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Gram negative infections

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https://www.readbyqxmd.com/read/28214914/the-impact-of-bitter-taste-receptor-genetics-on-culturable-bacteria-in-chronic-rhinosinusitis
#1
D I Rom, J M Christensen, R Alvarado, R Sacks, R J Harvey
BACKGROUND: Extra-oral bitter taste receptors have been associated with innate bacterial defence mechanisms. Genetic variation in T2R38 functionality has been shown to be associated with susceptibility to upper respiratory tract infections and chronic rhinosinusitis (CRS). We sought to independently assess the influence of bitter taste receptor genotype on the presence of culturable bacteria in the sinuses. METHODOLOGY: A cross-sectional analysis of patients with CRS undergoing surgery was performed...
February 19, 2017: Rhinology
https://www.readbyqxmd.com/read/28213878/cotransfecting-norepinephrine-transporter-and-vesicular-monoamine-transporter-2-genes-for-increased-retention-of-metaiodobenzylguanidine-labeled-with-iodine-131-in-malignant-hepatocarcinoma-cells
#2
Yanlin Zhao, Xiao Zhong, Xiaohong Ou, Huawei Cai, Xiaoai Wu, Rui Huang
Norepinephrine transporter (NET) transfection leads to significant uptake of iodine-131-labeled metaiodobenzylguanidine ((131)I-MIBG) in non-neuroendocrine tumors. However, the use of (131)I-MIBG is limited by its short retention time in target cells. To prolong the retention of (131)I-MIBG in target cells, we infected hepatocarcinoma (HepG2) cells with Lentivirus-encoding human NET and vesicular monoamine transporter 2 (VMAT2) genes to obtain NET-expressing, NET-VMAT2-coexpressing, and negative-control cell lines...
February 17, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28210463/frequency-of-inducible-clindamycin-resistance-among-gram-positive-cocci-in-a-tertiary-hospital-tehran-iran
#3
Hiva Saffar, Afsaneh Rajabiani, Alireza Abdollahi, Shirin Habibi, Zohreh Baseri
BACKGROUND AND OBJECTIVES: Accurate designation of antimicrobial susceptibility pattern of the infecting microorganisms is an important crucial factor in making appropriate therapeutic decisions. Macrolide, lincosamide and streptogramin B antibiotics are in a family, reserved as an alternative approach in treatment of resistant Gram positive cocci. Amongst them, clindamycin has been considered as the preferred agent due to its excellent pharmacokinetic properties. The inducible resistance to clindamycin in Gram positive staphylococci and streptococci cannot be recognized by routine broth or agar based susceptibility tests and D-zone testing is necessary...
August 2016: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/28209132/urinary-tract-infection-among-fistula-patients-admitted-at-hamlin-fistula-hospital-addis-ababa-ethiopia
#4
Matifan Dereje, Yimtubezinesh Woldeamanuel, Daneil Asrat, Fekade Ayenachew
BACKGROUND: Urinary Tract Infection (UTI) causes a serious health problem and affects millions of people worldwide. Patients with obstetric fistula usually suffer from incontinence of urine and stool, which can predispose them to frequent infections of the urinary tract. Therefore the aim of this study was to determine the etiologic agents, drug resistance pattern of the isolates and associated risk factor for urinary tract infection among fistula patients in Addis Ababa fistula hospital, Ethiopia...
February 16, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28208914/enterobacter-meningitis-and-challenges-in-treatment
#5
Shaylika Chauhan, Jawad Noor, Balaji Yegneswaran, Hanish Kodali
Neurosurgical interventions are rarely associated with meningitis with a very low incidence rate ranging from 1.1% to 2.5%. Gram negative bacillary meningitis first described in the 1940's, previously uncommon has been increasing in the recent past associated with advanced age, immunosuppression and neurosurgery. Enterobacter meningitis though relatively uncommon is recently increasing in incidence and treatment is frequently complicated due to resistance to antibiotics making this a challenging, difficult to treat infection that may be associated with adverse clinical outcomes...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208889/management-of-pneumonia-and-blood-stream-infections-with-new-antibiotic-adjuvant-entity-ceftriaxone-sulbactam-disodium-edetate-a-novel-way-to-spare-carbapenems
#6
Mohammad Shameem, Mohammad Amin Mir
INTRODUCTION: Nosocomial infections have been considered as a major health problem causing incremental morbidity, mortality and costs of therapy. AIM: This retrospective study was initiated with aim to analyse the comparative efficacy of a novel Antibiotic Adjuvant Entity (AAE), a combination of ceftriaxone + sulbactam + disodium edetate and meropenem in combination with colistin, for the management of Multi Drug Resistant (MDR) nosocomial Gram-negative bacterial infections...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28208857/emergence-of-hospital-acquired-carbapenem-resistant-non-fermenters-in-teaching-institute
#7
Hariom Sharan, Neeraj Katare, Aparna Pandey, Ganesh Shivmurti Bhatambare, Trupti Bajpai
INTRODUCTION: Non-Fermenting Gram Negative Bacilli (NFGNB) are emerging now-a-days because of their tendency to colonize various surfaces and inherent resistance to commonly used disinfectants. They are responsible for multi-drug resistant hospital acquired infections. Detection of carbapenem resistance mechanisms is essential for treatment and infection control purpose as can spread to other organisms causing hospital outbreaks. AIM: To characterize non-fermenters from various clinical samples and to detect different carbapenem resistance mechanisms in meropenem resistant isolates...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207768/prevalence-of-mdr-pathogens-of-bacterial-meningitis-in-egypt-and-new-synergistic-antibiotic-combinations
#8
Mona M Abdelkader, Khaled M Aboshanab, Marwa A El-Ashry, Mohammad M Aboulwafa
The aim of this study was identifying bacterial pathogens involved in meningitis, studying their antibiotic resistance profiles, investigating the antibiotic resistance genes as well as evaluating the use of various antibiotic combinations. Antibiotic susceptibility tests were evaluated according to CLSI guidelines. Antibiotic combinations were evaluated by calculating the Fractional Inhibitory Concentration (FIC) index. A total of 71 bacterial isolates were recovered from 68 culture positive CSF specimens...
2017: PloS One
https://www.readbyqxmd.com/read/28207376/hookworm-infection-in-south-american-fur-seal-arctocephalus-australis-pups
#9
M Seguel, F Muñoz, M J Navarrete, E Paredes, E Howerth, N Gottdenker
Tissues of South American fur seal pups naturally infected with hookworms ( Uncinaria sp) were examined. Hookworm infection was found in nearly all pups examined (132/140, 94%), and hookworm enteritis with secondary bacteremia was considered the cause of death in 46 (35%) pups. Common findings in these pups included severe hemorrhagic enteritis and numerous (mean intensity = 761.8) hookworms in the jejunum. Hookworms were recovered from the abdominal cavity in 12 of 55 pups (22%) examined through peritoneal wash; these pups had an average of 1343...
March 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28207269/a-biocompatible-injectable-hydrogel-with-potent-wound-healing-and-antibacterial-properties
#10
Jiaul Hoque, Relekar G Prakash, Krishnamoorthy Paramanandham, Bibek R Shome, Jayanta Haldar
Two component injectable hydrogels that cross-link in-situ have been used as non-invasive wound-filling devices, i.e., sealants. These materials carry a variety of functions at the wound sites such as seal leaks, cease unwanted bleeding, bind tissues together, and assist in wound healing process. However, commonly used sealants typically lack antibacterial properties. Since bacterial infection at the wound site is very common, bioadhesive materials with intrinsic antibacterial properties are urgently required...
February 16, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28205160/non-fermentative-gram-negative-rods-bacteremia-in-children-with-cancer-a-14-year-single-center-experience
#11
D Averbuch, C Avaky, M Harit, P Stepensky, I Fried, T Ben-Ami, V Temper, Y Peled, H Troen, R Masarwa, W Abu Ahmad, M Weintraub, S Revel-Vilk, D Engelhard
PURPOSE: Data on non-fermentative Gram-negative rods (NFGNR) bacteremia in children with malignancies are limited. The aim of this study was to present clinical picture, antimicrobial susceptibility pattern, risk factors for resistance and outcome in NFGNR bacteremia in children with cancer. METHODS: All episodes of NFGNR bacteremia occurring during 2001-2014 in children with cancer in a tertiary-care hospital were retrospectively analyzed. Pseudomonas and Acinetobacter spp...
February 15, 2017: Infection
https://www.readbyqxmd.com/read/28203469/salmonella-enterica-serotype-typhi-bacteremia-complicating-pregnancy-in-the-third-trimester
#12
George F Guirguis, Krunal Patel, Lisa Gittens-Williams, Joseph J Apuzzio, Kristina Martimucci, Shauna F Williams
Background. Salmonella enterica serotype Typhi (S. Typhi) is an anaerobic gram-negative enteric rod that causes infection when contaminated food or water is ingested and may cause illness in pregnancy. Case. This is a patient who presented at 31 weeks' gestation with abdominal pain and fever and was diagnosed with S. Typhi bacteremia. Conclusion. S. Typhi should be considered in febrile patients with recent travel presenting with abdominal discomfort with or without elevated liver enzymes.
2017: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28203427/potency-of-parenteral-antimicrobials-including-ceftolozane-tazobactam-against-nosocomial-respiratory-tract-pathogens-considerations-for-empiric-and-directed-therapy
#13
Christina A Sutherland, David P Nicolau
BACKGROUND: Empiric therapy decisions are predicated on knowledge of both the epidemiology and antimicrobial susceptibility of the probable infecting pathogen(s). The objective of this study was to evaluate the microbial distribution and phenotypic profiles of nosocomial respiratory isolates collected from multiple US hospitals and assess the clinical utility of various monotherapy and combination regimens. METHODS: Hospitals provided consecutive non-duplicate adult inpatients Gram-negative nosocomial respiratory isolates from cultures received ≥48 h after hospital admission...
January 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28202116/-pathogens-of-infections-in-the-induction-period-of-childhood-acute-lymphoblastic-leukemia-and-drug-resistance-of-isolated-strains
#14
Zai-Sheng Chen, Ling Zheng, Yi-Qiao Chen, Jing-Hui Yang, Jian Li
OBJECTIVE: To investigate the infections occurring in the induction period of childhood acute lymphoblastic leukemia (ALL), the pathogens of the infections, and drug resistance of isolated strains. METHODS: A retrospective analysis was performed for the clinical data of 130 children with newly-diagnosed childhood ALL. Infections occurring during the induction chemotherapy, pathogenic strains, and drug-resistance spectrum were analyzed. RESULTS: The incidence rate of clinical infection and/or microbial infection reached 76...
February 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28198662/changes-in-bacterial-epidemiology-and-antibiotic-resistance-among-veterans-with-spinal-cord-injury-disorder-over-the-past-9-years
#15
Margaret A Fitzpatrick, Katie J Suda, Nasia Safdar, Stephen P Burns, Makoto M Jones, Linda Poggensee, Swetha Ramanathan, Charlesnika T Evans
OBJECTIVE: Patients with spinal cord injury and disorder (SCI/D) have an increased risk of infection with multidrug-resistant (MDR) bacteria. We described bacterial epidemiology and resistance in patients with SCI/D at Veterans Affairs Medical Centers (VAMCs) for the past 9 years. DESIGN: Retrospective cohort Setting: One hundred thirty VAMCs. PARTICIPANTS: Veterans with SCI/D and bacterial cultures with antibiotic susceptibility testing performed between 1/1/2005-12/31/2013...
February 15, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/28198170/antibacterial-effect-of-sevoflurane-and-isoflurane
#16
M Martínez-Serrano, M Gerónimo-Pardo, A Martínez-Monsalve, M D Crespo-Sánchez
OBJECTIVE: Multidrug resistant bacteria are increasing worldwide and therapeutic options are limited. Some anaesthetics have shown antibacterial activity before. In this study, we have investigated the antibacterial effect of the halogenated anaesthetic agents sevoflurane and isoflurane against a range of resistant pathogens. METHODS: Two experiments were conducted. In the first, bacterial suspensions of both ATCC and resistant strains of Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa were exposed to liquid sevoflurane and isoflurane during 15, 30 and 60 minutes...
February 15, 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28196878/global-characterization-of-protein-secretion-from-human-macrophages-following-non-canonical-caspase-4-5-inflammasome-activation
#17
Martina B Lorey, Katariina Rossi, Kari K Eklund, Tuula A Nyman, Sampsa Matikainen
Gram-negative bacteria are associated with a wide spectrum of infectious diseases in humans. Inflammasomes are cytosolic protein complexes that are assembled when the cell encounters pathogens or other harmful agents. The non-canonical caspase-4/5 inflammasome is activated by gram-negative bacteria-derived lipopolysaccharide (LPS) and by endogenous oxidized phospholipids. Protein secretion is a critical component of the innate immune response. Here we have used label-free quantitative proteomics to characterize global protein secretion in response to non-canonical inflammasome activation upon intracellular LPS recognition in human primary macrophages...
February 14, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28195681/recent-advances-in-the-discovery-of-pqsd-inhibitors-as-antimicrobial-agents
#18
Shutao Ma, Ziteng Zhou
The treatment of the infections caused by Pseudomonas aeruginosa, an opportunistic Gram-negative bacterium, is very difficult. High intrinsic tolerance towards common antibiotics and the development of new resistant strains challenge us to find a new treatment as soon as possible. PqsD is an enzyme essential for Pseudomonas aeruginosa quorum sensing apparatus, which catalyzes the last and key step in the biosynthesis of HHQ that is a signal molecule of the P. aeruginosa quorum sensing system. In this review, following an outline on their structures, we present a brief introduction of the PqsD inhibitors including their mechanisms of action, inhibitory activity and structure-activity relationships...
February 14, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28195158/infection-derived-lipids-elicit-an-immune-deficiency-circuit-in-arthropods
#19
Dana K Shaw, Xiaowei Wang, Lindsey J Brown, Adela S Oliva Chávez, Kathryn E Reif, Alexis A Smith, Alison J Scott, Erin E McClure, Vishant M Boradia, Holly L Hammond, Eric J Sundberg, Greg A Snyder, Lei Liu, Kathleen DePonte, Margarita Villar, Massaro W Ueti, José de la Fuente, Robert K Ernst, Utpal Pal, Erol Fikrig, Joao H F Pedra
The insect immune deficiency (IMD) pathway resembles the tumour necrosis factor receptor network in mammals and senses diaminopimelic-type peptidoglycans present in Gram-negative bacteria. Whether unidentified chemical moieties activate the IMD signalling cascade remains unknown. Here, we show that infection-derived lipids 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol (POPG) and 1-palmitoyl-2-oleoyl diacylglycerol (PODAG) stimulate the IMD pathway of ticks. The tick IMD network protects against colonization by three distinct bacteria, that is the Lyme disease spirochete Borrelia burgdorferi and the rickettsial agents Anaplasma phagocytophilum and A...
February 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28194286/central-venous-catheter-related-bloodstream-infection-with-kocuria-kristinae-in-a-patient-with-propionic-acidemia
#20
Masato Kimura, Eichiro Kawai, Hisao Yaoita, Natsuko Ichinoi, Osamu Sakamoto, Shigeo Kure
Kocuria kristinae is a catalase-positive, coagulase-negative, Gram-positive coccus found in the environment and in normal skin and mucosa in humans; however, it is rarely isolated from clinical specimens and is considered a nonpathogenic bacterium. We describe a case of catheter-related bacteremia due to K. kristinae in a young adult with propionic acidemia undergoing periodic hemodialysis. The patient had a central venous catheter implanted for total parenteral nutrition approximately 6 months prior to the onset of symptoms because of repeated acute pancreatitis...
2017: Case Reports in Infectious Diseases
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