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https://www.readbyqxmd.com/read/28820574/thiol-containing-metallo-%C3%AE-lactamase-inhibitors-resensitize-resistant-gram-negative-bacteria-to-meropenem
#1
Kamaleddin Haj Mohammad Ebrahim Tehrani, Nathaniel I Martin
The prevalence of infections caused by metallo-β-lactamase (MBL) expressing Gram-negative bacteria has grown at an alarming rate in recent years. Despite the fact that MBLs can deactivate virtually all β-lactams antibiotics, there are as of yet no approved drugs available that inhibit their activity. We here examine the ability of previously reported thiol-based MBL inhibitors to synergize with meropenem against a panel of Gram-negative carbapenem-resistant isolates expressing different β-lactamases. Among the compounds tested, thiomandelic acid 3 and 2-merpto-3-phenylpropionic acid 4 were found to efficiently potentiate the activity of meropenem, especially against an IMP producing strain of K...
August 18, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28818628/a-prospective-multicentre-study-of-the-epidemiology-and-outcomes-of-bloodstream-infection-in-cirrhotic-patients
#2
Michele Bartoletti, Maddalena Giannella, Russell Lewis, Paolo Caraceni, Sara Tedeschi, Mical Paul, Christoph Schramm, Tony Bruns, Manuela Merli, Nazaret Cobos-Trigueros, Elena Seminari, Pilar Retamar, Patricia Muñoz, Mario Tumbarello, Patrizia Burra, Maria Torrani Cerenzia, Bruno Barsic, Ester Calbo, Alberto Enrico Maraolo, Nicola Petrosillo, Maria Angeles Galan-Ladero, Giampiero D'Offizi, Noa Bar Sinai, Jesus Rodríguez-Baño, Gabriella Verucchi, Mauro Bernardi, Pierluigi Viale
OBJECTIVE: The aim of this study was to describe the current epidemiology of BSI in patients with cirrhosis, analyse predictors of 30-day mortality, and risk factors for antibiotic resistance. METHODS: Cirrhotic patients developing a BSI episode were prospectively included at 19 centres in five countries from September 2014 to December 2015. The discrimination of mortality risk scores for 30-day mortality were compared by area under the receiver operator-risk and Cox-regression models...
August 14, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28815897/multidrug-resistant-enterobacteriaceae-pseudomonas-aeruginosa-and-vancomycin-resistant-enterococci-three-major-threats-to-hematopoietic-stem-cell-transplant-recipients
#3
REVIEW
Michael J Satlin, Thomas J Walsh
Hematopoietic stem cell transplant (HSCT) recipients are uniquely threatened by the emergence of multidrug-resistant (MDR) bacteria because these patients rely on immediate active antimicrobial therapy to combat bacterial infections. This review describes the epidemiology and treatment considerations for three challenging MDR bacterial pathogens in HSCT recipients: MDR Enterobacteriaceae, including extended-spectrum β-lactamase (ESBL)-producing and carbapenem-resistant Enterobacteriaceae (CRE), Pseudomonas aeruginosa, and vancomycin-resistant Enterococcus (VRE)...
August 16, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28815094/add-on-therapy-with-ertapenem-in-infections-with-multidrug-resistant-gram-negative-bacteria-pediatric-experience
#4
Sevgen Tanır Basaranoglu, Yasemin Ozsurekci, Kubra Aykac, Kamile Oktay Arıkan, Ayse Buyukcam, Ali Bulent Cengiz, Mehmet Ceyhan, Ates Kara
Optimal therapy for infections with carbapenem resistant GNB is not well established due to the weakness of data. Patients presenting with bloodstream infections caused by multidrug resistant Klebsiella pneumoniae were treated with a combination treatment. Optimal therapy for infections with carbapenem resistant Gram-negative bacteria is a serious problem in pediatric patients. We presented three cases who were successfully treated with addition of ertapenem to the combination treatment for bacteremia with multidrug resistant Klebsiella pneumoniae...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28815023/antibiotic-resistance-ability-to-form-biofilm-and-susceptibility-to-copper-alloys-of-selected-staphylococcal-strains-isolated-from-touch-surfaces-in-polish-hospital-wards
#5
Anna Różańska, Agnieszka Chmielarczyk, Dorota Romaniszyn, Małgorzata Bulanda, Monika Walkowicz, Piotr Osuch, Tadeusz Knych
BACKGROUND: Despite the employment of sanitary regimes, contact transmission of the aetiological agents of hospital infections is still exceedingly common. The issue of microbe transmission becomes particularly important when facing multidrug-resistant microorganisms such as methicillin-resistant staphylococci. In the case of deficiencies in cleaning and disinfection procedures, hospital equipment made of copper alloys can play an important role, complementing traditional hospital hygiene procedures...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28814284/effect-of-poly-hexamethylene-biguanide-hydrochloride-phmb-treated-non-sterile-medical-gloves-upon-the-transmission-of-streptococcus-pyogenes-carbapenem-resistant-e-coli-mrsa-and-klebsiella-pneumoniae-from-contact-surfaces
#6
S Ali, A P R Wilson
BACKGROUND: Reduction of accidental contamination of the near-patient environment has potential to reduce acquisition of healthcare-associated infection(s). Although medical gloves should be removed when soiled or touching the environment, compliance is variable. The use of antimicrobial-impregnated medical gloves could reduce the horizontal-transfer of bacterial contamination between surfaces. AIM: Determine the activity of antimicrobial-impregnated gloves against common hospital pathogens: Streptococcus pyogenes, carbapenem-resistant E...
August 17, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28813778/the-bactericidal-effect-of-high-temperature-is-an-essential-resistance-mechanism-of-chicken-macrophage-against-brucella-abortus-infection
#7
Lauren Togonon Arayan, Alisha Wehdnesday Bernardo Reyes, Huynh Tan Hop, Huy Tran Xuan, Eun Jin Baek, Wongi Min, Suk Kim
Knowledge of avian host responses to brucellosis is critical to understanding how avian resists this infection however this mechanism is not well established. On the other hand, temperature has a major involvement in the physiology of living organisms and cell death induced by heat is attributed to protein denaturation. This study demonstrates the direct bactericidal effect of a higher temperature (41ºC) to Brucella (B.) abortus that resulted in the gradual reduction of intracellular bacteria that inhibits bacterial growth within avian macrophage HD11 along an increasing period of time...
August 17, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28811642/octahedron-iron-oxide-nanocrystals-prohibited-clostridium-difficile-spore-germination-and-attenuated-local-and-systemic-inflammation
#8
Wei-Ting Lee, Ya-Na Wu, Yi-Hsuan Chen, Shang-Rung Wu, Tsai-Miao Shih, Tsung-Ju Li, Li-Xing Yang, Chen-Sheng Yeh, Pei-Jane Tsai, Dar-Bin Shieh
Clinical management of Clostridium difficile infection is still far from satisfactory as bacterial spores are resistant to many chemical agents and physical treatments. Certain types of nanoparticles have been demonstrated to exhibit anti-microbial efficacy even in multi-drug resistance bacteria. However, most of these studies failed to show biocompatibility to the mammalian host cells and no study has revealed in vivo efficacy in C. difficile infection animal models. The spores treated with 500 µg/mL Fe3-δO4 nanoparticles for 20 minutes, 64% of the spores were inhibited from transforming into vegetative cells, which was close to the results of the sodium hypochlorite-treated positive control...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810659/hyaluronic-acid-conjugation-facilitates-clearance-of-intracellular-bacterial-infections-by-streptomycin-with-neglectable-nephrotoxicity
#9
Yuanhao Qiu, Yilin Hou, Feifei Sun, Peng Chen, Dongdong Wang, Haibo Mu, Xiaoli Zhang, Kan Ding, Jinyou Duan
Antibiotics such as β-lactams and aminoglycosides are often subtherapeutic to intracellular infections due to their high hydrophilicity, resulting in low effectiveness against intracellular pathogens and the emergence of antibiotic resistance. Here we reported that an endogenous aminoglycan, hyaluronic acid could be an effective carbohydrate carrier of the aminoglycoside antibiotic, streptomycin against intracellular pathogens. This conjugation could enhance phagocytic activity, and facilitated the entry of streptomycin into host cells via a CD44-mediated pathway...
September 1, 2017: Glycobiology
https://www.readbyqxmd.com/read/28810536/drug-resistant-gram-negative-uropathogens-a-review
#10
REVIEW
Saeed Khoshnood, Mohsen Heidary, Reza Mirnejad, Aghil Bahramian, Mansour Sedighi, Habibollah Mirzaei
Urinary tract infection(UTI) caused by Gram-negative bacteria is the second most common infectious presentation in community medical practice. Approximately 150 million people are diagnosed with UTI each year worldwide. Drug resistance in Gram-negative uropathogens is a major global concern which can lead to poor clinical outcomes including treatment failure, development of bacteremia, requirement for intravenous therapy, hospitalization, and extended length of hospital stay. The mechanisms of drug resistance in these bacteria are important due to they are often not identified by routine susceptibility tests and have an exceptional potential for outbreaks...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28810329/-distribution-and-drug-resistance-of-pathogens-at-hematology-department-of-jiangsu-province-from-2014-to-2015-results-from-a-multicenter-retrospective-study
#11
Y K Wan, W Sang, B Chen, Y G Yang, L Q Zhang, A N Sun, Y J Liu, Y Xu, Y P Cai, C B Wang, Y F Shen, Y W Jiang, X Y Zhang, W Xu, M Hong, T Chen, R R Xu, F Li, Y L Xu, Y Xue, Y L Lu, Z M He, W M Dong, Z Chen, M H Ji, Y Y Yang, L J Zhai, Y Zhao, G Q Wu, J H Ding, J Cheng, W B Cai, Y M Sun, J Ouyang
Objective: To describe the distribution and drug resistance of pathogens at hematology department of Jiangsu Province from 2014 to 2015 to provide reference for empirical anti-infection treatment. Methods: Pathogens were from hematology department of 26 tertiary hospitals in Jiangsu Province from 2014 to 2015. Antimicrobial susceptibility testing was carried out according to a unified protocol using Kirby-Bauer method or agar dilution method. Collection of drug susceptibility results and corresponding patient data were analyzed...
July 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28808163/a-role-for-fimh-in-extraintestinal-pathogenic-escherichia-coli-invasion-and-translocation-through-the-intestinal-epithelium
#12
Nina M Poole, Sabrina I Green, Anubama Rajan, Luz E Vela, Xi-Lei Zeng, Mary K Estes, Anthony W Maresso
The translocation of bacteria across the intestinal epithelium of immunocompromised patients can lead to bacteremia and life-threatening sepsis. Extraintestinal Pathogenic Escherichia coli (ExPEC), so named because this pathotype infects tissues distal to the intestinal tract, is a frequent cause of such infections, is often multidrug resistant, and chronically colonizes a sizable portion of the healthy population. Although several virulence factors and their roles in pathogenesis are well described for ExPEC that cause urinary tract infections and meningitis, they have not been linked to translocation through intestinal barriers, a fundamentally distant yet important clinical phenomenon...
August 14, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28807906/impact-of-type-iii-secretion-effectors-and-of-phenoxyacetamide-inhibitors-of-type-iii-secretion-on-abscess-formation-in-a-mouse-model-of-pseudomonas-aeruginosa-infection
#13
Bryan J Berube, Katherine Murphy, Matthew C Torhan, Nicholas O Bowlin, John D Williams, Terry L Bowlin, Donald T Moir, Alan R Hauser
Pseudomonas aeruginosa is a leading cause of intra-abdominal infections, wound infections, and community-acquired folliculitis, each of which may involve macro- or micro-abscess formation. The rising incidence of multi-drug resistance among P. aeruginosa isolates has increased both the economic burden and the morbidity and mortality associated with P. aeruginosa disease and necessitates a search for novel therapeutics. Previous work from our group detailed novel phenoxyacetamide inhibitors that block type III secretion and injection into host cells in vitro In this study, we used a murine abscess model of P...
August 14, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28807835/the-role-of-antimicrobial-stewardship-programmes-in-children-a-systematic-review
#14
REVIEW
André Ricardo Araujo da Silva, Déborah Cardoso Albernaz de Almeida Dias, Amanda Fáris Marques, Clara Biscaia di Biase, Indah K Murni, Angela Dramowski, Mike Sharland, Johanes Huebner, Walter Zingg
The United Nations and the World Health Organization have designated antimicrobial resistance (AMR) as a major health priority and developed action plans to reduce AMR in all healthcare settings. Establishment of institutional antimicrobial stewardship programmes (ASPs) is advocated as a key intervention to reduce antibiotic consumption in hospitals and address high rates of multi-drug resistant (MDR) bacteria. We searched PUBMED and the Cochrane database of systematic reviews (1/2007-3/2017) to identify studies reporting about the effectiveness of ASPs in general paediatric wards and paediatric intensive care units (PICU), on reducing antibiotic consumption, on using broad spectrum/restricted antibiotics, and on antibiotic resistance and healthcare-associated infections (HAIs)...
August 11, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28807566/electrospun-collagen-based-nanofibres-a-sustainable-material-for-improved-antibiotic-utilisation-in-tissue-engineering-applications
#15
Ivan J Hall Barrientos, Eleonora Paladino, Peter Szabó, Sarah Brozio, Peter J Hall, Charles I Oseghale, Melissa K Passarelli, Susan J Moug, Richard A Black, Clive G Wilson, Romana Zelkó, Dimitrios A Lamprou
For the creation of scaffolds in tissue engineering applications, it is essential to control the physical morphology of fibres and to choose compositions which do not disturb normal physiological function. Collagen, the most abundant protein in the human body, is a well-established biopolymer used in electrospinning compositions. It shows high in-vivo stability and is able to maintain a high biomechanical strength over time. In this study, the effects of collagen type I in polylactic acid-drug electrospun scaffolds for tissue engineering applications are examined...
August 11, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28807000/necrotizing-streptococcal-myositis-of-the-upper-extremity-a-case-report
#16
Johannes C Reichert, Götz Habild, Paul Simon, Ulrich Nöth, Jan B Krümpelmann
BACKGROUND: Necrotizing myositis is a rare but life-threatening soft-tissue infection characterized by rapidly spreading inflammation and subsequent necrosis of the affected tissue. The myositis is often caused by toxin-producing, virulent bacteria such as group A β-hemolytic streptococcus and associated with severe systemic toxicity. It is rapidly fatal unless diagnosed promptly and treated aggressively. However, necrotizing myositis is often initially misdiagnosed as a more benign soft-tissue infection as such fulminant, invasive muscle infections are rare with no more than 30 cases reported over the last century...
August 15, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28806528/surface-adaptive-gold-nanoparticles-with-effective-adherence-and-enhanced-photothermal-ablation-of-methicillin-resistant-staphylococcus-aureus-biofilm
#17
Dengfeng Hu, Huan Li, Bailiang Wang, Zi Ye, Wenxi Lei, Fan Jia, Qiao Jin, Ke-Feng Ren, Jian Ji
Biofilms that contribute to the persistent bacterial infections pose serious threats to global public health, mainly due to their resistance to antibiotics penetration and escaping innate immune attacks by phagocytes. Here, we report a kind of surface-adaptive gold nanoparticles (AuNPs) exhibiting (1) a self-adaptive target to the acidic microenvironment of biofilm, (2) an enhanced photothermal ablation of methicillin-resistant Staphylococcus aureus (MRSA) biofilm under near-infrared (NIR) light irradiation, and (3) no damage to the healthy tissues around the biofilm...
August 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28804572/bacterial-infections-post-living-donor-liver-transplantation-in-egyptian-hepatitis-c-virus-cirrhotic-patients-a-single-center-study
#18
Mohamed F Montasser, Nadia A Abdelkader, Sara M Abdelhakam, Hany Dabbous, Iman F Montasser, Yasmine M Massoud, Waleed Abdelmoaty, Shereen A Saleh, Mohamed Bahaa, Hany Said, Mahmoud El-Meteini
AIM: To determine risk factors, causative organisms and antimicrobial resistance of bacterial infections following living-donor liver transplantation (LDLT) in cirrhotic patients. METHODS: This prospective study included 45 patients with hepatitis C virus-related end-stage liver disease who underwent LDLT at Ain Shams Center for Organ Transplant, Cairo, Egypt from January 2014 to November 2015. Patients were followed-up for the first 3 mo after LDLT for detection of bacterial infections...
July 18, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28803980/humoral-immune-response-of-galleria-mellonella-after-repeated-infection-with-bacillus-thuringiensis
#19
Paulina Taszłow, Lidiia Vertyporokh, Iwona Wojda
The insect immune system relies on innate mechanisms only. However, there is an increasing number of data reporting that previous immune challenge with microbial elicitors or a low number of microorganisms can modulate susceptibility after subsequent lethal infection with the same or different pathogen. This phenomenon is called immune priming. Its biochemical and molecular mechanisms remain unravelled. Here we present that Galleria mellonella larvae that survived infection induced by intrahemocelic injection of a low dose of Bacillus thuringiensis were more resistant to re-injection of a lethal dose of the same bacteria but not with other bacteria and fungi tested...
August 10, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28803838/current-epidemiology-of-resistance-among-gram-negative-bacilli-in-pediatric-patients-in-turkey
#20
Kubra Aykac, Yasemin Ozsurekci, Sevgen Tanir Basaranoglu, Mustafa Senol Akin, Ali Bulent Cengiz, Asiye Bicakcigil, Banu Sancak, Ates Kara, Mehmet Ceyhan
BACKGROUND: The increasing incidence of infections caused by drug-resistant Gram-negative organisms has led to a reemergence in worldwide. This study attempted to investigate the changes in resistance of Gram-negative bacteria to different classes of antibiotics and treatment options in invasive infections. METHODS: We performed this study retrospectively between January 2012 and January 2017 in our tertiary care university hospital. A total of 302 patients with Gram-negative bacterial bacteremia and meningitis were defined...
August 10, 2017: Journal of Global Antimicrobial Resistance
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