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Urinary tract infection and enterococcus endocarditis

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https://www.readbyqxmd.com/read/29396199/clinical-management-of-non-faecium-non-faecalis-vancomycin-resistant-enterococci-infection-focus-on-enterococcus-gallinarum-and-enterococcus-casseliflavus-flavescens
#1
REVIEW
Jacopo Monticelli, Anna Knezevich, Roberto Luzzati, Stefano Di Bella
Enterococcus gallinarum and Enterococcus casseliflavus/flavescens are enterococci intrinsically resistant to vancomycin belonging to the E. gallinarum group. They are responsible mainly for healthcare-associated infections, in particular bloodstream, urinary tract and surgical wound infections. Diseases due to these bacteria are significantly increasing worldwide, as they are prone to cause infection in patients with concurrent hepatobiliary or oncohematological disorders. Along with their distinguishing vancomycin resistance, due to a chromosomally-encoded VanC operon, their additional intrinsic resistance to many antibiotics other than glycopeptides limits the therapeutic choices...
January 30, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29147662/effectiveness-of-a-lytic-phage-srg1-against-vancomycin-resistant-enterococcus-faecalis-in-compost-and-soil
#2
Sidra Rahmat Ullah, Saadia Andleeb, Taskeen Raza, Muhsin Jamal, Khalid Mehmood
Nosocomial infections caused by vancomycin-resistant Enterococcus have become a major problem. Bacteriophage therapy is proposed as a potential alternative therapy. Bacteriophages are viruses that infect bacteria and are ubiquitous in nature. Lytic bacteriophage was isolated from sewage water that infects VREF, the causative agent of endocarditis, bacteraemia, and urinary tract infections (UTIs). The phage produced clear plaques with unique clear morphology and well-defined boundaries. TEM results of phage revealed it to be 108 ± 0...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29059358/daptomycin
#3
Mohsen Heidary, Azar Dohkt Khosravi, Saeed Khoshnood, Mohammad Javad Nasiri, Saleh Soleimani, Mehdi Goudarzi
Daptomycin is a cyclic lipopeptide antibiotic used for the treatment of Gram-positive infections including complicated skin and skin structure infections, right-sided infective endocarditis, bacteraemia, meningitis, sepsis and urinary tract infections. Daptomycin has distinct mechanisms of action, disrupting multiple aspects of cell membrane function and inhibiting protein, DNA and RNA synthesis. Although daptomycin resistance in Gram-positive bacteria is uncommon, there are increasing reports of daptomycin resistance in Staphylococcus aureus, Enterococcus faecium and Enterococcus faecalis...
October 20, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28811943/reviewing-the-emergence-of-lactococcus-garvieae-a-case-of-catheter-associated-urinary-tract-infection-caused-by-lactococcus-garvieae-and-escherichia-coli-coinfection
#4
Tatvam T Choksi, Farhan Dadani
Lactococcus garvieae is considered a low virulence organism which is rarely associated with human infections. Most of the reported cases have been associated with bacteremia with or without endocarditis. We report a rare case of catheter associated urinary tract infection (CAUTI) caused by Lactococcus garvieae and Escherichia coli coinfection without any bacteremia in a patient with indwelling urinary catheter placed for benign prostatic hyperplasia (BPH). The patient also had a history of gastroesophageal reflux disease (GERD) with long standing famotidine treatment...
2017: Case Reports in Infectious Diseases
https://www.readbyqxmd.com/read/28670302/prevalence-and-genetic-diversity-of-enterococcus-faecalis-isolates-from-mineral-water-and-spring-water-in-china
#5
Lei Wei, Qingping Wu, Jumei Zhang, Weipeng Guo, Moutong Chen, Liang Xue, Juan Wang, Lianying Ma
Enterococcus faecalis is an important opportunistic pathogen which is frequently detected in mineral water and spring water for human consumption and causes human urinary tract infections, endocarditis and neonatal sepsis. The aim of this study was to determine the prevalence, virulence genes, antimicrobial resistance and genetic diversity of E. faecalis from mineral water and spring water in China. Of 314 water samples collected from January 2013 to January 2014, 48 samples (15.3%) were contaminated E. faecalis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28439299/substance-p-enhances-lactic-acid-and-tyramine-production-in-enterococcus-faecalis-v583-and-promotes-its-cytotoxic-effect-on-intestinal-caco-2-tc7-cells
#6
Kelly Biaggini, Valérie Borrel, Sabine Szunerits, Rabah Boukherroub, Awa N'Diaye, Arthur Zébré, Maryse Bonnin-Jusserand, Guillaume Duflos, Marc Feuilloley, Djamel Drider, Pierre Déchelotte, Nathalie Connil
BACKGROUND: Enterococcus faecalis, generally considered as a saprophytic bowel commensal, has recently emerged as an important nosocomial pathogen causing severe urinary tract infections, surgical wound infections, bacteremia, and bacterial endocarditis. This bacterium is capable of forming biofilms on various surfaces and its high level of antibiotic resistance contributes to its pathogenicity. The aim of this study was to evaluate the effect on E. faecalis, of Substance P (SP), an antimicrobial peptide that is produced in the gut and skin...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28102784/model-systems-for-the-study-of-enterococcal-colonization-and-infection
#7
H M Sharon Goh, M H Adeline Yong, Kelvin Kian Long Chong, Kimberly A Kline
Enterococcus faecalis and Enterococcus faecium are common inhabitants of the human gastrointestinal tract, as well as frequent opportunistic pathogens. Enterococci cause a range of infections including, most frequently, infections of the urinary tract, catheterized urinary tract, bloodstream, wounds and surgical sites, and heart valves in endocarditis. Enterococcal infections are often biofilm-associated, polymicrobial in nature, and resistant to antibiotics of last resort. Understanding Enterococcal mechanisms of colonization and pathogenesis are important for identifying new ways to manage and intervene with these infections...
January 19, 2017: Virulence
https://www.readbyqxmd.com/read/27979420/procalcitonin-levels-in-bloodstream-infections-caused-by-different-sources-and-species-of-bacteria
#8
Sheng Tao Yan, Li Chao Sun, Hong Bing Jia, Wen Gao, Jian Ping Yang, Guo Qiang Zhang
OBJECTIVE: The aim of this study was to evaluate procalcitonin (PCT) diagnostic accuracy in discriminating gram-negative (GN) from gram-positive (GP) bloodstream infections and determining the relationship between PCT levels, infection sites, and pathogen types. METHODS: Clinical and laboratory data were collected from patients with blood culture (BC)-positive sepsis between January 2014 and December 2015. PCT levels at different infection sites were compared, as was the presence of GN and GP bloodstream infection...
April 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/27617012/dispersion-of-the-vancomycin-resistance-genes-vana-and-vanc-of-enterococcus-isolated-from-nile-tilapia-on-retail-sale-a-public-health-hazard
#9
Kamelia M Osman, Mohamed N Ali, Ismail Radwan, Fatma ElHofy, Ahmed H Abed, Ahmed Orabi, Nehal M Fawzy
Although normally regarded harmless commensals, enterococci may cause a range of different infections in humans, including urinary tract infections, sepsis, and endocarditis. The acquisition of vancomycin resistance by enterococci (VRE) has seriously affected the treatment and infection control of these organisms. VRE are frequently resistant to all antibiotics that are effective treatment for vancomycin-susceptible enterococci, which leaves clinicians treating VRE infections with limited therapeutic options...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/26930703/role-of-the-emp-pilus-subunits-of-enterococcus-faecium-in-biofilm-formation-adherence-to-host-extracellular-matrix-components-and-experimental-infection
#10
Maria Camila Montealegre, Kavindra V Singh, Sudha R Somarajan, Puja Yadav, Chungyu Chang, Robert Spencer, Jouko Sillanpää, Hung Ton-That, Barbara E Murray
Enterococcus faecium is an important cause of hospital-associated infections, including urinary tract infections (UTIs), bacteremia, and infective endocarditis. Pili have been shown to play a role in the pathogenesis of Gram-positive bacteria, including E. faecium We previously demonstrated that a nonpiliated ΔempABC::cat derivative of E. faecium TX82 was attenuated in biofilm formation and in a UTI model. Here, we studied the contributions of the individual pilus subunits EmpA, EmpB, and EmpC to pilus architecture, biofilm formation, adherence to extracellular matrix (ECM) proteins, and infection...
May 2016: Infection and Immunity
https://www.readbyqxmd.com/read/26351286/the-fibronectin-binding-protein-efba-contributes-to-pathogenesis-and-protects-against-infective-endocarditis-caused-by-enterococcus-faecalis
#11
Kavindra V Singh, Sabina Leanti La Rosa, Sudha R Somarajan, Jung Hyeob Roh, Barbara E Murray
EfbA is a PavA-like fibronectin adhesin of Enterococcus faecalis previously shown to be important in experimental urinary tract infection. Here, we expressed and purified the E. faecalis OG1RF EfbA and confirmed that this protein binds with high affinity to immobilized fibronectin, collagen I, and collagen V. We constructed an efbA deletion mutant and demonstrated that its virulence was significantly attenuated (P < 0.0006) versus the wild type in a mixed inoculum rat endocarditis model. Furthermore, efbA deletion resulted in diminished ability to bind fibronectin (P < 0...
December 2015: Infection and Immunity
https://www.readbyqxmd.com/read/26244026/vancomycin-resistant-enterococcal-infections-epidemiology-clinical-manifestations-and-optimal-management
#12
REVIEW
Tristan O'Driscoll, Christopher W Crank
Since its discovery in England and France in 1986, vancomycin-resistant Enterococcus has increasingly become a major nosocomial pathogen worldwide. Enterococci are prolific colonizers, with tremendous genome plasticity and a propensity for persistence in hospital environments, allowing for increased transmission and the dissemination of resistance elements. Infections typically present in immunosuppressed patients who have received multiple courses of antibiotics in the past. Virulence is variable, and typical clinical manifestations include bacteremia, endocarditis, intra-abdominal and pelvic infections, urinary tract infections, skin and skin structure infections, and, rarely, central nervous system infections...
2015: Infection and Drug Resistance
https://www.readbyqxmd.com/read/26150452/public-health-risks-of-multiple-drug-resistant-enterococcus-spp-in-southeast-asia
#13
REVIEW
Diane Sunira Daniel, Sui Mae Lee, Gary A Dykes, Sadequr Rahman
Enterococci rank as one of the leading causes of nosocomial infections, such as urinary tract infections, surgical wound infections, and endocarditis, in humans. These infections can be hard to treat because of the rising incidence of antibiotic resistance. Enterococci inhabiting nonhuman reservoirs appear to play a critical role in the acquisition and dissemination of antibiotic resistance determinants. The spread of antibiotic resistance has become a major concern in both human and veterinary medicine, especially in Southeast Asia, where many developing countries have poor legislation and regulations to control the supply and excessive use of antimicrobials...
September 2015: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/26076451/evaluation-of-the-enterococcus-faecalis-biofilm-associated-virulence-factors-ahrc-and-eep-in-rat-foreign-body-osteomyelitis-and-in-vitro-biofilm-associated-antimicrobial-resistance
#14
Kristi L Frank, Paschalis Vergidis, Cassandra L Brinkman, Kerryl E Greenwood Quaintance, Aaron M T Barnes, Jayawant N Mandrekar, Patrick M Schlievert, Gary M Dunny, Robin Patel
Enterococcus faecalis can cause healthcare-associated biofilm infections, including those of orthopedic devices. Treatment of enterococcal prosthetic joint infection is difficult, in part, due to biofilm-associated antimicrobial resistance. We previously showed that the E. faecalis OG1RF genes ahrC and eep are in vitro biofilm determinants and virulence factors in animal models of endocarditis and catheter-associated urinary tract infection. In this study, we evaluated the role of these genes in a rat acute foreign body osteomyelitis model and in in vitro biofilm-associated antimicrobial resistance...
2015: PloS One
https://www.readbyqxmd.com/read/25915650/proteomic-investigation-of-the-response-of-enterococcus-faecalis-v583-when-cultivated-in-urine
#15
Magnus Øverlie Arntzen, Ingrid Lea Karlskås, Morten Skaugen, Vincent G H Eijsink, Geir Mathiesen
Enterococcus faecalis is a robust bacterium, which is able to survive in and adapt to hostile environments such as the urinary tract and bladder. In this label-free quantitative proteomic study based on MaxQuant LFQ algorithms, we identified 127 proteins present in the secretome of the clinical vancomycin-resistant isolate E. faecalis V583 and we compared proteins secreted in the initial phase of cultivation in urine with the secretome during cultivation in standard laboratory medium, 2xYT. Of the 54 identified proteins predicted to be secreted, six were exclusively found after cultivation in urine including the virulence factor EfaA ("endocarditis specific antigen") and its homologue EF0577 ("adhesion lipoprotein")...
2015: PloS One
https://www.readbyqxmd.com/read/25657162/molecular-characterization-of-enterococcus-spp-clinical-isolates-from-cairo-egypt
#16
Y A Hashem, A S Yassin, M A Amin
PURPOSE: Enterococci are responsible for serious diseases such as bacteraemia, endocarditis and urinary tract infections. The ability of enterococci to cause such diseases is due to acquisition of certain virulence factors such as haemolysin, gelatinase and enterococcus surface protein. This study has been conducted to investigate the occurrence of virulence factors and resistance to various antibiotics with emphasis on vancomycin in the Enterococcus spp. MATERIALS AND METHODS: Clinical specimens were collected and isolates were identified by proper microscopic, culture and biochemical tests...
February 2015: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/25385790/the-two-component-system-grvrs-etars-regulates-ace-expression-in-enterococcus-faecalis-og1rf
#17
Jung Hyeob Roh, Kavindra V Singh, Sabina Leanti La Rosa, Ana Luisa V Cohen, Barbara E Murray
Expression of ace (adhesin to collagen of Enterococcus faecalis), encoding a virulence factor in endocarditis and urinary tract infection models, has been shown to increase under certain conditions, such as in the presence of serum, bile salts, urine, and collagen and at 46 °C. However, the mechanism of ace/Ace regulation under different conditions is still unknown. In this study, we identified a two-component regulatory system GrvRS as the main regulator of ace expression under these stress conditions. Using Northern hybridization and β-galactosidase assays of an ace promoter-lacZ fusion, we found transcription of ace to be virtually absent in a grvR deletion mutant under the conditions that increase ace expression in wild-type OG1RF and in the complemented strain...
January 2015: Infection and Immunity
https://www.readbyqxmd.com/read/25296179/a-novel-role-for-d-alanylation-of-lipoteichoic-acid-of-enterococcus-faecalis-in-urinary-tract-infection
#18
Dominique Wobser, Liaqat Ali, Elisabeth Grohmann, Johannes Huebner, Türkan Sakinc
BACKGROUND: Enterococci are the third most common cause of healthcare-associated infections, which include urinary tract infections, bacteremia and endocarditis. Cell-surface structures such as lipoteichoic acid (LTA) have been poorly examined in E. faecalis, especially with respect to urinary tract infections (UTIs). The dlt operon is responsible for the D-alanylation of LTA and includes the gene dltA, which encodes the D-alanyl carrier protein ligase (Dcl). The involvement of LTA in UTI infection by E...
2014: PloS One
https://www.readbyqxmd.com/read/25232179/ebpa-vaccine-antibodies-block-binding-of-enterococcus-faecalis-to-fibrinogen-to-prevent-catheter-associated-bladder-infection-in-mice
#19
Ana L Flores-Mireles, Jerome S Pinkner, Michael G Caparon, Scott J Hultgren
Enterococci bacteria are a frequent cause of catheter-associated urinary tract infections, the most common type of hospital-acquired infection. Treatment has become increasingly challenging because of the emergence of multiantibiotic-resistant enterococcal strains and their ability to form biofilms on catheters. We identified and targeted a critical step in biofilm formation and developed a vaccine that prevents catheter-associated urinary tract infections in mice. In the murine model, formation of catheter-associated biofilms by Enterococcus faecalis depends on EbpA, which is the minor subunit at the tip of a heteropolymeric surface fiber known as the endocarditis- and biofilm-associated pilus (Ebp)...
September 17, 2014: Science Translational Medicine
https://www.readbyqxmd.com/read/25007507/-antibiotic-resistance-and-siderophore-production-in-enterococci
#20
Paweł Lisiecki
INTRODUCTION: Enterococci belong to the normal bacterial flora of the gastrointensinal tract of humans. Enterococci are regarded as harmless commensal, and are even believed to have probiotic characteristics. However, they can cause variety of infections, including endocarditis, bloodstream infections and urinary tract infections. During the past several decades, enterococci, and particularly Enterococcus faecalis and E. faecium, have been identified as an important cause of nosocomial infections...
2014: Medycyna Doświadczalna i Mikrobiologia
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