 μg/mL LysGH15, and the minimum inhibitory concentrations (MICs) ranged from 8 μg/mL to 32 μg/mL...
May 18, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29770096/canadian-recommendations-for-laboratory-interpretation-of-multiple-or-extensive-drug-resistance-in-clinical-isolates-of-enterobacteriaceae-acinetobacter-species-and-pseudomonas-aeruginosa
#7
G J German, M Gilmour, G Tipples, H J Adam, H Almohri, J Bullard, T Dingle, D Farrell, G Girouard, D Haldane, L Hoang, P N Levett, R Melano, J Minion, R Needle, S N Patel, R Rennie, R C Reyes, J Longtin, M R Mulvey
The goal of this document was to provide Canadian laboratories with a framework for consistent reporting and monitoring of multidrug resistant organisms (MDRO) and extensively drug resistant organisms (XDRO) for common gram-negative pathogens. This is the final edition of the interim recommendations, which were modified after one year of broad consultative review. This edition represents a consensus of peer-reviewed information and was co-authored by the Canadian Public Health Laboratory Network and the Canadian Association of Clinical Microbiology and Infectious Diseases...
January 4, 2018: Canada Communicable Disease Report, Relevé des Maladies Transmissibles Au Canada
https://www.readbyqxmd.com/read/29770082/first-reported-case-of-multidrug-resistant-candida-auris-in-canada
#8
I S Schwartz, G W Hammond
Candida auris is a fungal pathogen that has recently emerged as a global threat to public health. It was first described in Japan in 2009 and has since been reported in 17 countries on five continents. This case report describes the first reported case of multidrug-resistant C. auris in Canada. In May 2017, a 64-year-old individual was evaluated for chronic otitis externa. Past medical history included a recent hospitalization in India for elective oral surgery that was complicated by an odontogenic brain abscess...
July 6, 2017: Canada Communicable Disease Report, Relevé des Maladies Transmissibles Au Canada
https://www.readbyqxmd.com/read/29763729/in-silico-identification-of-molecular-mimics-involved-in-the-pathogenesis-of-clostridium-botulinum-atcc-3502-strain
#9
Tulika Bhardwaj, Shafiul Haque, Pallavi Somvanshi
Bacterial pathogens invade and disrupt the host defense system by means of protein sequences structurally similar at global and local level both. The sharing of homologous sequences between the host and the pathogenic bacteria mediates the infection and defines the concept of molecular mimicry. In this study, various computational approaches were employed to elucidate the pathogenicity of Clostridium at genome-wide level. Genome-wide study revealed that the pathogen mimics the host (Homo sapiens) and unraveled the complex pathogenic pathway of causing infections...
May 12, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29759641/impact-of-antimicrobial-wipes-compared-with-hypochlorite-solution-on-environmental-surface-contamination-in-a-health-care-setting-a-double-crossover-study
#10
Harsha Siani, Rebecca Wesgate, Jean-Yves Maillard
OBJECTIVE: Antimicrobial wipes are increasingly used in health care settings. This study evaluates, in a clinical setting, the efficacy of sporicidal wipes versus a cloth soaked in a 1,000 ppm chlorine solution. INTERVENTION: A double-crossover study was performed on 2 different surgical and cardiovascular wards in a 1,000-bed teaching hospital over 29 weeks. The intervention period that consisted of surface decontamination with the preimpregnated wipe or cloth soaked in chlorine followed a 5-week baseline assessment of microbial bioburden on surfaces...
May 11, 2018: American Journal of Infection Control
https://www.readbyqxmd.com/read/29755420/characterization-of-two-novel-bacteriophages-infecting-multidrug-resistant-mdr-acinetobacter-baumannii-and-evaluation-of-their-therapeutic-efficacy-in-vivo
#11
Kyoungeun Cha, Hynu K Oh, Jae Y Jang, Yunyeol Jo, Won K Kim, Geon U Ha, Kwan S Ko, Heejoon Myung
Acinetobacter baumannii is emerging as a challenging nosocomial pathogen due to its rapid evolution of antibiotic resistance. We report characterization of two novel bacteriophages, PBAB08 and PBAB25, infecting clinically isolated, multidrug-resistant (MDR) A. baumannii strains. Both phages belonged to Myoviridae of Caudovirales as their morphology observed under an electron microscope. Their genomes were double stranded linear DNAs of 42,312 base pairs and 40,260 base pairs, respectively. The two phages were distinct from known Acinetobacter phages when whole genome sequences were compared...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29753159/defining-incidence-and-risk-factors-for-catheter-associated-bloodstream-infections-in-an-outpatient-adult-hematopoietic-cell-transplant-program
#12
Marissa K McDonald, Kathryn A Culos, Katie S Gatwood, Caleb Prow, Heidi Chen, Bipin N Savani, Michael Byrne, Adetola A Kassim, Brian G Engelhardt, Madan Jagasia, Gowri Satyanarayana
BACKGROUND: Allogeneic hematopoietic cell transplant (HCT) patients are at an increased risk of developing central line-associated bloodstream infections (CLABSIs) due to prolonged periods of myelosuppression, immunosuppression, and indwelling catheter days. CLABSIs are among the most serious complications in HCT recipients and can lead to prolonged hospitalizations, intensive care unit (ICU) admissions, lengthy antimicrobial therapies, and increased mortality. There is a lack of data regarding the incidence and risk factors associated with the development of CLABSIs in the HCT population undergoing outpatient transplantation...
May 9, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29749387/invasive-candidiasis
#13
REVIEW
Peter G Pappas, Michail S Lionakis, Maiken Cavling Arendrup, Luis Ostrosky-Zeichner, Bart Jan Kullberg
Invasive candidiasis is an important health-care-associated fungal infection that can be caused by several Candida spp.; the most common species is Candida albicans, but the prevalence of these organisms varies considerably depending on geographical location. The spectrum of disease of invasive candidiasis ranges from minimally symptomatic candidaemia to fulminant sepsis with an associated mortality exceeding 70%. Candida spp. are common commensal organisms in the skin and gut microbiota, and disruptions in the cutaneous and gastrointestinal barriers (for example, owing to gastrointestinal perforation) promote invasive disease...
May 11, 2018: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/29740543/quorum-sensing-signaling-and-quenching-in-the-multidrug-resistant-pathogen-stenotrophomonas-maltophilia
#14
REVIEW
Pol Huedo, Xavier Coves, Xavier Daura, Isidre Gibert, Daniel Yero
Stenotrophomonas maltophilia is an opportunistic Gram-negative pathogen with increasing incidence in clinical settings. The most critical aspect of S. maltophilia is its frequent resistance to a majority of the antibiotics of clinical use. Quorum Sensing (QS) systems coordinate bacterial populations and act as major regulatory mechanisms of pathogenesis in both pure cultures and poly-microbial communities. Disruption of QS systems, a phenomenon known as Quorum Quenching (QQ), represents a new promising paradigm for the design of novel antimicrobial strategies...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29738843/transporter-dependent-cytotoxicity-of-antiviral-drugs-in-primary-cultures-of-human-proximal-tubular-cells
#15
Lawrence H Lash, Caroline A Lee, Clynn Wilker, Vishal Shah
The role of plasma membrane transporters in the nephrotoxicity of two antiretroviral drugs, cidofovir and tenofovir, was studied in primary cultures of human proximal tubular (hPT) cells. Cells were grown on Transwell filter inserts to maintain epithelial polarity and access to either the apical or basolateral plasma membrane. The function of relevant membrane transporters, organic anion transporter 1 and 3 (OAT1/3), P-glycoprotein (multidrug resistance protein-1; P-gp or MDR1), and organic cation transporter 2 (OCT2), was validated by measurements of apical-to-basolateral and basolateral-to-apical fluxes of furosemide, digoxin, and metformin, respectively...
May 5, 2018: Toxicology
https://www.readbyqxmd.com/read/29735827/molecular-characterisation-for-clonality-and-transmission-dynamics-of-an-outbreak-of-klebsiella-pneumoniae-amongst-neonates-in-a-tertiary-care-centre-in-south-india
#16
Chaitra Shankar, Manish Kumar, Ashtawarthani Baskaran, Miracle Magdelene Paul, Nithya Ponmudi, Sridhar Santhanam, Joy Sarojini Michael, Balaji Veeraraghavan
Purpose: Sepsis is a significant cause of morbidity and mortality amongst neonates. Klebsiella pneumoniae is a common cause of nosocomial outbreaks causing bacteraemia and having potential of acquiring plasmids enhancing antimicrobial resistance. In the present study, we investigate K. pneumoniae outbreak causing bacteraemia amongst neonates over a span of 2 months. Isolates were characterised for antimicrobial resistance, virulence, molecular typing for clonality and plasmid typing for transmission dynamics, and patient outcome was investigated...
January 2018: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/29734778/antibiotic-sensitivity-profiling-and-virulence-potential-of-campylobacter-jejuni-isolates-from-estuarine-water-in-the-eastern-cape-province-south-africa
#17
Anthony C Otigbu, Anna M Clarke, Justine Fri, Emmanuel O Akanbi, Henry A Njom
Campylobacter jejuni (CJ) is a zoonotic microbe and a major causative organism of diarrheal infection in humans that often has its functional characteristics inactivated in stressed conditions. The current study assessed the correlation between recovered CJ and water quality parameters and the drug sensitivity patterns of the pathogen to frontline antibiotics in human and veterinary medicine. Water samples ( n = 244) from rivers/estuarines were collected from April⁻September 2016, and physicochemical conditions were recorded on-site...
May 6, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29731643/ugly-bugs-in-healthy-guts-carriage-of-multidrug-resistant-and-esbl-producing-commensal-enterobacteriaceae-in-the-intestine-of-healthy-nepalese-adults
#18
Anjila Maharjan, Anjeela Bhetwal, Shreena Shakya, Deepa Satyal, Shashikala Shah, Govardhan Joshi, Puspa Raj Khanal, Narayan Prasad Parajuli
Background: Fecal carriage of multidrug-resistant and extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae is one of the important risk factors for infection with antibiotic-resistant bacteria. In this report, we examined the prevalence of multidrug-resistant and ESBL-producing common enterobacterial strains colonizing the intestinal tract of apparently healthy adults in Kathmandu, Nepal. Methods: During a 6-month period (February-July 2016), a total of 510 stool specimens were obtained from apparently healthy students of Manmohan Memorial Institute of Health Sciences, Kathmandu, Nepal...
2018: Infection and Drug Resistance
https://www.readbyqxmd.com/read/29728063/antibiotic-prescribing-behavior-among-general-practitioners-a-questionnaire-based-study-in-germany
#19
Florian Salm, Sandra Schneider, Katja Schmücker, Inga Petruschke, Tobias S Kramer, Regina Hanke, Christin Schröder, Christoph Heintze, Ulrich Schwantes, Petra Gastmeier, Jochen Gensichen
BACKGROUND: This study investigates the barriers and facilitators of the use of antibiotics in acute respiratory tract infections by general practitioners (GPs) in Germany. METHODS: A multidisciplinary team designed and pre-tested a written questionnaire addressing the topics awareness of antimicrobial resistance (7 items), use of antibiotics (9 items), guidelines/sources of information (9 items) and sociodemographic factors (7 items), using a five-point-Likert-scale ("never" to "very often")...
May 4, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29719870/quantifying-the-evolutionary-conservation-of-genes-encoding-multidrug-efflux-pumps-in-the-eskape-pathogens-to-identify-antimicrobial-drug-targets
#20
Lauren E Brooks, Sabah Ul-Hasan, Benjamin K Chan, Mark J Sistrom
Increasing rates of antibiotic-resistant bacterial infection are one of the most pressing contemporary global health concerns. The ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) have been identified as the leading global cause of multidrug-resistant bacterial infections, and overexpression of multidrug efflux (MEX) transport systems has been identified as one of the most critical mechanisms facilitating the evolution of multidrug resistance in ESKAPE pathogens...
May 2018: MSystems
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