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https://www.readbyqxmd.com/read/28927234/metabolic-profiling-of-central-nervous-system-disease-in-trypanosoma-brucei-rhodesiense-infection
#1
Sabrina D Lamour, Vincent P Alibu, Elaine Holmes, Jeremy M Sternberg
Background: The progression of Human African Trypanosomiasis from the early hemolymphatic stage to the late meningoencephalitic stage is of critical diagnostic importance as it determines the choice of potentially toxic drug regimens. Current diagnostic criteria involving analysis of cerebrospinal fluid (CSF) for parasites and/or pleiocytosis are sensitive, but recent evidence suggests that specificity may be poor. Methods: We used an untargeted global metabolic profiling approach for the discovery of novel candidate stage diagnostic markers in CSF from Trypanosoma brucei rhodesiense patients using 1H nuclear magnetic resonance (NMR) spectroscopy...
September 12, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28927201/recognition-and-clinical-presentation-of-invasive-fungal-disease-in-neonates-and-children
#2
Jill King, Zoi-Dorothea Pana, Thomas Lehrnbecher, William J Steinbach, Adilia Warris
Invasive fungal diseases (IFDs) are devastating opportunistic infections that result in significant morbidity and death in a broad range of pediatric patients, particularly those with a compromised immune system. Recognizing them can be difficult, because nonspecific clinical signs and symptoms or isolated fever are frequently the only presenting features. Therefore, a high index of clinical suspicion is necessary in patients at increased risk of IFD, which requires knowledge of the pediatric patient population at risk, additional predisposing factors within this population, and the clinical signs and symptoms of IFD...
September 1, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28926962/anti-nkg2d-mab-a-new-treatment-for-crohn-s-disease
#3
REVIEW
Kasper Vadstrup, Flemming Bendtsen
Crohn's disease (CD) and ulcerative colitis (UC) are immunologically-mediated, debilitating conditions resulting from destructive inflammation of the gastrointestinal tract. The pathogenesis of IBD is incompletely understood, but is considered to be the result of an abnormal immune response with a wide range of cell types and proteins involved. Natural Killer Group 2D (NKG2D) is an activating receptor constitutively expressed on human Natural Killer (NK), γδ T, mucosal-associated invariant T (MAIT), CD56⁺ T, and CD8⁺ T cells...
September 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28926560/hiv-and-hcv-in-u-s-prisons-and-jails-the-correctional-facility-as-a-bellwether-over-time-for-the-community-s-infections
#4
Anne C Spaulding, Emeli J Anderson, Mohammed A Khan, Cesar A Taborda-Vidarte, Jennifer A Phillips
Screening and treating correctional populations for HIV and HCV infections is essential to successfully addressing both epidemics in the USA. The prevalence of HIV and HCV infection is high in prisons and jails due to increased rates of incarceration among disproportionately affected groups such as injection drug users. Through a search of the published and grey literature and surveying persons overseeing health programs in prisons, we collected data on efforts to determine prevalence first for HIV and then for HCV...
September 19, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28926410/outcomes-for-hiv-associated-diffuse-large-b-cell-lymphoma-in-the-modern-cart-era
#5
Caroline Besson, Remi Lancar, Sophie Prevot, Michele Algarte-Genin, Pierre Delobel, Fabrice Bonnet, Marie-Caroline Meyohas, Marialuisa Partisani, Lucie Oberic, Jean Gabarre, Cécile Goujard, François Boue, Paul Coppo, Regis Costello, Houria Hendel-Chavez, Nawel Mekerri, Gabriella Dos Santos, Christian Recher, Richard Delarue, Rene-Olivier Casasnovas, Yassine Taoufik, Nicolas Mounier, Dominique Costagliola
OBJECTIVE: Non-Hodgkin's lymphoma (NHL) remains among the most frequent malignancies in persons living with HIV (PLWHIV). Survival among patients with HIV-associated diffuse large B-cell lymphoma (DLBCL), the most frequent NHL subtype, has improved markedly in recent years. We aimed to analyze characteristics and outcomes of DLBCL in HIV-infected patients in the era of modern combined antiretroviral therapy (cART). DESIGN: PLWHIV with lymphoma were prospectively enrolled in the French ANRS-CO16 Lymphovir cohort between 2008 and 2015...
September 18, 2017: AIDS
https://www.readbyqxmd.com/read/28926192/testing-of-a-bioactive-moldable-bone-graft-substitute-in-an-infected-critically-sized-segmental-defect-model
#6
Matt E Brown, Yuan Zou, Rebecca Peyyala, Sarandeep S Huja, Larry L Cunningham, Todd A Milbrandt, Thomas D Dziubla, David A Puleo
Large infected bone defects, often resulting from high energy traumas, are difficult to treat due to their variability in complexity and location. Standard treatment for infected bone defects begins with a protocol that includes a series of debridements in conjunction with an extended course of systemic antibiotics. Only after the infection has been eliminated will repair of the defect commence, typically with implantation of autologous bone. To address some of the shortcomings of the standard treatment methods, such as serial procedures, limited grafting material, and the need for a second surgical site for autologous bone, a sequential, dual drug-releasing, moldable, calcium sulfate-based bone graft substitute was developed previously...
September 19, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28925980/changes-in-fatty-acid-composition-of-human-milk-in-response-to-cold-like-symptoms-in-the-lactating-mother-and-infant
#7
Andrew S Gardner, Ibrahim A Rahman, Ching T Lai, Anna Hepworth, Naomi Trengove, Peter E Hartmann, Donna T Geddes
Infants rely on their innate immune systems to protect them from infection. Human milk (HM) contains fatty acids (FAs) and monoacylglycerols that are known to exhibit antiviral and antibacterial properties in vitro. The specific fat content of HM may potentially affect the efficacy of this antimicrobial activity. This preliminary study investigates whether the proportions of FA in HM change in response to infections, leading to cold-like symptoms in the mother or infant. Milk samples were obtained from mothers (n = 26) when they and their infants were healthy, and when mother, infant, or both suffered cold-like symptoms...
September 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28925959/preventing-surgical-site-infections-using-a-natural-biodegradable-antibacterial-coating-on-surgical-sutures
#8
Jochen Reinbold, Ann-Kristin Uhde, Ingrid Müller, Tobias Weindl, Jürgen Geis-Gerstorfer, Christian Schlensak, Hans-Peter Wendel, Stefanie Krajewski
Surgical site infections (SSIs) are one of the most common nosocomial infections, which can result in serious complications after surgical interventions. Foreign materials such as implants or surgical sutures are optimal surfaces for the adherence of bacteria and subsequent colonization and biofilm formation. Due to a significant increase in antibiotic-resistant bacterial strains, naturally occurring agents exhibiting antibacterial properties have great potential in prophylactic therapies. The aim of this study was to develop a coating for surgical sutures consisting of the antibacterial substance totarol, a naturally occurring diterpenoid isolated from Podocarpustotara in combination with poly(lactide-co-glycolide acid) (PLGA) as a biodegradable drug delivery system...
September 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28925928/subtenon-amikacin-injection-for-the-treatment-of-nocardia-asteroides-orbital-cellulitis-in-a-patient-with-a-history-of-scleral-buckling
#9
Zeynep Gursel Ozkurt, Hakan Demirci
PURPOSE: To evaluate the use of subtenon amikacin injection for the treatment of Nocardia asteroides orbital cellulitis in a patient with a history of scleral buckle surgery. METHODS: Case report. RESULTS: A 79-year-old diabetic woman presented with an 8-month history of diplopia, discharge, and swelling around her left eye. She had a scleral buckle surgery in this eye about 15 years ago. Examination of the left eye showed a visual acuity of 20/80, swollen and ptotic upper eyelid, chemotic conjunctiva, and limited extraocular motility...
October 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28925927/postoperative-endophthalmitis-caused-by-bosea-thiooxidans
#10
Vaidehi S Dedania, Devon H Ghodasra, David N Zacks
PURPOSE: To report an unusual case of postcataract endophthalmitis secondary to Bosea thiooxidans. METHODS: Case report. RESULTS: An 86-year-old man presented with postoperative endophthalmitis 3 weeks after uncomplicated cataract surgery. He complained of a headache and blurry vision but denied having eye pain. Slit-lamp examination demonstrated leukocytes with a fibrinous membrane in the anterior segment and vitritis. A diagnosis of acute postoperative endophthalmitis was made, and the patient was treated with intravitreal antibiotics...
October 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28925868/design-and-discovery-of-new-antibacterial-agents-advances-perspectives-challenges
#11
Josef Jampilek
Emerging resistance of bacterial pathogens to clinically used drugs, including not only first-choice but also second- and third-choice drugs, is alarming, but since the 1990s only a modest number of new, first in class, drugs for systemic administration have been marketed for the treatment of bacterial infections. This article provides a review of recently reported new antibacterial chemotherapeutics approved for clinical practice, antibacterial chemotherapeutics in clinical trials and antibacterial agents under development...
September 18, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28924724/development-of-a-high-throughput-magnetic-separation-device-for-malaria-infected-erythrocytes
#12
A Blue Martin, Wei-Tao Wu, Marina V Kameneva, James F Antaki
This study describes a non-dilutive high-gradient magnetic separation (HGMS) device intended to continuously remove malaria-infected red blood cells (iRBCs) from the circulation. A mesoscale prototype device with disposable photo-etched ferromagnetic grid and reusable permanent magnet was designed with a computationally-optimized magnetic force. The prototype device was evaluated in vitro using a non-pathogenic analog for malaria-infected blood, comprised of 24% healthy RBCs, 6% human methemoglobin RBCs (metRBCs), and 70% phosphate buffer solution (PBS)...
September 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28924472/the-effect-of-antibiotic-use-on-prevalence-of-nosocomial-vancomycin-resistant-enterococci-an-ecologic-study
#13
Cornelius Remschmidt, Michael Behnke, Axel Kola, Luis A Peña Diaz, Anna M Rohde, Petra Gastmeier, Frank Schwab
BACKGROUND: Vancomycin-resistant enterococci (VRE) are among the most common antimicrobial-resistant pathogens causing nosocomial infections. Although antibiotic use has been identified as a risk factor for VRE, it remains unclear which antimicrobial agents particularly facilitate VRE selection. Here, we assessed whether use of specific antimicrobial agents is independently associated with healthcare-associated (HA) VRE rates in a university hospital setting in Berlin, Germany. METHODS: We conducted the study between January 2014 and December 2015 at the Charité-university hospital of Berlin, Germany...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28924154/a-dna-aptamer-efficiently-inhibits-the-infectivity-of-bovine-herpesvirus-1-by-blocking-viral-entry
#14
Jian Xu, Xixi Zhang, Shuanghai Zhou, Junjun Shen, Dawei Yang, Jing Wu, Xiaoyang Li, Meiling Li, Xiufen Huang, Joshua E Sealy, Munir Iqbal, Yongqing Li
Bovine herpesvirus 1 (BoHV-1) is an important pathogen of domestic and wild cattle responsible for major economic losses in dairy and beef industries throughout the world. Inhibition of viral entry plays a crucial role in the control of BoHV-1 infection and aptamers have been reported to inhibit viral replication. In this study, nine DNA aptamers that target BoHV-1 were generated using systemic evolution of ligands by exponential enrichment. Of the nine candidates, aptamer IBRV-A4 exhibited the highest affinity and specificity for BoHV-1, which bound to BoHV-1 with a Kd value of 3...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28924140/linoleic-and-palmitoleic-acid-block-streptokinase-mediated-plasminogen-activation-and-reduce-severity-of-invasive-group-a-streptococcal-infection
#15
Katharina Rox, Rolf Jansen, Torsten G Loof, Christine M Gillen, Steffen Bernecker, Mark J Walker, Gursharan Singh Chhatwal, Rolf Müller
In contrast to mild infections of Group A Streptococcus (GAS) invasive infections of GAS still pose a serious health hazard: GAS disseminates from sterile sites into the blood stream or deep tissues and causes sepsis or necrotizing fasciitis. In this case antibiotics do not provide an effective cure as the bacteria are capable to hide from them very quickly. Therefore, new remedies are urgently needed. Starting from a myxobacterial natural products screening campaign, we identified two fatty acids isolated from myxobacteria, linoleic and palmitoleic acid, specifically blocking streptokinase-mediated activation of plasminogen and thereby preventing streptococci from hijacking the host's plasminogen/plasmin system...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28924106/intravenous-immunoglobulin-monotherapy-for-granulomatous-lymphocytic-interstitial-lung-disease-in-common-variable-immunodeficiency
#16
Mizue Hasegawa, Fumikazu Sakai, Asako Okabayashi, Akitoshi Sato, Naoko Yokohori, Hideki Katsura, Chihiro Asano, Toshiko Kamata, Eitetsu Koh, Yasuo Sekine, Kenzo Hiroshima, Takashi Ogura, Tamiko Takemura
Common variable immunodeficiency (CVID) is a heterogeneous subset of immunodeficiency disorders. Recurrent bacterial infection is the main feature of CVID, but various non-infectious complications can occur. A 42-year-old woman presented with cough and abnormal chest X-ray shadows. Laboratory tests showed remarkable hypogammaglobulinemia. Computed tomography revealed multiple consolidation and nodules on the bilateral lung fields, systemic lymphadenopathy, and splenomegaly. A surgical lung biopsy specimen provided the final diagnosis of lymphoproliferative disease in CVID, which was grouped under the term granulomatous lymphocytic interstitial lung disease...
September 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28924054/immunosurveillance-and-immunoediting-of-breast-cancer-via-class-i-mhc-receptors
#17
Megan M Tu, Mir Munir A Rahim, Celine Sayed, Ahmad Bakur Mahmoud, Andrew P Makrigiannis
Ly49 receptors, which recognize 'self' class I major histocompatibility complex (MHC-I) molecules, enable natural killer (NK) cells to detect loss of MHC-I expression on transformed and virally-infected cells. The impact of NK cell-mediated MHC-I surveillance on immunoediting of breast cancer is still not fully understood. This work assesses the impact of Ly49 receptors on tumor development in terms of cancer control and in driving immune-evading cancer mutations. Genetically modified Ly49-deficient mice and those lacking NK cells through antibody depletion were less able to control E0771-derived mammary tumors in an MHC-I-dependent fashion...
September 18, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/28924032/staphylococcus-aureus-strain-newman-d2c-contains-mutations-in-major-regulatory-pathways-that-cripple-its-pathogenesis
#18
William E Sause, Richard Copin, Aidan O'malley, Rita Chan, Brian J Morrow, Peter T Buckley, Jeffrey Fernandez, A Simon Lynch, Bo Shopsin, Victor J Torres
Staphylococcus aureus is a major human pathogen that imposes a great burden on the healthcare system. In the development of anti-staphylococcal modalities intended to reduce the burden of staphylococcal disease, it is imperative to select appropriate models of S. aureus strains when assessing the efficacy of novel agents. Here, using whole genome sequencing, we reveal that the commonly used strain Newman D2C from the American Type Culture Collection (ATCC) contains mutations that render the strain essentially avirulent...
September 18, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28924031/cytoplasmic-copper-detoxification-in-salmonella-can-contribute-to-sodc-metalation-but-is-dispensable-during-systemic-infection
#19
Luke A Fenlon, James M Slauch
Salmonella Typhimurium is a leading cause of foodborne disease worldwide. Severe infections result from the ability of S. Typhimurium to survive within host immune cells, despite being exposed to various host antimicrobial factors. SodCI, a copper-zinc cofactored superoxide dismutase, is required to defend against phagocytic superoxide. SodCII, an additional periplasmic superoxide dismutase, although produced during infection, does not function in the host. Previous studies suggested that CueP, a periplasmic copper binding protein, facilitates acquisition of copper by SodCII...
September 18, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28924030/altered-regulation-of-the-diguanylate-cyclase-yaic-reduces-production-of-type-1-fimbriae-in-a-pst-mutant-of-uropathogenic-e-coli-cft073
#20
Sébastien Crépin, Gaëlle Porcheron, Sébastien Houle, Josée Harel, Charles M Dozois
The pst gene cluster encodes the phosphate specific transport system (Pst). Inactivation of the Pst system constitutively activates the two-component regulatory system PhoBR and attenuates virulence of pathogenic bacteria. In uropathogenic E. coli strain CFT073, attenuation by inactivation of pst is predominantly attributed to the decreased expression of type 1 fimbriae. However, the molecular mechanisms connecting the Pst system and type 1 fimbriae are unknown. To address this, a transposon library was constructed in the pst mutant, and clones were tested for a regain in type 1 fimbriae production...
September 18, 2017: Journal of Bacteriology
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