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https://www.readbyqxmd.com/read/28545827/validation-of-the-korean-national-healthcare-associated-infections-surveillance-system-konis-an-intensive-care-unit-module-report
#1
Y G Kwak, J Y Choi, H M Yoo, S-O Lee, H B Kim, S H Han, H J Choi, S R Kim, T H Kim, H K Chun, H-S Koo
BACKGROUND: National surveillance data should be validated to identify methodological problems within the surveillance programme and data quality issues. AIM: To test the validity of healthcare-associated infection (HAI) rate data from the Korean National Healthcare-associated Infections Surveillance System (KONIS). METHODS: Records from intensive care units of 12 (14.8%) of 81 participating hospitals for January-March 2014 were examined. The validation team reviewed 406 medical records of 110 patients with 114 reported HAIs - including 34 urinary tract infections (UTIs), 57 bloodstream infections (BSIs) and 23 cases of pneumonia (PNEU) - and 296 patients with no reported HAIs during one-day visits conducted in August and September 2014...
April 8, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28545671/trypanosuppresive-effects-of-ellagic-acid-and-amelioration-of-the-trypanosome-associated-pathological-features-coupled-with-inhibitory-effects-on-trypanosomal-sialidase-in-vitro-and-in-silico
#2
Raphael Aminu, Mohammed Auwal Ibrahim, Md Atiar Rahman, Raju Dash, Ismaila Alhaji Umar
BACKGROUND: The search for novel antitrypanosomal agents had previously led to the isolation of ellagic acid as a bioactive antitrypanosomal compound using in vitro studies. However, it is not known whether this compound will elicit antitrypanosomal activity in in vivo condition which is usually the next step in the drug discovery process. PURPOSE: Herein, we investigated the in vivo activity of ellagic acid against bloodstream form of Trypanosoma congolense and its ameliorative effects on trypanosome-induced anemia and organ damage as well as inhibitory effects on trypanosomal sialidase...
July 1, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28543785/phenotypic-and-genotypic-characteristics-of-candida-albicans-isolates-from-bloodstream-and-mucosal-infections
#3
Marina Mandelblat, Michael Frenkel, Darren Abbey, Ronen Ben Ami, Judith Berman, Esther Segal
The interaction of Candida albicans with the host is of a complex nature involving fungal factors and host's response. In this study, we concentrated on the phenotypic expression of virulence attributes and genotypic characteristics of C. albicans isolates from two distinct clinical entities of candidiasis-blood stream and vaginal infections, and the possible role of these factors. Hence, we conducted a comparative in vitro assessment of virulence characteristics, including adhesion to epithelial cells and HaCat cell line, biofilm formation, aspartic proteinases and phospholipase activity of 20 C...
May 22, 2017: Mycoses
https://www.readbyqxmd.com/read/28542614/evaluation-of-the-sepsis-flow-chip-assay-for-the-diagnosis-of-blood-infections
#4
Antonio Galiana, Javier Coy, Adelina Gimeno, Noemi Marco Guzman, Francisco Rosales, Esperanza Merino, Gloria Royo, Juan Carlos Rodríguez
BACKGROUND: Blood infections are serious complex conditions that generally require rapid diagnosis and treatment. The big challenge is to reduce the time necessary to make a diagnosis with current clinical microbiological methods so as to improve the treatment given to patients. METHODS: In this study, we assess for the first time the Sepsis Flow Chip assay, which is a novel diagnostic assay for simultaneous rapid-detection of the vast majority of bloodstream pathogens, including Gram-positive and Gram-negative bacteria and fungi, in the same assay, and for the detection of most common antibiotic resistance genes...
2017: PloS One
https://www.readbyqxmd.com/read/28539453/epigenetic-metabolite-acetate-inhibits-class-i-ii-histone-deacetylases-promotes-histone-acetylation-and-increases-hiv-1-integration-in-cd4-t-cells
#5
Jean-François Bolduc, Laurent Hany, Corinne Barat, Michel Ouellet, Michel J Tremblay
In this study, we investigated the effect of acetate, the most concentrated short-chain fatty acid (SCFA) in the gut and bloodstream, on the susceptibility of primary human CD4(+) T cells to HIV-1 infection. We report that HIV-1 replication is increased in CD3/CD28-costimulated CD4(+) T cells upon acetate treatment. This enhancing effect correlates with an increased expression of the early activation marker CD69 and impaired class I/II histone deacetylase (HDAC) activity. In addition, acetate enhances acetylation of histones H3 and H4 and augments HIV-1 integration in the genome of CD4(+) T cells...
May 24, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28536292/capsule-production-and-glucose-metabolism-dictate-fitness-during-serratia-marcescens-bacteremia
#6
Mark T Anderson, Lindsay A Mitchell, Lili Zhao, Harry L T Mobley
Serratia marcescens is an opportunistic pathogen that causes a range of human infections, including bacteremia, keratitis, wound infections, and urinary tract infections. Compared to other members of the Enterobacteriaceae family, the genetic factors that facilitate Serratia proliferation within the mammalian host are less well defined. An in vivo screen of transposon insertion mutants identified 212 S. marcescens fitness genes that contribute to bacterial survival in a murine model of bloodstream infection...
May 23, 2017: MBio
https://www.readbyqxmd.com/read/28536290/peptidoglycan-association-of-murein-lipoprotein-is-required-for-kpsd-dependent-group-2-capsular-polysaccharide-expression-and-serum-resistance-in-a-uropathogenic-escherichia-coli-isolate
#7
Jingyu Diao, Catrien Bouwman, Donghong Yan, Jing Kang, Anand K Katakam, Peter Liu, Homer Pantua, Alexander R Abbas, Nicholas N Nickerson, Cary Austin, Mike Reichelt, Wendy Sandoval, Min Xu, Chris Whitfield, Sharookh B Kapadia
Murein lipoprotein (Lpp) and peptidoglycan-associated lipoprotein (Pal) are major outer membrane lipoproteins in Escherichia coli Their roles in cell-envelope integrity have been documented in E. coli laboratory strains, and while Lpp has been linked to serum resistance in vitro, the underlying mechanism has not been established. Here, lpp and pal mutants of uropathogenic E. coli strain CFT073 showed reduced survival in a mouse bacteremia model, but only the lpp mutant was sensitive to serum killing in vitro The peptidoglycan-bound Lpp form was specifically required for preventing complement-mediated bacterial lysis in vitro and complement-mediated clearance in vivo Compared to the wild-type strain, the lpp mutant had impaired K2 capsular polysaccharide production and was unable to respond to exposure to serum by elevating capsular polysaccharide amounts...
May 23, 2017: MBio
https://www.readbyqxmd.com/read/28534703/chlorhexidine-and-silver-sulfadiazine-coating-on-central-venous-catheters-is-not-sufficient-for-protection-against-catheter-related-infection-simulation-based-laboratory-research-with-clinical-validation
#8
Yoon Ji Choi, Jae Kwan Lim, Jeong Jun Park, Hyub Huh, Dong-Joo Kim, Chang-Hoon Gong, Seung Zhoo Yoon
Objective The efficacy of chlorhexidine- and silver sulfadiazine-coated central venous catheters (CSS-CVC) against catheter-related infection remains controversial. We hypothesized that the loss of silver nanoparticles may reduce the antibacterial efficacy of CSS-CVCs and that this loss could be due to the frictional force between the surface of the CVC and the bloodstream. The objective of this study was to investigate whether the antimicrobial effect of CSS-CVCs decreases with increasing exposure time in a bloodstream model and quantitatively assay the antimicrobial effect of CSS-CVCs compared with polyurethane and antiseptic-impregnated CVCs...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28533166/risk-factors-for-30-day-mortality-in-patients-with-methicillin-resistant-staphylococcus-aureus-bloodstream-infections
#9
Pedro Ayau, Ana C Bardossy, Guillermo Sanchez, Ricardo Ortiz, Daniela Moreno, Pamela Hartman, Khulood Rizvi, Tyler C Prentiss, Mary B Perri, Meredith Mahan, Vanthida Huang, Katherine Reyes, Marcus J Zervos
OBJECTIVES: Methicillin-resistant Staphylococcus aureus (MRSA) blood stream infections (BSI) are a major health care problem accounting for a large percentage of nosocomial infections. The aim of this study was to identify risk factors associated with 30-day mortality in patients with MRSA BSI. METHODS: This was a retrospective study performed in Southeast Michigan. Over a 9- year period, total of 1,168 patients were identified with MRSA BSI. Patient demographics and clinical data were retrieved and evaluated using electronic medical health records...
May 19, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28529091/pseudomonas-aeruginosa-bacteraemia-in-patients-with-hematologic-malignancies-risk-factors-treatment-and-outcome
#10
Polydoros Tofas, Michael Samarkos, Evangelia-Theophano Piperaki, Christos Kosmidis, Ioanna-Dionysia Triantafyllopoulou, Maria Kotsopoulou, Aggeliki Pantazatou, Stavroula Perlorentzou, Anastasia Poulli, Maria Vagia, George L Daikos
Our aims were to identify factors associated with Pseudomonas aeruginosa (PA) bloodstream infection (BSI) in patients with hematological malignancies and evaluate the outcome of the affected patients. Consecutive patients with hematological malignancies who developed PA BSI were identified. Subsequently, two case-control studies were performed to evaluate the risk factors (i) for PA BSI and (ii) for carbapenem resistant (CR) PA BSI. Patients' outcome was evaluated at 28 days after the onset of bacteraemia. A total of 64 patients with PA BSI (45 caused by CS and 19 by CR organisms) and 128 without PA BSI were enrolled...
May 11, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28526171/chlorhexidine-gluconate-or-polyhexamethylene-biguanide-disc-dressing-to-reduce-the-incidence-of-central-line-associated-bloodstream-infection-a-feasibility-randomized-controlled-trial-the-clabsi-trial
#11
J Webster, E Larsen, N Marsh, A Choudhury, P Harris, C M Rickard
BACKGROUND: A number of antimicrobial-impregnated discs to prevent central-line-associated bloodstream infection (CLABSI) are marketed but it is unclear which disc is most effective. AIM: To investigate the feasibility and safety of comparing two antimicrobial-impregnated discs to prevent CLABSI. METHODS: A single-centre, parallel group, randomized controlled trial was conducted in a 929-bed tertiary referral hospital. Hospital inpatients requiring a peripherally inserted central catheter were randomized to chlorhexidine gluconate (CHG) or polyhexamethylene biguanide (PHMB) disc dressing group...
April 16, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28525644/risk-factors-and-clinical-outcomes-of-breakthrough-yeast-bloodstream-infections-in-patients-with-hematological-malignancies-in-the-era-of-newer-antifungal-agents
#12
Si-Hyun Kim, Jae-Ki Choi, Sung-Yeon Cho, Hyo-Jin Lee, Sun Hee Park, Su-Mi Choi, Dong-Gun Lee, Jung-Hyun Choi, Jin-Hong Yoo, Jong-Wook Lee
Although yeast bloodstream infections (BSIs) are increasingly being reported in patients with hematological malignancies undergoing antifungal therapy, clinical information regarding breakthrough infections is scarce. The aim of this study was to determine the risk factors for and clinical outcomes of breakthrough yeast BSIs in patients with hematological malignancies in the era of newer antifungal agents. Between 2011 and 2014, all consecutive patients with hematological malignancies who developed yeast BSIs were included in a case-control study wherein breakthrough infections (cases) and de novo infections (controls) were compared...
May 19, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28522363/a-bloodstream-infection-by-ruminococcus-gnavus-in-a-patient-with-a-gall-bladder-perforation
#13
Young Jin Kim, Hee Yoon Kang, Yujin Han, Mi Suk Lee, Hee Joo Lee
Ruminococcus gnavus is frequently found among human gut microbiome. However, human bloodstream infections by R. gnavus have been reported only three times. Clinical details were lacking for one case; the other two cases with concurrent bacteremia in patients with diverticulitis. We report a case of R. gnavus bloodstream infection in a patient with a gall bladder perforation suggesting its association with damage to the gastrointestinal tract. R. gnavus was misidentified using biochemical test but 16S rRNA sequencing and Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry were useful for correct identification...
May 15, 2017: Anaerobe
https://www.readbyqxmd.com/read/28522323/in-vivo-imaging-of-pathogen-homing-to-the-host-tissues
#14
Joana Tavares, David M Costa, Ana Rafaela Teixeira, Anabela Cordeiro-da-Silva, Rogerio Amino
Hematogenous dissemination followed by tissue tropism is a characteristic of the infectious process of many pathogens including those transmitted by blood-feeding vectors. After entering into the blood circulation, these pathogens must arrest in the target organ before they infect a specific tissue. Here, we describe a non-invasive method to visualize and quantify the homing of pathogens to the host tissues. By using in vivo bioluminescence imaging we quantify the accumulation of luciferase-expressing parasites in the host organs during the first minutes following their intravascular inoculation in mice...
May 15, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28514979/determination-of-a-cutoff-time-point-for-prophylactic-exchange-of-central-venous-catheters-for-prevention-of-central-venous-catheter-related-bloodstream-infections-in-patients-with-hematological-malignancies
#15
Enrico Schalk, Lena M Biehl, Jacqueline Färber, Dirk Schlüter, Maria J G T Vehreschild, Thomas Fischer
No abstract text is available yet for this article.
May 18, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28514306/unusual-case-of-rapid-growing-intraabdominal-abscess-caused-by-stenotrophomonas-maltophilia-after-laparoscopic-appendectomy-due-to-perforated-appendicitis-a-case-report
#16
Dae Ro Lim, Jung Cheol Kuk, Taehyung Kim, Eung Jin Shin
INTRODUCTION: An intraabdominal abscess due to Stenotrophomonas maltophilia (S maltophilia) infection is a very rare clinical manifestation. S maltophilia is a glucose nonfermentative, aerobic, gram-negative, mobile, and biofilm-forming bacterium. It is an opportunistic pathogen and uncommon cause of infection. Respiratory tract infections (pneumonia) and bloodstream infections (bacteremia) are the most common clinical manifestations of S maltophilia infection. CONCLUSIONS: This case report describes an unusual case of a rapidly growing, extremely large intraabdominal abscess (within 1 week during antibiotic therapy), which was detected 2 weeks after a laparoscopic appendectomy was performed for perforated appendicitis and was caused by multidrug-resistant S maltophilia infection...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28512683/messenger-rna-transport-in-the-opportunistic-fungal-pathogen-candida-albicans
#17
REVIEW
Anne E McBride
Candida albicans, a common commensal fungus, can cause disease in immunocompromised hosts ranging from mild mucosal infections to severe bloodstream infections with high mortality rates. The ability of C. albicans cells to switch between a budding yeast form and an elongated hyphal form is linked to pathogenicity in animal models. Hyphal-specific proteins such as cell-surface adhesins and secreted hydrolases facilitate tissue invasion and host cell damage, but the specific mechanisms leading to asymmetric protein localization in hyphae remain poorly understood...
May 16, 2017: Current Genetics
https://www.readbyqxmd.com/read/28512628/dysplasia-of-granulocytes-in-a-patient-with-hpv-disease-recurrent-infections-and-b-lymphopenia-a-novel-variant-of-whim-syndrome
#18
Giusella M F Moscato, Erica Giacobbi, Lucia Anemona, Silvia Di Cesare, Gigliola Di Matteo, Massimo Andreoni, Alessandro Mauriello, Viviana Moschese
WHIM syndrome is a condition in which affected persons have chronic peripheral neutropenia, lymphopenia, abnormal susceptibility to human papilloma virus infection, and myelokathexis. Myelokathexis refers to the retention of mature neutrophils in the bone marrow (BM), which accounts for degenerative changes and hypersegmentation. Most patients present heterozygous autosomal dominant mutations of the gene encoding CXCR4. Consequently, aberrant CXCL12/CXCR4 signaling impairs the receptor downregulation causing hyperactivation (gain-of-function) that affects BM homing for myelopoiesis and lymphopoiesis and the release of neutrophils in the bloodstream...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28509133/denosumab-for-treatment-of-immobilization-related-hypercalcemia-in-a-patient-with-end-stage-renal-disease
#19
Atsuko Uehara, Masahiko Yazawa, Atsumi Kawata, Rina Hachisuka, Yugo Shibagaki
The efficacy and safety of denosumab for the treatment of immobilization-related hypercalcemia in end-stage renal disease remain uncertain. We describe the case of a hemodialysis patient with immobilization-related hypercalcemia who was successfully treated with denosumab. A 79-year-old man admitted for hemodialysis after sustaining an acute kidney injury developed immobilization-related hypercalcemia due to the impairment resulting from an acute myocardial infarction, acute heart failure, and catheter-related bloodstream infection...
May 2017: CEN Case Reports
https://www.readbyqxmd.com/read/28507105/reduced-vancomycin-susceptibility-of-methicillin-susceptible-staphylococcus-aureus-no-significant-impact-on-mortality-but-increase-in-complicated-infection
#20
Sean B Sullivan, Eloise D Austin, Stephania Stump, Barun Mathema, Susan Whittier, Franklin D Lowy, Anne-Catrin Uhlemann
Methicillin-susceptible Staphylococcus aureus (MSSA) bloodstream infections (BSIs) often lead to severe complications despite the availability of effective antibiotics. It remains unclear whether elevated vancomycin MICs are associated with worse outcomes.We conducted a 2-year retrospective cohort study (n=252) of patients with MSSA BSIs at a tertiary care hospital. We defined reduced vancomycin susceptibility (RVS) as a Microscan MIC of 2 mg/L. All strains were genotyped (spa) and assessed for agr functionality...
May 15, 2017: Antimicrobial Agents and Chemotherapy
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