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https://www.readbyqxmd.com/read/28637307/sparing-carbapenem-usage
#1
A Peter R Wilson
Background: Carbapenem resistance in Gram-negative bacteria is increasing in many countries and use of carbapenems and antibiotics to which resistance is linked should be reduced to slow its emergence. There are no directly equivalent antibiotics and the alternatives are less well supported by clinical trials. The few new agents are expensive. Objectives: To provide guidance on strategies to reduce carbapenem usage. Methods: A literature review was performed as described in the BSAC/HIS/BIA/IPS Joint Working Party on Multiresistant Gram-negative Infection Report...
June 15, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28636781/discovery-of-two-bombinin-peptides-with-antimicrobial-and-anticancer-activities-from-the-skin-secretion-of-oriental-fire-bellied-toad-bombina-orientalis
#2
Chang Zhou, Zhengming Wang, Xin Peng, Yao Liu, Yangjun Lin, Zhe Zhang, Yuling Qiu, Meihua Jin, Ran Wang, Dexin Kong
Amphibian skin secretions are known to contain numerous peptides with a large array of biological activities. Bombinins are a group of amphibian derived peptides with broad spectrum antimicrobial activities that have been only identified from the ancient toad species, Bombina. In this study, we described the identification and characterization of a novel bombinin precursor which encoded a bombinin like peptide (BLP-7) and a novel bombinin H type peptide (named as Bombinin H-BO) from the skin secretion of Oriental fire-bellied toad, Bombina orientalis...
June 21, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/28635374/sepsis-favors-high-on-clopidogrel-platelet-reactivity
#3
Karolina Akinosoglou, Angelos Perperis, Spyridoula Theodoraki, Dimitrios Alexopoulos, Charalambos Gogos
High-on-treatment platelet reactivity (HPR) is associated with ischemic events in patients on antiplatelet therapy with a history of cardiovascular disease. On the other hand, recent data have associated sepsis with adverse cardiovascular events in patients admitted with bacteremia or respiratory infection. We aimed to assess P2Y12-mediated platelet reactivity (PR) during sepsis and recovery in patients under clopidogrel. This was a prospective observational study. Incoming patients presenting with signs/symptoms of sepsis already on a maintenance dose of clopidogrel of 75 mg qd for cardiovascular events were included in this study...
June 21, 2017: Platelets
https://www.readbyqxmd.com/read/28635184/design-synthesis-and-biological-evaluation-of-isothiosemicarbazones-with-antimycobacterial-activity
#4
Eva Novotná, Karel Waisser, Jiří Kuneš, Karel Palát, Lenka Skálová, Barbora Szotáková, Vladimír Buchta, Jiřina Stolaříková, Vít Ulmann, Marcela Pávová, Jan Weber, Jitka Komrsková, Pavlína Hašková, Ivan Vokřál, Vladimír Wsól
A series of benzaldehyde and salicylaldehyde-S-benzylisothiosemicarbazones was synthesized and tested against 12 different strains of mycobacteria, Gram-positive and Gram-negative bacteria, and the significant selectivity toward mycobacteria was proved. Twenty-eight derivatives were evaluated for the inhibition of isocitrate lyase, which is a key enzyme of the glyoxylate cycle necessary for latent tuberculosis infection, and their iron-chelating properties were investigated. Two derivatives, 5-bromosalicylaldehyde-S-(4-fluorobenzyl)-isothiosemicarbazone and salicylaldehyde-S-(4-bromobenzyl)-isothiosemicarbazone, influenced the isocitrate lyase activity and caused a better inhibition at 10 μmol/L than 3-nitropropionic acid, a standard inhibitor...
June 21, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28634536/telavancin-a-novel-semisynthetic-lipoglycopeptide-agent-to-counter-the-challenge-of-resistant-gram-positive-pathogens
#5
REVIEW
Biswadeep Das, Chayna Sarkar, Debasmita Das, Amit Gupta, Arnav Kalra, Shubham Sahni
Telavancin (TD-6424), a semisynthetic lipoglycopeptide vancomycin-derivative, is a novel antimicrobial agent developed by Theravance for overcoming resistant Gram-positive bacterial infections, specifically methicillin-resistant Staphylococcus aureus (MRSA). The US Food and Drug Administration (USFDA) had approved telavancin in 2009 for the treatment of complicated skin and skin structure infections (cSSSIs) caused by Gram-positive bacteria, including MRSA (S. aureus, Streptococcus agalactiae, Streptococcus pyogenes, Streptococcus anginosus group, or Enterococcus faecalis)...
March 2017: Therapeutic Advances in Infectious Disease
https://www.readbyqxmd.com/read/28634535/effectiveness-and-safety-of-daptomycin-in-patients-with-infective-endocarditis-undergoing-heart-valve-replacement-a-subgroup-analysis-from-real-world-data
#6
Achyut Guleri, Riccardo Utili, Pascal Dohmen, Kamal Hamed
BACKGROUND: European Cubicin(®) Outcomes Registry and Experience (EU-CORE) was a retrospective, non-interventional, multicenter registry that collected real-world clinical outcomes following daptomycin use for the treatment of Gram-positive infections. EU-CORE data from patients with infective endocarditis (IE) who underwent heart valve replacement were analysed. METHODS: Clinical outcomes were assessed as success (cured or improved), failure, or non-evaluable...
March 2017: Therapeutic Advances in Infectious Disease
https://www.readbyqxmd.com/read/28633864/perinatal-group-b-streptococcal-infections-virulence-factors-immunity-and-prevention-strategies
#7
REVIEW
Jay Vornhagen, Kristina M Adams Waldorf, Lakshmi Rajagopal
Group B streptococcus (GBS) or Streptococcus agalactiae is a β-hemolytic, Gram-positive bacterium that is a leading cause of neonatal infections. GBS commonly colonizes the lower gastrointestinal and genital tracts and, during pregnancy, neonates are at risk of infection. Although intrapartum antibiotic prophylaxis during labor and delivery has decreased the incidence of early-onset neonatal infection, these measures do not prevent ascending infection that can occur earlier in pregnancy leading to preterm births, stillbirths, or late-onset neonatal infections...
June 17, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28633639/fusobacterial-liver-abscess-a-case-report-and-review-of-the-literature
#8
Dilip Jayasimhan, Linus Wu, Paul Huggan
BACKGROUND: Fusobacteriae are facultative anaerobic gram-negative bacilli which cause a range of invasive infections, amongst which pyogenic liver abscesses are rare. We describe a case of Fusobacterium nucleatum liver abscess and review the relevant literature. CASE PRESENTATION: A 51-year-old lady presented with a 4-day history of abdominal pain, diarrhoea, fever, rigors, and lethargy. Imaging revealed an abscess which was drained. Cultures of the blood and abscess aspirate grew Fusobacterium nucleatum and Prevotella pleuritidis respectively...
June 20, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28633586/porphyromonas-gingivalis-and-its-lps-differentially-regulate-the-expression-of-peptidyl-arginine-deiminases-in-human-chondrocytes
#9
René Elkaim, Isaac Maximiliano Bugueno-Valdebenito, Nadia Benkirane-Jessel, Henri Tenenbaum
Periodontitis, an inflammatory disease initiated by Gram-negative bacteria such as Porphyromonas gingivalis ( Pg), is considered as a risk factor for rheumatoid arthritis (RA). Our study aimed to determine the effect of Pg and its LPS on the expression of peptidyl arginine deiminase isotypes (PADs) in human primary chondrocytes (HC). HCs were infected with Pg and activated by its LPS (LPS- Pg). The mRNA expression levels of human PADs (1, 2, 3, 4 and 6) and bacterial enzyme (PADPg) were quantified by RT-qPCR...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/28632822/-strategies-to-reduce-infections-and-antibiotic-use-and-its-effects-in-a-neonatal-care-unit
#10
Soledad Urzúa, Marcela Ferrés, Patricia García, Amparo Sánchez, Matías Luco
INTRODUCTION: Late onset sepsis (LOS) remains an important cause of morbidity and mortality in neonatal intensive care units (NICU). The empirical use of vancomycin and other broad spectrum antibiotics is very frequent and is associated with the emergence of resistant agents, infection by gram-negative bacilli (GNB), fungal infections and increased morbidity and mortality. OBJECTIVE: To evaluate the impact of 5 intervention protocols designed to reduce infections and promote the rational use of antibiotics (AB) in a single NICU...
April 2017: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28632769/combining-omics-and-microscopy-to-visualize-interactions-between-the-asian-citrus-psyllid-vector-and-the-huanglongbing-pathogen-candidatus-liberibacter-asiaticus-in-the-insect-gut
#11
Angela Kruse, Somayeh Fattah-Hosseini, Surya Saha, Richard Johnson, EricaRose Warwick, Kasie Sturgeon, Lukas Mueller, Michael J MacCoss, Robert G Shatters, Michelle Cilia Heck
Huanglongbing, or citrus greening disease, is an economically devastating bacterial disease of citrus. It is associated with infection by the gram-negative bacterium Candidatus Liberibacter asiaticus (CLas). CLas is transmitted by Diaphorina citri, the Asian citrus psyllid (ACP). For insect transmission to occur, CLas must be ingested during feeding on infected phloem sap and cross the gut barrier to gain entry into the insect vector. To investigate the effects of CLas exposure at the gut-pathogen interface, we performed RNAseq and mass spectrometry-based proteomics to analyze the transcriptome and proteome, respectively, of ACP gut tissue...
2017: PloS One
https://www.readbyqxmd.com/read/28631632/risk-of-cardiac-pacemaker-pocket-infection-in-a-tertiary-care-hospital
#12
Jaswinder Singh Gill, Navreet Singh, S P Khanna
BACKGROUND: The risk of pacemaker pocket infections (PPIs) is rare with good antisepsis techniques and use of advanced antibiotics. However, injudicious antibiotic usage leads to the rise of multidrug-resistant bacteria, which may cause PPI. Few reports exist about the microbial spectrum of the PPI from our country, prompting us to study the same. METHODS: We conducted this retrospective observational study for 3 years (January 2013-February 2016) from all the patients with PPI...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28631614/3d-printed-bioceramic-scaffolds-with-antibacterial-and-osteogenic-activity
#13
Yongliang Zhang, Dong Zhai, Mengchi Xu, Qingqiang Yao, Huiying Zhu, Jiang Chang, Chengtie Wu
Bacterial infection poses a significant risk with the wide application of bone graft materials. Designing bone grafts with good antibacterial performance and excellent bone-forming activity is of particular significance for bone tissue engineering. In our study, a 3D printing method was used to prepare β-tricalcium phosphate (β-TCP) bioceramic scaffolds. Silver (Ag) nanoparticles were uniformly dispersed on graphene oxide (GO) to form a homogeneous nanocomposite (named Ag@GO) with different Ag-to-graphene oxide mass ratios, with this being synthesized via the liquid chemical reduction approach...
June 20, 2017: Biofabrication
https://www.readbyqxmd.com/read/28630688/prevalence-of-antimicrobial-resistant-pathogens-from-blood-cultures-results-from-a-laboratory-based-nationwide-surveillance-in-ghana
#14
Japheth Awuletey Opintan, Mercy Jemima Newman
BACKGROUND: Blood stream infections (BSI) are critical medical conditions with high morbidity and mortality. There is paucity of information on BSI from surveillance studies in Ghana. AIM: This study sought to demonstrate how useful BSI data can be gleaned from population-based surveillance, especially from resource-limited settings. METHODS: Data from a nationwide surveillance of antimicrobial drug resistance (AMR) in Ghana were extracted and analyzed...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28630189/in-vitro-activity-of-delafloxacin-and-microbiological-response-against-fluoroquinolone-susceptible-and-non-susceptible-s-aureus-isolates-from-two-phase-3-studies-of-acute-bacterial-skin-and-skin-structure-infections-absssi
#15
S McCurdy, L Lawrence, M Quintas, L Woosley, R Flamm, C Tseng, S Cammarata
Delafloxacin is an investigational anionic fluoroquinolone antibiotic with broad spectrum in vitro activity, including Gram-positive organisms, Gram-negative organisms, atypical organisms, and anaerobes. The in vitro activity of delafloxacin and percent microbiological response in subjects infected with fluoroquinolone susceptible and non-susceptible S. aureus isolates was determined from two global Phase 3 studies of delafloxacin versus vancomycin plus aztreonam in ABSSSI. Patients were enrolled in 23 countries predominately in the US but also Eastern Europe, South America and Asia...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630188/identification-of-a-novel-antibacterial-compound-1-2-4-dichlorophenethyl-amino-3-phenoxypropan-2-ol-active-against-persisters-of-pseudomonas-aeruginosa
#16
Veerle Liebens, Valerie Defraine, Wouter Knapen, Toon Swings, Serge Beullens, Romu Corbau, Arnaud Marchand, Patrick Chaltin, Maarten Fauvart, Jan Michiels
Antibiotics typically fail to completely eradicate a bacterial population, leaving a small fraction of transiently antibiotic-tolerant persister cells intact. Persisters are therefore seen as a major cause of treatment failure and greatly contribute to the recalcitrant nature of chronic infections. The current report is focused on Pseudomonas aeruginosa, a Gram-negative pathogen belonging to the notorious ESKAPE group and, due to an increasing resistance against most conventional antibiotics, posing a serious threat to human health...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630187/cumulative-effect-of-an-antimicrobial-stewardship-and-rapid-diagnostic-testing-bundle-on-early-streamlining-of-antimicrobial-therapy-in-gram-negative-bloodstream-infections
#17
P B Bookstaver, E B Nimmich, T J Smith, J A Justo, J Kohn, K L Hammer, C Troficanto, H A Albrecht, M N Al-Hasan
OBJECTIVES: The use of rapid diagnostic tests (RDT) enhances antimicrobial stewardship programs (ASP) interventions in optimization of antimicrobial therapy. This quasi-experimental cohort study evaluates the combined impact of an ASP/RDT bundle on appropriateness of empirical antimicrobial therapy (EAT) and time to de-escalation of broad-spectrum agents (BSAA) in gram-negative bloodstream infections (GNBSI). METHODS: ASP/RDT bundle consisted of a system-wide GNBSI treatment guidelines, prospective stewardship monitoring, and sequential introduction of two RDTs, Matrix Assisted Laser Desorption Ionization Time-of-Flight (MALDI-TOF) and FilmArray® Blood Culture Identification (BCID) panel...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630178/efficacy-of-cefiderocol-against-carbapenem-resistant-gram-negative-bacilli-in-immunocompetent-rat-respiratory-tract-infection-models-recreating-human-plasma-pharmacokinetics
#18
Shuhei Matsumoto, Christine M Singley, Jennifer Hoover, Rio Nakamura, Roger Echols, Stephen Rittenhouse, Masakatsu Tsuji, Yoshinori Yamano
Cefiderocol (S-649266), a novel siderophore cephalosporin, shows potent activity against carbapenem-resistant Gram-negative bacilli. In this study, we evaluated the efficacy of cefiderocol against carbapenem-resistant Gram-negative bacilli (Pseudomonas aeruginosa,Acinetobacter baumannii and Klebsiella pneumoniae) in immunocompetent rat respiratory tract infection models recreating plasma pharmacokinetics (PK) profiles in healthy human subjects. A total of 6 clinical isolates (1 cephalosporin-susceptible P. aeruginosa, 1 multidrug-resistant P...
June 19, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28630128/identification-of-a-d-arabinose-5-phosphate-isomerase-in-the-gram-positive-clostridium-tetani
#19
David L Cech, Katherine Markin, Ronald W Woodard
d-Arabinose-5-phosphate isomerases (APIs) catalyze the interconversion of d-ribulose-5-phosphate and d-arabinose-5-phosphate. Various Gram-negative bacteria, such as the uropathogenic E. coli strain CFT073, contain multiple API paralogs (KdsD, GutQ, KpsF and c3406) that have been assigned various cellular functions. The d-arabinose-5-phosphate formed by these enzymes seems to play important roles in the biosynthesis of lipopolysaccharide and group 2 K-antigen capsules, as well as in the regulation of the cellular d-glucitol uptake and uropathogenic infectivity/virulence...
June 19, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28630070/regulation-of-type-iii-secretion-of-translocon-and-effector-proteins-by-the-esab-esal-esam-complex-in-edwardsiella-tarda
#20
Lu Yi Liu, Pin Nie, Hong Bing Yu, Hai Xia Xie
The type III secretion system (T3SS) plays a crucial role in the pathogenesis of many Gram-negative bacteria, including Edwardsiella tarda, an important fish pathogen. Within the E. tarda T3SS, there are three proteins (EsaB/EsaL/EsaM) that are homologous to proteins present in many other bacteria, including SpiC/SsaL/SsaM in Salmonella, SepD/SepL/CesL in EPEC and EHEC, and YscB/YopN/SycN in Yersinia EsaL was found to interact with both EsaB and EsaM within the bacterial cell, as revealed by a co-immunoprecipitation assay...
June 19, 2017: Infection and Immunity
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