keyword
MENU ▼
Read by QxMD icon Read
search

Gram negative infection

keyword
https://www.readbyqxmd.com/read/28731836/mortality-rate-and-antibiotic-resistance-in-complicated-diverticulitis-report-of-272-consecutive-patients-worldwide-a-prospective-cohort-study
#1
Federico Coccolini, Mattia Trevisan, Giulia Montori, Massimo Sartelli, Fausto Catena, Marco Ceresoli, Antonio Costanzo, Arianna Heyer, Luca Ansaloni
BACKGROUND: Complicated diverticulitis (CD) is a common problem for surgeons. In treating it, as a general principle, every verified source of infection should be controlled. Supplementary antimicrobial management involves a delicate balance of optimizing empirical therapy while reducing unnecessary antibiotic use. The necessity to know the most frequent infecting pathogens and their spectra of resistance is becoming pivotal. The aim of this study was to determine the microbiologic profile of complicated intra-abdominal infections (IAIs) secondary to CD, to analyze the role of empirical antimicrobial therapy, and to describe the clinical aspects of CD worldwide...
July 21, 2017: Surgical Infections
https://www.readbyqxmd.com/read/28730548/orthopedic-infections-caused-by-obligatory-anaerobic-gram-negative-rods-report-of-two-cases
#2
Marta Kierzkowska, Piotr Pedzisz, Ireneusz Babiak, Jakub Janowicz, Mateusz Kulig, Anna Majewska, Anna Sawicka-Grzelak, Grazyna Mlynarczyk
Anaerobic bone and joint infections are uncommon, although the number of anaerobic infections is presumably underestimated because of difficulties with isolation and identification of obligate anaerobes. This study describes two cases of complicated Bacteroides fragilis peri-implant infection of the lumbar spine, infection of the hip and osteomyelitis. Bacteria were identified with the use of a mass spectrometer, VITEK MS system. Drug susceptibility was performed with the use of E-test. The EUCAST breakpoints were used for interpretation with B...
July 20, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28730370/the-n-terminal-and-central-domain-of-colicin-a-enables-phage-lysin-to-lyse-escherichia-coli-extracellularly
#3
Guangmou Yan, Jianfang Liu, Qiang Ma, Rining Zhu, Zhimin Guo, Chencheng Gao, Shuang Wang, Ling Yu, Jingmin Gu, Dongliang Hu, Wenyu Han, Rui Du, Junling Yang, Liancheng Lei
Multidrug-resistant Escherichia coli has seriously threatened antibiotic resources and international public health. Bacteriophage lysin preparations have been widely considered as valid agents for solving multidrug resistances. Many lysins have been derived to treat diseases caused by Gram-positive bacteria, but only a few lysin preparations have been found that successively treat diseases caused by Gram-negative bacteria. The outer membrane of Gram-negative bacteria effectively blocks the interactions between peptidoglycan in the periplasmic space and bacteriophage lysins, which therefore hampers the antimicrobial effects of bacteriophage lysins...
July 20, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28729206/antimicrobial-resistance-patterns-of-gram-negative-bacteria-isolated-from-bloodstream-infections-in-an-iranian-referral-pediatric-hospital-a-six-year-study
#4
Shima Mahmoudi, Masoumeh Mahzari, Maryam Banar, Babak Pourakbari, Mohammad Taghi Haghi Ashtiani, Mohsen Mohammadi, Sepideh Keshavarz Valian, Setareh Mamishi
INTRODUCTION: Bloodstream infections (BSIs) are considered as a major cause of morbidity and mortality in children all over the world. The aim of this study was to describe the epidemiology and antimicrobial resistance patterns of Gram-negative bacteria (GNB) isolated from bloodstream infections (BSIs) in children admitted to the Children Medical Center Hospital (CMC), Tehran, Iran. METHODS: Clinical and microbiological data of the patients with positive blood cultures was collected from March 2011 to September 2016...
July 17, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28728202/-pyogenic-liver-abscess-changes-of-organisms-and-consequences-for-diagnosis-and-therapy
#5
Alexander Mischnik, Winfried Vincenz Kern, Robert Thimme
Liver abscess is a rare but potentially fatal disease with mortality rates of 2 - 12 %. The spectrum of causative microorganisms varies across the world and is changing due to increasing worldwide travel activity. As a result, previously less frequent pathogens must increasingly be considered in the differential diagnosis. The most common pathogens of liver abscess are so-called abscess streptococci, anaerobes and Gram-negative bacteria such as Escherichia coli and Klebsiella pneumoniae. Certain clones among the Gram-negatives, typically among Klebsiella spp...
July 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28727741/antimicrobial-resistance-rates-in-gram-positive-bacteria-do-not-drive-glycopeptides-use
#6
Beryl Primrose Gladstone, Andrea Cona, Parichehr Shamsrizi, Tuba Vilken, Winfred V Kern, Nisar Malek, Evelina Tacconelli
Surveillance data are considered essential to appropriate empiric antibiotic therapy and stewardship. The objective of this study was to determine if a change in the rates of antibiotic resistance impacts antibiotic use in European hospitals. Glycopeptides use was selected to study the correlation between resistance rates and antibiotic use because of the restricted spectrum against resistant gram positive bacteria. PubMed, ECDC databases and national/regional surveillance systems were searched to identify glycopeptides´ consumption in defined daily dose per 1000 inhabitant-days (DID) and rate of methicillin-resistant Staphylococcus aureus (MRSA), methicillin-resistant coagulase negative staphylococci (MRCoNS), and vancomycin-resistant enterococci (VRE) in bloodstream infections (BSIs) in European countries between 1997 and 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28725638/isolation-of-f-novicida-containing-phagosome-from-infected-human-monocyte-derived-macrophages
#7
Valentina Marecic, Olga Shevchuk, Mateja Ozanic, Mirna Mihelcic, Michael Steinert, Antonija Jurak Begonja, Yousef Abu Kwaik, Marina Santic
Francisella is a gram-negative bacterial pathogen, which causes tularemia in humans and animals. A crucial step of Francisella infection is its invasion of macrophage cells. Biogenesis of the Francisella-containing phagosome (FCP) is arrested for ~15 min at the endosomal stage, followed by gradual bacterial escape into the cytosol, where the microbe proliferates. The crucial step in pathogenesis of tularemia is short and transient presence of the bacterium within phagosome. Isolation of FCPs for further studies has been challenging due to the short period of time of bacterial residence in it and the characteristics of the FCP...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28725560/haemophilus-influenzae-serotype-f-endocarditis-and-septic-arthritis
#8
Katerina Oikonomou, Basel Alhaddad, Kayla Kelly, Ravindra Rajmane, George Apergis
Haemophilus influenzae represents gram-negative coccobacilli which can cause endocarditis, meningitis, septicemia, pneumonia, septic arthritis. H.influenzae exists as encapsulated and unencapsulated (non-typeable) strains. Non-typeable H.influenzae are emerging pathogens especially in elderly population. We report a case of a 73 year old woman with bacteremia, endocarditis and septic arthritis due to H.influenzae serotype f. This case emphasizes the clinical features and the key elements of diagnosis and management of infections caused by non-typeable strains of H...
2017: IDCases
https://www.readbyqxmd.com/read/28725559/a-case-of-klebsiella-oxytoca-endocarditis-in-an-intravenous-drug-user
#9
Naomi Hauser, Elizabeth Tanner, Michael Keuroghlian, Lalitha Koduri
Non-HACEK Gram-negative bacilli account for only a small percentage of infective endocarditis cases globally. Among those, Klebsiella species account for only about 10% of cases and are most often health-care acquired. We present a rare case of Klebsiella oxytoca endocarditis in a young intravenous drug user.
2017: IDCases
https://www.readbyqxmd.com/read/28724927/dual-functionality-nanobioconjugates-targeting-intracellular-bacteria-in-cancer-cells-with-enhanced-antimicrobial-activity
#10
Rohini Singh, Smita Patil, Neetu Singh, Shalini Gupta
Bacterial drug resistance has emerged as a serious global threat mandating the development of novel methodologies that allow facile modulation of antimicrobial action in a controlled fashion. Conjugating antibiotics to nanoparticles helps to meet this goal by increasing the drug's overall avidity, bioavailability and easier internalisation into mammalian cells, targeting bacteria that otherwise escape antibacterial action by host cell-localisation. We used polymyxin B sulfate (PMB) and sushi peptide as model drugs against Gram-negative bacteria and established their enhanced antimicrobial activity on Escherichia coli (E...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28724376/sonication-contribution-to-identifying-prosthetic-joint-infection-with-ralstonia-pickettii-a-case-report-and-review-of-the-literature
#11
Rares Mircea Birlutiu, Mihai Dan Roman, Razvan Silviu Cismasiu, Sorin Radu Fleaca, Crina Maria Popa, Manuela Mihalache, Victoria Birlutiu
BACKGROUND: In the context of an increase number of primary and revision total hip and total knee arthroplasty performed yearly, an increased risk of complication is expected. Prosthetic joint infection (PJI) remains the most common and feared arthroplasty complication. Ralstonia pickettii is a Gram-negative bacterium, that has also been identified in biofilms. It remains an extremely rare cause of PJI. There is no report of an identification of R. pickettii on an extracted spacer loaded with antibiotic...
July 19, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28723951/cd8-t-cells-provide-immune-protection-against-murine-disseminated-endotheliotropic-orientia-tsutsugamushi-infection
#12
Guang Xu, Nicole L Mendell, Yuejin Liang, Thomas R Shelite, Yenny Goez-Rivillas, Lynn Soong, Donald H Bouyer, David H Walker
Scrub typhus, caused by a Gram-negative obligately intracellular coccobacillus, Orientia tsutsugamushi, is a long neglected but important tropical disease. Orientia tsutsugamushi causes illness in one million people each year, and 1 billion people are at risk. Without appropriate diagnosis and treatment, the disease can cause severe multiorgan failure with a case fatality rate of 7-15%. The current gaps in knowledge of immunity include the unknown mechanisms of host immunity to O. tsutsugamushi. Using an intravenous (i...
July 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28723950/high-affinity-anti-tim-3-and-anti-kir-monoclonal-antibodies-cloned-from-healthy-human-individuals
#13
Stefan Ryser, Angeles Estellés, Edgar Tenorio, Lawrence M Kauvar, Mikhail L Gishizky
We report here the cloning of native high affinity anti-TIM-3 and anti-KIR IgG monoclonal antibodies (mAbs) from peripheral blood mononuclear cells (PBMC) of healthy human donors. The cells that express these mAbs are rare, present at a frequency of less than one per 105 memory B-cells. Using our proprietary multiplexed screening and cloning technology CellSpot™ we assessed the presence of memory B-cells reactive to foreign and endogenous disease-associated antigens within the same individual. When comparing the frequencies of antigen-specific memory B-cells analyzed in over 20 screening campaigns, we found a strong correlation of the presence of anti-TIM-3 memory B-cells with memory B-cells expressing mAbs against three disease-associated antigens: (i) bacterial DNABII proteins that are a marker for Gram negative and Gram positive bacterial infections, (ii) hemagglutinin (HA) of influenza virus and (iii) the extracellular domain of anaplastic lymphoma kinase (ALK)...
2017: PloS One
https://www.readbyqxmd.com/read/28723468/trends-in-antibiotic-resistance-in-urologic-practice
#14
REVIEW
Hala Kandil, Emma Cramp, Tejal Vaghela
CONTEXT: The significant global upsurge in antimicrobial resistance, particularly among Enterobacteriaceae, represents a serious threat to health care systems. The implications for urologic practice are of particular concern. OBJECTIVE: To review trends in antibiotic resistance in urologic practice. EVIDENCE ACQUISITION: We report current European trends of resistance in Gram-negative uropathogens. EVIDENCE SYNTHESIS: In addition to β-lactam resistance, Gram-negative pathogens are often resistant to multiple drug classes, including aminoglycosides, fluoroquinolones, and carbapenems, commonly used to treat urologic infections...
October 2016: European Urology Focus
https://www.readbyqxmd.com/read/28721352/detection-of-mcr-1-carrying-escherichia-coli-causing-bloodstream-infection-in-a-new-york-city-hospital-avian-origins-human-concerns
#15
Nenad Macesic, Daniel Green, Zheng Wang, Sean B Sullivan, Kevin Shim, Sarah Park, Susan Whittier, E Yoko Furuya, Angela Gomez-Simmonds, Anne-Catrin Uhlemann
The spread of mcr-1 in the United States remains poorly defined. mcr-1-producing Escherichia coli that also carried blaSHV-12 was detected in a hospitalized patient. No additional cases were identified during screening of 801 Gram-negative isolates. Genomic sequencing identified an IncX4 mcr-1- harboring plasmid and ST117 clonal background associated with avian pathogenic E coli.
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28721045/synthesis-construction-and-evaluation-of-self-assembled-nano-bacitracin-a-as-an-efficient-antibacterial-agent-in-vitro-and-in-vivo
#16
Wei Hong, Xiang Gao, Peng Qiu, Jie Yang, Mingxi Qiao, Hong Shi, Dexian Zhang, Chunlian Tian, Shengli Niu, Mingchun Liu
Bacitracin A (BA) is an excellent polypeptide antibiotic that is active against gram-positive bacteria without triggering multidrug resistance. However, BA is inactive against gram-negative bacteria because of its inability to cross the outer membrane of these cells, and it has strong nephrotoxicity, thus limiting its clinical applications. Nanoantibiotics can effectively localize antibiotics to the periplasmic space of bacteria while decreasing the adverse effects of antibiotics. In this study, biodegradable hydrophobic copolymers of poly (d,l-lactide-co-glycolide) (PLGA) were attached to the N-termini of BA to design a novel class of self-assembled nano-bacitracin A (nano-BAs), and their potential as antibacterial agents was evaluated in vitro and in vivo...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28721014/determining-optimal-dosing-regimen-of-oral-administration-of-dicloxacillin-using-monte-carlo-simulation
#17
Wei Yu, Jinru Ji, Tingting Xiao, Chaoqun Ying, Jiaheng Fang, Ping Shen, Yonghong Xiao
BACKGROUND: Dicloxacillin, a semisynthetic isoxazolyl penicillin, exhibits antimicrobial activity against a wide variety of Gram-positive bacteria, as well as stability against penicillinases and low level of toxicity. The objective of this study was to obtain optimal dosing regimen of oral administration of dicloxacillin by analyzing the pharmacokinetic (PK) index in healthy volunteers and in vitro antibacterial activity by using Monte Carlo simulation. MATERIALS AND METHODS: A total of 867 clinical isolates from community-onset infections were collected from 31 secondary hospitals in People's Republic of China...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28720734/lack-of-acrb-efflux-function-confers-loss-of-virulence-on-salmonella-enterica-serovar-typhimurium
#18
Xuan Wang-Kan, Jessica M A Blair, Barbara Chirullo, Jonathan Betts, Roberto M La Ragione, Alasdair Ivens, Vito Ricci, Timothy J Opperman, Laura J V Piddock
AcrAB-TolC is the paradigm resistance-nodulation-division (RND) multidrug resistance efflux system in Gram-negative bacteria, with AcrB being the pump protein in this complex. We constructed a nonfunctional AcrB mutant by replacing D408, a highly conserved residue essential for proton translocation. Western blotting confirmed that the AcrB D408A mutant had the same native level of expression of AcrB as the parental strain. The mutant had no growth deficiencies in rich or minimal medium. However, compared with wild-type SL1344, the mutant had increased accumulation of Hoechst 33342 dye and decreased efflux of ethidium bromide and was multidrug hypersusceptible...
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
#19
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/28719654/vibrio-vulnificus-induces-mtor-activation-and-inflammatory-responses-in-macrophages
#20
Dan-Li Xie, Meng-Meng Zheng, Yi Zheng, Hui Gao, Jie Zhang, Ting Zhang, Jian-Chun Guo, X Frank Yang, Xiao-Ping Zhong, Yong-Liang Lou
Vibrio vulnificus (V. vulnificus), a Gram-negative marine bacterium, can cause life-threatening primary septicemia, especially in patients with liver diseases. How V. vulnificus affects the liver and how it acts on macrophages are not well understood. In this report, we demonstrated that V. vulnificus infection causes a strong inflammatory response, marked expansion of liver-resident macrophages, and liver damage in mice. We demonstrated further that V. vulnificus activates mTOR in macrophages and inhibition of mTOR differentially regulates V...
2017: PloS One
keyword
keyword
42575
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"