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https://www.readbyqxmd.com/read/28733718/antimicrobial-resistance-in-the-next-30%C3%A2-years-humankind-bugs-and-drugs-a-visionary-approach
#1
REVIEW
Matteo Bassetti, Garyphallia Poulakou, Etienne Ruppe, Emilio Bouza, Sebastian J Van Hal, Adrian Brink
PURPOSE: To describe the current standards of care and major recent advances with regard to antimicrobial resistance (AMR) and to give a prospective overview for the next 30 years in this field. METHODS: Review of medical literature and expert opinion were used in the development of this review. RESULTS: There is undoubtedly a large clinical and public health burden associated with AMR in ICU, but it is challenging to quantify the associated excess morbidity and mortality...
July 21, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28731269/biofilm-formation-and-antibiotic-resistance-in-klebsiella-pneumoniae-urinary-strains
#2
Claudia Vuotto, Francesca Longo, Chiara Pascolini, Gianfranco Donelli, Maria Pia Balice, Maria Francesca Libori, Valentina Tiracchia, Antonino Salvia, Pietro Emanuele Varaldo
AIMS: Multi-drug resistant Klebsiella pneumoniae has become a relevant healthcare-associated pathogen. Capsule, type 1 and 3 fimbriae (mrkA gene), type 2 quorum-sensing system (luxS), synthesis of D-galactan I (wbbM), LPS transport (wzm) and poly-beta-1,6-N-acetyl-D-glucosamine (pgaA) seem involved in K. pneumoniae biofilm. Non-enzymatic antibiotic resistance is related to non-expression or mutation of porins (OmpK35 and OmpK36), and efflux pump (acrB) over-expression. The aim of this study was to analyse some virulence factors of K...
July 21, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28729186/-tuberculosis-treatment-for-children-an-update
#3
María José Mellado Peña, Begoña Santiago García, Fernando Baquero-Artigao, David Moreno Pérez, Roi Piñeiro Pérez, Ana Méndez Echevarría, José Tomás Ramos Amador, David Gómez-Pastrana Durán, Antoni Noguera Julian
Tuberculosis (TB) is the most important infectious disease all over the world, with a high morbidity and mortality. Pediatric tuberculosis has been a neglected epidemic, due to the difficulties in assessing its global impact, reduced incidence and lower infectivity compared to adults. In 2015, the WHO reported 1 million cases of paediatric TB and 169,000 deaths. In Europe, the emergence of MDR TB is a major concern, representing 16% of the new diagnosis in Eastern Europe. In 2014, it was estimated that about 219,000 children were infected by MDR-TB-strains in Europe, and 2,120 developed the disease...
July 17, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28727774/inhibitors-of-mycobacterium-marinum-virulence-identified-in-a-dictyostelium-discoideum-host-model
#4
Hajer Ouertatani-Sakouhi, Sébastien Kicka, Gianpaolo Chiriano, Christopher F Harrison, Hubert Hilbi, Leonardo Scapozza, Thierry Soldati, Pierre Cosson
Tuberculosis remains one of the major threats to public health worldwide. Given the prevalence of multi drug resistance (MDR) in Mycobacterium tuberculosis strains, there is a strong need to develop new anti-mycobacterial drugs with modes of action distinct from classical antibiotics. Inhibitors of mycobacterial virulence might target new molecular processes and may represent a potential new therapeutic alternative. In this study, we used a Dictyostelium discoideum host model to assess virulence of Mycobacterium marinum and to identify compounds inhibiting mycobacterial virulence...
2017: PloS One
https://www.readbyqxmd.com/read/28724454/long-term-care-facility-ltcf-residents-colonized-with-multidrug-resistant-mdr-klebsiella-pneumoniae-lineages-frequently-causing-infections-in-portuguese-clinical-institutions
#5
Carla Rodrigues, Ana C Mendes, Filip Sima, Jan Bavlovič, Elisabete Machado, Ângela Novais, Luísa Peixe
No abstract text is available yet for this article.
July 20, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28720731/an-in-vitro-chicken-gut-model-demonstrates-transfer-of-a-multidrug-resistance-plasmid-from-salmonella-to-commensal-escherichia-coli
#6
Roderick M Card, Shaun A Cawthraw, Javier Nunez-Garcia, Richard J Ellis, Gemma Kay, Mark J Pallen, Martin J Woodward, Muna F Anjum
The chicken gastrointestinal tract is richly populated by commensal bacteria that fulfill various beneficial roles for the host, including helping to resist colonization by pathogens. It can also facilitate the conjugative transfer of multidrug resistance (MDR) plasmids between commensal and pathogenic bacteria which is a significant public and animal health concern as it may affect our ability to treat bacterial infections. We used an in vitro chemostat system to approximate the chicken cecal microbiota, simulate colonization by an MDR Salmonella pathogen, and examine the dynamics of transfer of its MDR plasmid harboring several genes, including the extended-spectrum beta-lactamase blaCTX-M1 We also evaluated the impact of cefotaxime administration on plasmid transfer and microbial diversity...
July 18, 2017: MBio
https://www.readbyqxmd.com/read/28719657/isolation-and-in-vitro-evaluation-of-bacteriophages-against-mdr-bacterial-isolates-from-septic-wound-infections
#7
Roja Rani Pallavali, Vijaya Lakshmi Degati, Dakshayani Lomada, Madhava C Reddy, Vijaya Raghava Prasad Durbaka
Multi-drug resistance has become a major problem for the treatment of pathogenic bacterial infections. The use of bacteriophages is an attractive approach to overcome the problem of drug resistance in several pathogens that cause fatal diseases. Our study aimed to isolate multi drug resistant bacteria from patients with septic wounds and then isolate and apply bacteriophages in vitro as alternative therapeutic agents. Pus samples were aseptically collected from Rajiv Gandhi Institute of Medical Science (RIMS), Kadapa, A...
2017: PloS One
https://www.readbyqxmd.com/read/28719354/thymol-and-carvacrol-strongly-inhibit-biofilm-formation-and-growth-of-carbapenemase-producing-gram-negative-bacilli
#8
P Raei, T Pourlak, M Y Memar, N Alizadeh, M Aghamali, E Zeinalzadeh, M Asgharzadeh, H S Kafil
Discovery of novel drugs with new mechanisms of action and without cross-reaction with current therapeutic agents is crucial in the management of infections caused by multi-drug resistant (MDR) bacteria. The aim of the present study was to investigate effects of carvacrol and thymol on biofilm formation and antimicrobial activity against different carbapenemase-producing Gram negative bacilli. The antimicrobial and antibiofilm effect of thymol and carvacrol was investigated against strains harboring different genes related to carbapenemase resistance...
May 20, 2017: Cellular and Molecular Biology
https://www.readbyqxmd.com/read/28716451/multidrug-resistant-pseudomonas-aeruginosa-lower-respiratory-tract-infections-in-the-intensive-care-unit-prevalence-and-risk-factors
#9
Trang D Trinh, Evan J Zasowski, Kimberly C Claeys, Abdalhamid M Lagnf, Shravya Kidambi, Susan L Davis, Michael J Rybak
Intensive care unit (ICU) admission is a risk for multidrug-resistant (MDR) Pseudomonas aeruginosa, but factors specific to critically ill pneumonia patients are not fully characterized. Objective was to determine risk factors associated with MDR P. aeruginosa pneumonia among ICU patients. This was a retrospective case-control study of P. aeruginosa pneumonia in the ICU; cystic fibrosis and colonizers were excluded. Risk factors included comorbid conditions and prior healthcare exposure (anti-pseudomonal antibiotics, hospitalizations, nursing home, P...
June 19, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28716109/clinical-characteristics-and-outcomes-of-pseudomonas-aeruginosa-bacteremia-in-febrile-neutropenic-children-and-adolescents-with-the-impact-of-antibiotic-resistance-a-retrospective-study
#10
Hyo Sup Kim, Bo Kyoung Park, Seong Koo Kim, Seung Beom Han, Jae Wook Lee, Dong-Gun Lee, Nack-Gyun Chung, Bin Cho, Dae Chul Jeong, Jin Han Kang
BACKGROUND: Although the proportion of Pseudomonas aeruginosa infections has reduced after the introduction of antibiotics with anti-pseudomonal effects, P. aeruginosa bacteremia still causes high mortality in immunocompromised patients. This study determined the clinical characteristics and outcomes of P. aeruginosa bacteremia and the antibiotic susceptibilities of strains isolated from febrile neutropenic patients. METHODS: Thirty-one febrile neutropenic children and adolescents with underlying hematologic/oncologic disorders diagnosed with P...
July 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28712104/do-bacteria-isolated-from-icu-patients-eskape-antibiotic-treatment-in-vitro-susceptibility-of-the-enterobacteriaceae-family-to-tigecycline
#11
Katarzyna Talaga-Ćwiertnia, Paweł Krzyściak, Małgorzata Bulanda
BACKGROUND: Enterobacteriaceae are currently causing the majority of healthcare-associated infections (HAI) and simultaneously expressing increasing levels of antibiotic resistance. The purpose of this study is to assess the in vitro sensitivity of MDR strains from the family Enterobacteriaceae to tigecycline in relation to their origin from patients hospitalized in intensive care units (ICUs) and non-ICUs. METHODS: The study involved 156 clinically-significant strains of the Enterobacteriaceae family isolated from patients with cIAIs and/or cSSSIs hospitalized in ICUs and other surgical departments...
July 16, 2017: Anaesthesiology Intensive Therapy
https://www.readbyqxmd.com/read/28711389/population-genetic-structure-antibiotic-resistance-capsule-switching-and-evolution-of-invasive-pneumococci-before-conjugate-vaccination-in-malawi
#12
Chrispin Chaguza, Jennifer E Cornick, Cheryl P Andam, Rebecca A Gladstone, Maaike Alaerts, Patrick Musicha, Chikondi Peno, Naor Bar-Zeev, Arox W Kamng'ona, Anmol M Kiran, Chisomo L Msefula, Lesley McGee, Robert F Breiman, Aras Kadioglu, Neil French, Robert S Heyderman, William P Hanage, Stephen D Bentley, Dean B Everett
INTRODUCTION: Pneumococcal infections cause a high death toll in Sub Saharan Africa (SSA) but the recently rolled out pneumococcal conjugate vaccines (PCV) will reduce the disease burden. To better understand the population impact of these vaccines, comprehensive analysis of large collections of pneumococcal isolates sampled prior to vaccination is required. Here we present a population genomic study of the invasive pneumococcal isolates sampled before the implementation of PCV13 in Malawi...
July 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28710743/prevalence-of-tem-shv-and-ctx-m-genes-of-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-strains-isolated-from-urinary-tract-infections-in-adults
#13
Jayanti Jena, Rajesh Kumar Sahoo, Nagen Kumar Debata, Enketeswara Subudhi
Urinary tract infections (UTIs) are one of the major sources of widespread infectious diseases in the community as well as in the hospitals which increase the cause of morbidity and mortality. Prevalence of extended-spectrum-β-lactamase (ESBL)-producing uropathogenic E. coli isolates has been found to be increased rapidly across the world. The present study was undertaken to find out the frequency of bla TEM, bla CTX-M, and bla SHV genes among E. coli isolates from UTI and detect their sensitivity pattern...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28710611/bad-bacteria-in-acute-appendicitis-rare-but-relevant
#14
Alexander Reinisch, Patrizia Malkomes, Nils Habbe, Wolf Otto Bechstein, Juliane Liese
PURPOSE: Bacterial infections are a factor for morbidity in patients with acute appendicitis (AA). The spreading of multidrug-resistant (MDR) bacteria is a significant problem in surgery, and the most relevant MDR pathogens are summarized as Enterobacteriaceae, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterococci (ESKAPE) bacteria. Data regarding the species and distribution of bacteria in AA are available, but information about the resistances and their relevance is deficient...
July 15, 2017: International Journal of Colorectal Disease
https://www.readbyqxmd.com/read/28709989/evaluating-biapenem-dosage-regimens-in-intensive-care-unit-patients-with-pseudomonas-aeruginosa-infections-a-pharmacokinetic-pharmacodynamic-analysis-using-monte-carlo-simulation
#15
Yongfu Hang, Yafang Chen, Ling Xue, Shusen Sun, Long Liu, Jie Gao, Cheng Xie, Xianfeng Zhang, Jianguo Zhu, Jun Jin, Liyan Miao
This study sought to both identify optimal dosage regimens and estimate pharmacokinetic/pharmacodynamics characteristics of short-infusion (SI) versus extended-infusion (EI) for the use of biapenem against Pseudomonas aeruginosa infections in Chinese Intensive Care patients. A total of 85 strains of P. aeruginosa were collected, and the minimum inhibitory concentration (MIC) of biapenem was measured by the serial two-fold agar dilution method. We designed four frequently used clinical regimens: biapenem 300mg I...
July 11, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28706882/distribution-of-the-strains-of-multidrug-resistant-extensively-drug-resistant-and-pandrug-resistant-pseudomonas-aeruginosa-isolates-from-burn-patients
#16
Hajieh Ghasemian Safaei, Sharareh Moghim, Bahram Nasr Isfahani, Hossein Fazeli, Farkhondeh Poursina, Sima Yadegari, Pourya Nasirmoghadas, Seyed Abolfazl Hosseininassab Nodoushan
BACKGROUND: Pseudomonas aeruginosa is an opportunistic and Gram-negative pathogen that is used as the most important factor in burn wound infections, and due to the rapid acquisition of multidrug resistance (MDR), it causes high mortality rates in these sectors. Thus, diagnosis and assessment of antibiotic resistance patterns are very important in these patients. The aim of this study was to evaluate antibiotic resistance pattern and determining P. aeruginosa MDR. MATERIALS AND METHODS: In this study, phenotypic, biochemical, and polymerase chain reaction tests were used to identify P...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28704651/synergy-between-the-host-immune-system-and-bacteriophage-is-essential-for-successful-phage-therapy-against-an-acute-respiratory-pathogen
#17
Dwayne R Roach, Chung Yin Leung, Marine Henry, Eric Morello, Devika Singh, James P Di Santo, Joshua S Weitz, Laurent Debarbieux
The rise of multi-drug-resistant (MDR) bacteria has spurred renewed interest in the use of bacteriophages in therapy. However, mechanisms contributing to phage-mediated bacterial clearance in an animal host remain unclear. We investigated the effects of host immunity on the efficacy of phage therapy for acute pneumonia caused by MDR Pseudomonas aeruginosa in a mouse model. Comparing efficacies of phage-curative and prophylactic treatments in healthy immunocompetent, MyD88-deficient, lymphocyte-deficient, and neutrophil-depleted murine hosts revealed that neutrophil-phage synergy is essential for the resolution of pneumonia...
July 12, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28698044/resistance-to-first-and-second-line-antituberculosis-drugs-in-southern-taiwan-implications-for-empirical-treatment
#18
Cheng-Yu Kuo, Wen-Hung Wang, Chung-Hao Huang, Yen-Hsu Chen, Po-Liang Lu
BACKGROUND: Multidrug-resistant and extensively drug-resistant tuberculosis infections cause public health concerns worldwide. Local epidemiologic data about the drug resistance of Mycobacteriumtuberculosis isolate (Mtb) is critical to guide appropriate empirical therapy to cure patients and restrain the spread of tuberculosis. METHODS: Antituberculosis susceptibility testing was performed for 287 Mtbs, including 63 MDR-Mtbs collected in southern Taiwan from 2011 to 2015...
June 29, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28697755/spread-of-resistant-gram-negatives-in-a-sri-lankan-intensive-care-unit
#19
Kavinda Tissera, Veranja Liyanapathirana, Nilanthi Dissanayake, Vasanthi Pinto, Asela Ekanayake, Manjula Tennakoon, Dinuka Adasooriya, Dulmini Nanayakkara
BACKGROUND: Infections with multi drug resistant (MDR) organisms are a major problem in intensive care units (ICUs). Proper infection control procedures are mandatory to combat the spread of resistant organisms within ICUs. Well stablished surveillance programmes will enhance the adherence of the staff to infection control protocols. The study was conducted to assess the feasibility of using basic molecular typing methods and routine hospital data for laboratory surveillance of resistance organisms in resource limited settings...
July 11, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28695852/the-multidrug-resistance-transporter-mdfa-from-escherichia-coli-crystallization-and-x-ray-diffraction-analysis
#20
Kumar Nagarathinam, Frank Jaenecke, Yoshiko Nakada-Nakura, Yunhon Hotta, Kehong Liu, So Iwata, Milton T Stubbs, Norimichi Nomura, Mikio Tanabe
The active efflux of antibiotics by multidrug-resistance (MDR) transporters is a major pathway of drug resistance and complicates the clinical treatment of bacterial infections. MdfA is a member of the major facilitator superfamily (MFS) from Escherichia coli and provides resistance to a wide variety of dissimilar toxic compounds, including neutral, cationic and zwitterionic substances. The 12-transmembrane-helix MdfA was expressed as a GFP-octahistidine fusion protein with a TEV protease cleavage site. Following tag removal, MdfA was purified using two chromatographic steps, complexed with a Fab fragment and further purified using size-exclusion chromatography...
July 1, 2017: Acta Crystallographica. Section F, Structural Biology Communications
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