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https://www.readbyqxmd.com/read/29114397/false-positive-galactomannan-assay-in-broncho-alveolar-lavage-after-enteral-nutrition-solution-inhalation-a-case-report
#1
Olivier Lheureux, Isabel Montesinos, Olivier Taton, Martine Antoine, Jean-Charles Preiser, Joelle Nortier, Jacques Creteur, Frederique Jacobs, David Grimaldi
Introduction. Diagnosis of invasive aspergillosis is challenging and the gold standard for definite diagnosis remains histopathological tissue examination. However, invasive procedures such as lung biopsy are often not feasible in critically ill patients. The detection of fungal cell wall components like Aspergillus galactomannan in broncho-alveolar lavage remains a key component of the diagnostic procedure. False-positive of the Aspergillus galactomannan assay is not frequent. Case presentation. We report a case of positive galactomannan in broncho-alveolar lavage fluid after enteral nutrition aspiration without signs of invasive aspergillosis...
September 2017: JMM Case Reports
https://www.readbyqxmd.com/read/29091093/host-immune-evasion-strategies-of-malaria-blood-stage-parasite
#2
REVIEW
Xue Yan Yam, Peter R Preiser
Host immune evasion is a key strategy for the continual survival of many microbial pathogens including Apicomplexan protozoan: Plasmodium spp., the causative agent of Malaria. The malaria parasite has evolved a variety of mechanisms to evade the host immune responses within its two hosts: the female Anopheles mosquito vector and vertebrate host. In this review, we will focus on the molecular mechanisms of the immune evasion strategies used by the Plasmodium parasite at the blood stage which is responsible for the clinical manifestations of human malaria...
November 21, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/29070841/an-apiap2-member-regulates-expression-of-clonally-variant-genes-of-the-human-malaria-parasite-plasmodium-falciparum
#3
Rafael M Martins, Cameron R Macpherson, Aurélie Claes, Christine Scheidig-Benatar, Hiroshi Sakamoto, Xue Yan Yam, Peter Preiser, Suchi Goel, Mats Wahlgren, Odile Sismeiro, Jean-Yves Coppée, Artur Scherf
Variegated surface antigen expression is key to chronic infection and pathogenesis of the human malaria parasite Plasmodium falciparum. This protozoan parasite expresses distinct surface molecules that are encoded by clonally variant gene families such as var, rif and stevor. The molecular mechanisms governing activation of individual members remain ill-defined. To investigate the molecular events of the initial transcriptional activation process we focused on a member of the apicomplexan ApiAP2 transcription factor family predicted to bind to the 5' upstream regions of the var gene family, AP2-exp (PF3D7_1466400)...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28992307/attempted-molecular-detection-of-the-thermally-dimorphic-human-fungal-pathogen-emergomyces-africanus-in-terrestrial-small-mammals-in-south-africa
#4
Nadine Cronjé, Ilan S Schwartz, Liezl Retief, Armanda D S Bastos, Sonja Matthee, Wolfgang Preiser, Nigel C Bennett, Tsidiso Maphanga, Nelesh P Govender, Robert Colebunders, Chris Kenyon
The ecological niche of Emergomyces africanus (formerly Emmonsia species), a dimorphic fungus that causes an AIDS-related mycosis in South Africa, is unknown. We hypothesized that natural infection with E. africanus occurs in wild small mammals. Using molecular detection with primers specific for E. africanus, we examined 1402 DNA samples from 26 species of mole-rats, rodents, and insectivores trapped in South Africa that included 1324 lung, 37 kidney, and 41 liver specimens. DNA of E. africanus was not detected in any animals...
September 9, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28953556/uncontrolled-bleeding-of-the-gastrointestinal-tract
#5
Alain D'Hondt, Lionel Haentjens, Nicolas Brassart, Frédéric Flamme, Jean-Charles Preiser
PURPOSE OF REVIEW: Acute gastrointestinal bleeding is a frequent emergency situation, whose incidence will likely rise as a result of the increasing use of direct anticoagulants and of the medical progresses resulting in longer life expectancy with underlying comorbidities. Updated guidelines and improvements in the diagnostic and therapeutic tools are now available and will likely improve the management of massive gastrointestinal bleeding in the near future. RECENT FINDINGS: The assessment of severity has been improved by validated scores useable upon admission...
December 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/28898704/interpretation-of-indeterminate-hiv-1-pcr-results-are-influenced-by-changing-vertical-transmission-prevention-regimens
#6
Jean Maritz, Jayshree Narvin Maharaj, Mark Frederic Cotton, Wolfgang Preiser
BACKGROUND: Suppression of HIV by antiretroviral drugs may be one of the reasons that indeterminate HIV-1 PCR results are obtained from testing HIV-exposed infants. This complicates the early identification of infected infants, potentially delaying initiating treatment early. There is uncertainty as to how different vertical HIV transmission prevention regimens (VTP) affect the rate and predictive value of indeterminate PCR results. OBJECTIVES: To investigate rates of indeterminate PCR results, outcomes of subsequent samples and the predictive value of an indeterminate PCR for a later positive result in the setting of intensifying VTP in the Western Cape province of South Africa...
September 9, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28857824/moderate-levels-of-pre-therapy-drug-resistance-pdr-in-a-generalised-epidemic-time-for-better-first-line-art
#7
Gert U van Zyl, Cornelis J Grobbelaar, Mathilda Claassen, Peter Bock, Wolfgang Preiser
No abstract text is available yet for this article.
August 28, 2017: AIDS
https://www.readbyqxmd.com/read/28765218/dengue-virus-infected-dendritic-cells-but-not-monocytes-activate-natural-killer-cells-through-a-contact-dependent-mechanism-involving-adhesion-molecules
#8
Vivian Vasconcelos Costa, Weijian Ye, Qingfeng Chen, Mauro Martins Teixeira, Peter Preiser, Eng Eong Ooi, Jianzhu Chen
Natural killer (NK) cells play a protective role against dengue virus (DENV) infection, but the cellular and molecular mechanisms are not fully understood. Using an optimized humanized mouse model, we show that human NK cells, through the secretion of gamma interferon (IFN-γ), are critical in the early defense against DENV infection. Depletion of NK cells or neutralization of IFN-γ leads to increased viremia and more severe thrombocytopenia and liver damage in humanized mice. In vitro studies using autologous human NK cells show that DENV-infected monocyte-derived dendritic cells (MDDCs), but not monocytes, activate NK cells in a contact-dependent manner, resulting in upregulation of CD69 and CD25 and secretion of IFN-γ...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28756769/continuous-glucose-monitoring-in-the-icu-clinical-considerations-and-consensus
#9
REVIEW
James S Krinsley, J Geoffrey Chase, Jan Gunst, Johan Martensson, Marcus J Schultz, Fabio S Taccone, Jan Wernerman, Julien Bohe, Christophe De Block, Thomas Desaive, Pierre Kalfon, Jean-Charles Preiser
Glucose management in intensive care unit (ICU) patients has been a matter of debate for almost two decades. Compared to intermittent monitoring systems, continuous glucose monitoring (CGM) can offer benefit in the prevention of severe hyperglycemia and hypoglycemia by enabling insulin infusions to be adjusted more rapidly and potentially more accurately because trends in glucose concentrations can be more readily identified. Increasingly, it is apparent that a single glucose target/range may not be optimal for all patients at all times and, as with many other aspects of critical care patient management, a personalized approach to glucose control may be more appropriate...
July 31, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28756470/a-critical-view-on-primary-and-secondary-outcome-measures-in-nutrition-trials
#10
EDITORIAL
Yaseen M Arabi, Jean-Charles Preiser
No abstract text is available yet for this article.
July 29, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28737574/is-there-a-role-for-enterohormones-in-the-gastroparesis-of-critically-ill-patients
#11
Carlos A Santacruz, Amanda Quintairos, Claudia Righy, Ilaria A Crippa, Lucio Couto, Virginie Imbault, Mongkolpun Wasineeart, Mathieu De Ryckere, Jean-Charles Preiser
OBJECTIVES: Delayed gastric emptying occurs in critically ill patients and impairs the delivery, digestion, and absorption of enteral feeding. A pathophysiologic role of the enterohormones peptide YY and ghrelin is supported by preclinical data. To compare the circulating plasma levels of peptide YY and ghrelin in control subjects and in critically ill patients, during feeding and fasting, and to search for a correlation with gastric emptying. DESIGN: A prospective observational trial...
October 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28732085/point-of-care-screening-for-hepatitis-b-virus-infection-in-pregnant-women-at-an-antenatal-clinic-a-south-african-experience
#12
Nafiisah Chotun, Wolfgang Preiser, Christoffel Johannes van Rensburg, Pedro Fernandez, Gerhard Barnard Theron, Dieter Glebe, Monique Ingrid Andersson
BACKGROUND & AIMS: Elimination of HIV and syphilis mother-to-child transmission (MTCT) has received much attention but little consideration has been given to the possibility of elimination of HBV MTCT. In sub-Saharan Africa, HBV vertical transmission continues to be reported and it remains an important public health problem. This study aimed to assess the feasibility of screening pregnant women for HBV using a point-of-care (POC) test and implementing interventions to prevent HBV MTCT...
2017: PloS One
https://www.readbyqxmd.com/read/28683458/oral-nitrate-increases-microvascular-reactivity-and-the-number-of-visible-perfused-microvessels-in-healthy-volunteers
#13
Louis Kolb, Diego Orbegozo, Jacques Creteur, Jean-Charles Preiser, Jean-Louis Vincent, Daniel De Backer
Nitric oxide (NO) plays an important role in controlling microcirculatory function, but the effects of exogenous administration of nitrate (NO3-) on the microcirculation have not been well studied. We evaluated whether NO3- could influence the microvascular response to hypoxia in 17 healthy volunteers. We used a vascular occlusion test (VOT) to assess the response of near-infrared spectroscopy-derived indexes to hypoxic stress before and 2 h 15 min after oral administration of 800 mg potassium nitrate. We also monitored changes in the sublingual microcirculation using side-stream dark-field (SDF) video microscopy...
2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/28622798/singapore-malaria-network-meeting-singmalnet-2016
#14
EDITORIAL
Peter Preiser, Laurent Renia, Zbynek Bozdech, Kevin Tan, Bruce Russell, Brian M Cooke
No abstract text is available yet for this article.
June 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28599676/a-randomized-trial-of-supplemental-parenteral-nutrition-in-underweight-and-overweight-critically-ill-patients-the-top-up-pilot-trial
#15
Paul E Wischmeyer, Michel Hasselmann, Christine Kummerlen, Rosemary Kozar, Demetrios James Kutsogiannis, Constantine J Karvellas, Beth Besecker, David K Evans, Jean-Charles Preiser, Leah Gramlich, Khursheed Jeejeebhoy, Rupinder Dhaliwal, Xuran Jiang, Andrew G Day, Daren K Heyland
BACKGROUND: Nutrition guidelines recommendations differ on the use of parenteral nutrition (PN), and existing clinical trial data are inconclusive. Our recent observational data show that amounts of energy/protein received early in the intensive care unit (ICU) affect patient mortality, particularly for inadequate nutrition intake in patients with body mass indices (BMIs) of <25 or >35. Thus, we hypothesized increased nutrition delivery via supplemental PN (SPN) + enteral nutrition (EN) to underweight and obese ICU patients would improve 60-day survival and quality of life (QoL) versus usual care (EN alone)...
June 9, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28594576/provision-of-nutrients-to-the-acutely-ill-introducing-the-baby-stomach-concept
#16
Jean-Charles Preiser, Jan Wernerman
No abstract text is available yet for this article.
November 1, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28465193/clinical-outcomes-of-proximal-row-carpectomy-by-preoperative-midcarpal-joint-morphological-classification-viegas-type-i-versus-type-ii
#17
A Toffoli, H Lenoir, C Lazerges, B Coulet, M Chammas
The midcarpal joint can be classified into two anatomical types - Viegas type I and Viegas type II - based on the absence or presence of a medial facet for the hamate on the lunate (lunohamate facet). Type I is associated with a round capitate shape, which theoretically allows better congruence with the lunate fossa of the distal radius following proximal row carpectomy (PRC). This morphological feature has never been considered as a predictive factor of clinical outcome for this surgical procedure. This study aimed to compare the clinical and radiological outcomes of the two Viegas types following PRC...
June 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28409866/p-falciparum-rh5-basigin-interaction-induces-changes-in-the-cytoskeleton-of-the-host-rbc
#18
Yaw Aniweh, Xiaohong Gao, Piliang Hao, Wei Meng, Soak Kuan Lai, Karthigayan Gunalan, Trang T Chu, Ameya Sinha, Julien Lescar, Rajesh Chandramohanadas, Hoi Yeung Li, Siu Kwan Sze, Peter R Preiser
The successful invasion of Plasmodium is an essential step in their life cycle. The parasite reticulocyte-binding protein homologues (RHs) and erythrocyte-binding like proteins are two families involved in the invasion leading to merozoite-red blood cell (RBC) junction formation. Ca(2+) signaling has been shown to play a critical role in the invasion. RHs have been linked to Ca(2+) signaling, which triggers the erythrocyte-binding like proteins release ahead of junction formation, consistent with RHs performing an initial sensing function in identifying suitable RBCs...
April 13, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28374096/the-intensive-care-medicine-research-agenda-in-nutrition-and-metabolism
#19
REVIEW
Yaseen M Arabi, Michael P Casaer, Marianne Chapman, Daren K Heyland, Carole Ichai, Paul E Marik, Robert G Martindale, Stephen A McClave, Jean-Charles Preiser, Jean Reignier, Todd W Rice, Greet Van den Berghe, Arthur R H van Zanten, Peter J M Weijs
PURPOSE: The objectives of this review are to summarize the current practices and major recent advances in critical care nutrition and metabolism, review common beliefs that have been contradicted by recent trials, highlight key remaining areas of uncertainty, and suggest recommendations for the top 10 studies/trials to be done in the next 10 years. METHODS: Recent literature was reviewed and developments and knowledge gaps were summarized. The panel identified candidate topics for future trials in critical care nutrition and metabolism...
April 3, 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/28357965/racial-differences-in-seroprevalence-of-hav-and-hev-in-blood-donors-in-the-western-cape-south-africa-a-clue-to-the-predominant-hev-genotype
#20
T Lopes, R Cable, C Pistorius, T Maponga, S Ijaz, W Preiser, R Tedder, M I Andersson
Hepatitis E virus (HEV) infection is a major cause of acute hepatitis worldwide. This infection causes major water-borne outbreaks in low- and middle-income countries, whilst in industrialised countries this infection is zoonotic. These differences in epidemiology are related to different HEV genotypes. HEV genotype 3 is a zoonotic infection, whilst genotype 2 causes large outbreaks. This study determined the seroprevalence of HEV in blood donors from the Western Cape. Anti-hepatitis A virus (anti-HAV) antibody was detected in 184/300 (61%) donors...
July 2017: Epidemiology and Infection
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