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https://www.readbyqxmd.com/read/28323886/contribution-of-urinary-tract-infection-to-the-burden-of-febrile-illnesses-in-young-children-in-rural-kenya
#1
Wechuli Geoffrey Masika, Wendy Prudhomme O'Meara, Thomas L Holland, Janice Armstrong
INTRODUCTION: The clinical features of UTI in young children may not localize to the urinary tract and closely resemble other febrile illnesses. In malaria endemic areas, a child presenting with fever is often treated presumptively for malaria without investigation for UTI. Delayed or inadequate treatment of UTI increases the risk of bacteremia and renal scarring in young children and subsequently complications as hypertension and end stage renal disease in adulthood. METHODS: A cross-sectional study was carried out in a hospital in western Kenya...
2017: PloS One
https://www.readbyqxmd.com/read/28323446/leguminosae-native-nodulating-bacteria-from-a-gold-mine-as-contaminated-soil-multi-resistance-to-trace-elements-and-possible-role-in-plant-growth-and-mineral-nutrition
#2
Wesley de M Rangel, Silvia M de Oliveira Longatti, Paulo A A Ferreira, Daiane S Bonaldi, Amanda A Guimarães, Sofie Thijs, Nele Weyens, Jaco Vangronsveld, Fatima M S Moreira
Efficient N2-fixing Leguminosae nodulating bacteria resistant to As may facilitate plant growth on As-contaminated sites. In order to identify bacteria possessing these features, 24 strains were isolated from nodules of the trap species Crotalaria spectabilis (12) and Stizolobium aterrimum (12) growing on an As-contaminated gold mine site. 16S rRNA gene sequencing revealed that most of the strains belonged to the group of α-Proteobacteria, being representatives of the genera Bradyrhizobium, Rhizobium, Inquilinus, Labrys, Bosea, Starkeya and Methylobacterium...
March 21, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28320713/antimicrobial-percutaneous-nephrostomy-catheters-for-the-prevention-of-renal-infections-in-vitro-studies
#3
Nylev Vargas-Cruz, Ruth A Reitzel, Joel Rosenblatt, Mohamed Jamal, Ariel D Szvalb, Anne-Marie Chaftari, Ray Hachem, Issam Raad
Purpose - Percutaneous nephrostomy (PCN) catheters are the primary method for draining ureters obstructed by malignancy and preventing a decline of the renal function. However, PCN-related infections such as pyelonephritis and urosepsis remain a significant concern. Currently no antimicrobial PCNs are available for preventing infectious complications. Vascular catheters impregnated with Minocycline/Rifampin (M/R) and M/R with Chlorhexidine coating (M/R+CHD) have previously demonstrated antimicrobial activity...
March 20, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28319476/anesthesia-in-patients-with-infectious-disease-caused-by-multi-drug-resistant-bacteria
#4
Sharon Einav, Yonit Wiener-Well
PURPOSE OF REVIEW: Up to 50% of specific bacterial strains in healthcare admission facilities are multidrug-resistant organisms (MDROs). Involvement of anesthesiologists in management of patients carrying/at risk of carrying MDROs may decrease transmission in the Operating Room (OR). RECENT FINDINGS: Anesthesiologists, their work area and tools have all been implicated in MDRO outbreaks. Causes include contamination of external ventilation circuits and noncontribution of filters to prevention, inappropriate decontamination procedures for nondisposable equipment (e...
March 17, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28318778/stenotrophomonas-maltophilia-healthcare-associated-infections-identification-of-two-main-pathogenic-genetic-backgrounds
#5
C Corlouer, B Lamy, M Desroches, J Ramos-Vivas, E Mehiri-Zghal, O Lemenand, J-M Delarbre, J-W Decousser
BACKGROUND: Stenotrophomonas maltophilia is an opportunistic multi-drug-resistant bacterium responsible for healthcare-associated infections. Strategies for in-hospital infection control and management of carriers and environmental reservoirs remain controversial. AIM: To determine the population structure of S. maltophilia strains in hospitalized infected patients and to identify putative highly pathogenic subpopulations that require upgraded infection control measures...
February 9, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28306235/gcib-tof-sims-high-resolution-imaging-of-cardiolipin-speciation-in-the-brain-identification-of-molecular-losses-after-traumatic-injury
#6
Hua Tian, Louis J Sparvero, Andrew A Amoscato, Anna Bloom, Hulya Bayir, Valerian E Kagan, Nicholas Winograd
Gas cluster ion beam secondary ion mass spectrometry (GCIB-SIMS) has shown the full potential of mapping intact lipids in biological systems with better than 10 µm lateral resolution. This study investigated further the capability of GCIB-SIMS in imaging high-mass signals from intact cardiolipin (CL) and gangliosides in normal brain and the effect of a controlled cortical impact model (CCI) of traumatic brain injury (TBI) on their distribution. A combination of enzymatic and chemical treatments was employed to suppress the signals from the most abundant phospholipids (phosphatidylcholine (PC) and phosphatidylethanolamine (PE)) and enhance the signals from the low abundance CLs and gangliosides to allow their GCIB-SIMS detection at 8 and 16 µm spatial resolution...
March 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28296935/peptide-modification-results-in-the-formation-of-a-dimer-with-a-60-fold-enhanced-antimicrobial-activity
#7
Amal Thamri, Myriam Létourneau, Alex Djoboulian, David Chatenet, Eric Déziel, Annie Castonguay, Jonathan Perreault
Cationic antimicrobial peptides (CAMPs) occur naturally in numerous organisms and are considered as a class of antibiotics with promising potential against multi-resistant bacteria. Herein, we report a strategy that can lead to the discovery of novel small CAMPs with greatly enhanced antimicrobial activity and retained antibiofilm potential. We geared our efforts towards i) the N-terminal cysteine functionalization of a previously reported small synthetic cationic peptide (peptide 1037, KRFRIRVRV-NH2), ii) its dimerization through a disulfide bond, and iii) a preliminary antimicrobial activity assessment of the newly prepared dimer against Pseudomonas aeruginosa and Burkholderia cenocepacia, pathogens responsible for the formation of biofilms in lungs of individuals with cystic fibrosis...
2017: PloS One
https://www.readbyqxmd.com/read/28295630/screening-for-asymptomatic-bacteruria-at-one-month-after-adult-kidney-transplantation-clinical-factors-and-implications
#8
Y S B Goh, Z L Deng, P S C Cheong, R Lata, T H A Goh, A Vathsala, H Y Tiong
OBJECTIVE: Urinary tract infections(UTI) account for significant morbidity after kidney transplantation(KT). Screening for asymptomatic bacteruria(AB) has proven to be beneficial in certain population including pregnant women; however it is not well-studied in KT population. We reviewed the incidence, clinical features and implications of asymptomatic bacteruria one-month after KT. METHODS: 171 adult KT patients(86(50.3%) living transplants, 87(50.9%) males, mean age 47...
March 10, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28295441/fosfomycin-for-the-treatment-of-cystitis-in-the-abdominal-solid-organ-transplant-population
#9
A A Loethen, L Kerstenetzky, J L Descourouez, G E Leverson, J A Smith, M R Jorgenson
STUDY OBJECTIVES: Evaluate the use of fosfomycin (FOS) at the FDA-approved single-dose regimen as well as off-label multidose regimens for the treatment of cystitis after abdominal solid organ transplant (aSOT). DESIGN: Retrospective study. SETTING: Tertiary academic medical center. PATIENTS: Adult inpatients with history of aSOT receiving FOS between 1/1/2009-4/30/2015 for the treatment of cystitis. MEASUREMENTS AND MAIN RESULTS: Seventy-six courses of FOS were identified in 64 patients...
March 12, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28291632/necessity-of-carbapenem-use-when-prescribed-per-infectious-diseases-specialists
#10
Kellie J Goodlet, Michael D Nailor
Preauthorization strategies, including restricting broad-spectrum antimicrobials such as carbapenems to infectious diseases physicians (ID) are commonly employed by stewardship programs. The appropriateness, or "necessity" of empiric carbapenem therapy by ID, defined as an isolated organism sensitive to the carbapenem and resistant to cefepime, was evaluated over a 6month span and included 84 patients. Additionally, 30 patients followed by ID who were not prescribed a carbapenem until final susceptibilities were included as a definitive therapy group...
February 27, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28289036/characterizing-the-antimicrobial-activity-of-n-2-n-4-disubstituted-quinazoline-2-4-diamines-towards-multidrug-resistant-acinetobacter-baumannii
#11
Renee Fleeman, Kurt S Van Horn, Megan M Barber, Whittney N Burda, David L Flanigan, Roman Manetsch, Lindsey N Shaw
We previously reported a series of N(2) ,N(4) -disubstituted quinazoline-2,4-diamine as dihydrofolate reductase inhibitors, with potent in vitro and in vivo antibacterial activity against MRSA strains. In this work we extend our previous study to the Gram-negative pathogen Acinetobacter baumannii We determined that optimized N(2) ,N(4) -disubstituted quinazoline-2,4-diamines are strongly antibacterial against multi-drug resistant A. baumannii strains when the 6-position is substituted with a halide or an alkyl substituent...
March 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28284195/zinc-stress-induces-copper-depletion-in-acinetobacter-baumannii
#12
Karl A Hassan, Victoria G Pederick, Liam D H Elbourne, Ian T Paulsen, James C Paton, Christopher A McDevitt, Bart A Eijkelkamp
BACKGROUND: The first row transition metal ions zinc and copper are essential to the survival of many organisms, although in excess these ions are associated with significant toxicity. Here, we examined the impact of zinc and copper stress on Acinetobacter baumannii, a common opportunistic pathogen. RESULTS: We show that extracellular zinc stress induces a copper-specific depletion phenotype in A. baumannii ATCC 17978. Supplementation with copper not only fails to rescue this phenotype, but further exacerbates the copper depletion...
March 11, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28282619/the-use-of-mrp1-deficient-danio-rerio-zebrafish-embryos-to-investigate-the-role-of-mrp1-in-the-toxicity-of-cadmium-chloride-and-benzo-a-pyrene
#13
Jingjing Tian, Jia Hu, Mingli Chen, Huancai Yin, Peng Miao, Pengli Bai, Jian Yin
Previous studies in our lab have revealed that both P-glycoprotein (Pgp) and multi-resistance associated protein (Mrp) 1 played important roles in the detoxification of heavy metals and polycyclic aromatic hydrocarbon (PAH) in zebrafish embryos. This paper aims to extend this research by using mrp1-deficient model to illustrate the individual function of Mrp1. In this respect, CRISPR/Cas9 system was employed to generate a frameshift mutation in zebrafish mrp1 causing premature translational stops in Mrp1. Significant reduction on the efflux function of Mrps was found in mutant zebrafish embryos, which correlated well with the significantly enhanced accumulation and toxicity of cadmium chloride (CdCl2) and benzo[a]pyrene (BαP), indicating the protective role of the corresponding protein...
March 2, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28273965/emergence-of-carbapenem-resistant-non-fermenting-gram-negative-bacilli-isolated-in-an-icu-of-a-tertiary-care-hospital
#14
Sonika Agarwal, Barnali Kakati, Sushant Khanduri, Shalini Gupta
INTRODUCTION: The emergence and spread of Multi-Drug Resistant (MDR) Non-Fermenting Gram-Negative Bacilli (NFGNB) in Intensive Care Units (ICU) and their genetic potential to transmit diverse antibiotic resistance regardless of their ability to ferment glucose poses a major threat in hospitals. The complex interplay of clonal spread, persistence, transmission of resistance elements and cell-cell interaction leads to the difficulty in controlling infections caused by these multi drug-resistant strains...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28272881/role-of-aromatic-and-negatively-charged-residues-of-drrb-in-multi-substrate-specificity-conferred-by-the-drrab-system-of-streptomyces-peucetius
#15
Kenneth Brown, Wen Li, Parjit Kaur
Resistance to the anticancer antibiotics, doxorubicin and daunorubicin, in the producer organism Streptomyces peucetius is conferred by an ABC transporter made of two proteins DrrA and DrrB, which together form a dedicated exporter for these two antibiotics. Surprisingly, however, the DrrAB system exhibits broad substrate specificity overlapping with well-studied multidrug resistance transporters, including P-glycoprotein. Therefore it provides an excellent model to study molecular basis of multi-specificity in a prototype efflux system with the potential to unravel the origin and evolution of multidrug resistance...
March 8, 2017: Biochemistry
https://www.readbyqxmd.com/read/28272165/reduced-insulin-resistance-contributes-to-the-beneficial-effect-of-protein-tyrosine-phosphatase-1b-deletion-in-a-mouse-model-of-sepsis
#16
Eugénie Delile, Rémi Nevière, Pierre-Alain Thiébaut, Julie Maupoint, Paul Mulder, David Coquerel, Sylvanie Renet, Jennifer Rieusset, Vincent Richard, Fabienne Tamion
Hyperglycemia is a common feature of septic patients and has been associated with poor outcome and high mortality. In contrast, insulin has been shown to decrease mortality and to prevent the incidence of multi-organ failure but is often associated with deleterious hypoglycemia. Protein Tyrosine Phosphatase 1B (PTP1B) is a negative regulator of both insulin signaling and NO production, and has been shown to be an aggravating factor in septic shock. To evaluate the potential therapeutic effect of PTP1B blockade on glucose metabolism and insulin resistance in an experimental model of sepsis, we assessed the effect of PTP1B gene deletion in a cecal ligation and puncture (CLP) model of sepsis...
March 7, 2017: Shock
https://www.readbyqxmd.com/read/28271058/peptides-with-dual-antimicrobial-and-anticancer-activities
#17
REVIEW
Mário R Felício, Osmar N Silva, Sônia Gonçalves, Nuno C Santos, Octávio L Franco
In recent years, the number of people suffering from cancer and multi-resistant infections has increased, such that both diseases are already seen as current and future major causes of death. Moreover, chronic infections are one of the main causes of cancer, due to the instability in the immune system that allows cancer cells to proliferate. Likewise, the physical debility associated with cancer or with anticancer therapy itself often paves the way for opportunistic infections. It is urgent to develop new therapeutic methods, with higher efficiency and lower side effects...
2017: Frontiers in Chemistry
https://www.readbyqxmd.com/read/28270268/antibiotic-stewardship-new-frontier-familiar-journey
#18
Caren McHenry Martin
Recent changes in regulations by the Centers for Medicare & Medicaid Services require long-term care facilities to meet specific requirements on antibiotic stewardship, promoting the appropriate use of antibiotics and antimicrobials. The goal is to improve patient outcomes and decrease the spread of infections caused by multi-drug-resistant organisms. Consultant pharmacists can help facility personnel implement policies and procedures for effective antibiotic stewardship, assist prescribers and facility staff in understanding how to use the facility's antibiogram, find appropriate resources, and provide facility personnel with feedback on their antimicrobial stewardship efforts...
March 1, 2017: Consultant Pharmacist: the Journal of the American Society of Consultant Pharmacists
https://www.readbyqxmd.com/read/28266143/the-influence-of-donor-factors-on-corneal-organ-culture-contamination
#19
Anja K Gruenert, Katja Rosenbaum, Gerd Geerling, Thomas A Fuchsluger
PURPOSE: To evaluate the contamination rate and the corresponding spectrum of microbes and to identify donor risk factors for corneal organ culture contaminations. METHODS: A total of 3306 organ-cultured donor corneas were included in the study. We performed a retrospective database analysis to evaluate donor factors such as gender, age, death-to-explantation interval (DEI), procurement site and cause of death and to determine their influence on donor cornea contaminations...
March 7, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28264991/giga-and-gigb-are-master-regulators-of-antibiotic-resistance-stress-responses-and-virulence-in-acinetobacter-baumannii
#20
Michael J Gebhardt, Howard A Shuman
A critical component of bacterial pathogenesis is the ability of an invading organism to sense and adapt to the harsh environment imposed by the host's immune system. This is especially important for opportunistic pathogens, such as Acinetobacter baumannii, a nutritionally versatile, environmental organism that has recently gained attention as a life-threatening human pathogen. The emergence of A. baumannii is closely linked to antibiotic resistance and many contemporary isolates are multi-drug resistant (MDR)...
March 6, 2017: Journal of Bacteriology
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