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https://www.readbyqxmd.com/read/29778200/the-nucleoside-analog-gs-441524-strongly-inhibits-feline-infectious-peritonitis-fip-virus-in-tissue-culture-and-experimental-cat-infection-studies
#1
B G Murphy, M Perron, E Murakami, K Bauer, Y Park, C Eckstrand, M Liepnieks, N C Pedersen
Feline infectious peritonitis (FIP) is a common and highly lethal coronavirus disease of domestic cats. Recent studies of diseases caused by several RNA viruses in people and other species indicate that antiviral therapy may be effective against FIP in cats. The small molecule nucleoside analog GS-441524 is a molecular precursor to a pharmacologically active nucleoside triphosphate molecule. These analogs act as an alternative substrate and RNA-chain terminator of viral RNA dependent RNA polymerase. We determined that GS-441524 was non-toxic in feline cells at concentrations as high as 100 uM and effectively inhibited FIPV replication in cultured CRFK cells and in naturally infected feline peritoneal macrophages at concentrations as low as 1 uM...
June 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29776363/rapid-detection-of-carbapenemase-activity-of-enterobacteriaceae-isolated-from-positive-blood-cultures-by-maldi-tof-ms
#2
Jiajia Yu, Jingxian Liu, Yuanrui Li, Jing Yu, Weinan Zhu, Ying Liu, Lisong Shen
BACKGROUND: Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has been proved to be a useful tool for identification of pathogens directly isolated from blood cultures in clinical microbiology laboratories. β-Lactam antibiotics are commonly used for treatment of bloodstream infections caused by Enterobacteriaceae strains, and carbapenem is the superlative class of β-lactam antibiotics. Since the carbapenem resistance rate of Enterobacteriaceae strains raised year by year, efficient detection of carbapenemase activity and timely delivery of carbapenem susceptibility reports of Enterobacteriaceae strains isolated from blood cultures is important for clinicians...
May 18, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29775646/the-rna-binding-protein-ars2-supports-hematopoiesis-at-multiple-levels
#3
Seerat Elahi, Shawn M Egan, G Aaron Holling, Rachel L Kandefer, Michael J Nemeth, Scott H Olejniczak
Recent biochemical characterization of Arsenic resistance protein 2 (Ars2) has established it as central to determining the fate of nascent RNA polymerase II (RNAPII) transcripts. Through interactions with the nuclear 5'-7-methylguanosine (7mG) cap binding complex (CBC), Ars2 promotes co-transcriptional processing coupled with nuclear export or degradation of several classes of RNAPII transcripts, allowing for gene expression programs that facilitate rapid and sustained proliferation of immortalized cells in culture...
May 15, 2018: Experimental Hematology
https://www.readbyqxmd.com/read/29775092/a-prospective-multi-centre-us-clinical-trial-to-determine-accuracy-of-febridx-point-of-care-testing-for-acute-upper-respiratory-infections-with-and-without-a-confirmed-fever
#4
Nathan I Shapiro, Wesley H Self, Jeffrey Rosen, Stephan C Sharp, Michael R Filbin, Peter C Hou, Amisha D Parekh, Michael C Kurz, Robert Sambursky
BACKGROUND: FebriDx is a 10-minute disposable point-of-care test designed to identify clinically significant systemic host immune responses and aid in the differentiation of bacterial and viral respiratory infection by simultaneously detecting C-reactive protein (CRP) and myxovirus resistance protein A (MxA) from a fingerstick blood sample. FebriDx diagnostic accuracy was evaluated in the emergency room and urgent care setting. METHODS: A prospective, multicentre, observational cohort study of acute upper respiratory tract infections (URIs), with and without a confirmed fever at the time of enrolment, was performed to evaluate the diagnostic accuracy of FebriDx to identify clinically significant bacterial infection with host response and acute pathogenic viral infection...
May 18, 2018: Annals of Medicine
https://www.readbyqxmd.com/read/29763469/rapid-diagnosis-of-bloodstream-infections-in-the-critically-ill-evaluation-of-the-broad-range-pcr-esi-ms-technology
#5
Martina Tassinari, Silvia Zannoli, Patrizia Farabegoli, Maria Federica Pedna, Anna Pierro, Antonio Mastroianni, Riccardo Fontan, Luciano Luongo, Giuseppe Sarnataro, Elisa Menegatti, Assunta Caruso, Vittorio Sambri
Bloodstream infection (BSI) and associated sepsis represent a major source of mortality in industrialized countries. Prompt treatment with targeted antibiotics affects both the financial impact and the clinical outcome of BSI: every hour gained in initiating the correct antimicrobial therapy significantly increases the probability of patient survival. However, the current standard-of-care, which depends on blood culture-based diagnosis, are often unable to provide such a fast response. Fast and sensitive molecular techniques for the detection of sepsis-related pathogens from primary blood samples are strongly needed...
2018: PloS One
https://www.readbyqxmd.com/read/29762935/septic-shock-meningoencephalitis-and-multiple-pulmonary-emboli-case-report-of-an-uncommon-clinical-presentation-of-ventricular-septal-defect-acute-infective-endocarditis
#6
Laura Varela Barca, Jose López-Menéndez, Ana Redondo Palacios, Jorge Rodríguez-Roda Stuart
The case is reported of a 55 year-old woman, with a previously known congenital septal defect, who was admitted to the emergency department with a diagnosis of meningoencephalitis, septic shock, and rapid clinical deterioration. Echocardiography revealed a vegetation occupying the right-side heart. Endocarditis affectation of the septal defect, aortic and tricuspid valves was noted and blood cultures were positive for Staphylococcus aureus. Urgent surgical treatment was performed whereby the ventricular septal defect was closed, a meticulous debridement of the affected area was conducted, and the aortic and tricuspid valves were replaced...
September 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29756430/-evaluation-of-a-pcr-multiplex-technique-for-the-rapid-diagnosis-of-bacteriemia
#7
M F López-Fabal, J L Gómez-Garcés, M López Lomba, M Ruiz Bastián
OBJECTIVE: Rapid and safe diagnosis of bacteremia is a continuous challenge in clinical microbiology. In this work, we evaluated a multiple PCR system that identifies 23 common pathogens as well as the production of 3 resistance mechanisms potentially present in them. METHODS: During a period of 2 months the positive blood cultures were processed in the usual way for identification and determination of their antimicrobial sensitivity. At the same time were incorporated into FilmArray panels...
May 11, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/29750765/ideal-and-actual-impact-of-rapid-diagnostic-testing-and-antibiotic-stewardship-on-antibiotic-prescribing-and-clinical-outcomes-in-children-with-positive-blood-cultures
#8
Caroline H Reuter, Hannah L Palac, Larry K Kociolek, Xiaotian T Zheng, Yusuf Y Chao, Rupal Patel, Sameer J Patel
BACKGROUND: Implementing matrix assisted laser desorption ionization time of flight (MALDI-TOF) and multiplex PCR (mPCR) has been associated with decreased mortality and hospital length of stay in adults, but the impact in pediatrics is less understood. METHODS: This pre-post quasi-experimental study compared antibiotic prescribing for positive blood cultures in patients ≤21 years collected in 2012 (pre-intervention) and in 2015 (after MALDI-TOF/mPCR). Time to effective and optimal antimicrobial therapy were evaluated using Cox proportional hazards regression...
May 10, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29733508/fast-rapid-determinations-of-antibiotic-susceptibility-phenotypes-using-label-free-cytometry
#9
Tzu-Hsueh Huang, Yih-Ling Tzeng, Robert M Dickson
Sepsis, a life-threatening immune response to blood infections (bacteremia), has a ∼30% mortality rate and is the 10th leading cause of US hospital deaths. The typical bacterial loads in adult septic patients are ≤100 bacterial cells (colony forming units, CFU) per ml blood, while pediatric patients exhibit only ∼1000 CFU/ml. Due to the low numbers, bacteria must be propagated through ∼24-hours blood cultures to generate sufficient CFUs for diagnosis and further analyses. Herein, we demonstrate that, unlike other rapid post-blood culture antibiotic susceptibility tests (ASTs), our phenotypic approach can drastically accelerate ASTs for the most common sepsis-causing gram-negative pathogens by circumventing long blood culture-based amplification...
May 7, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29720430/evaluation-of-a-rapid-diagnostic-test-for-the-detection-of-burkholderia-pseudomallei-in-the-lao-people-s-democratic-republic
#10
Kate L Woods, Latsaniphone Boutthasavong, Caoimhe NicFhogartaigh, Sue J Lee, Viengmon Davong, David P AuCoin, David A B Dance
Burkholderia pseudomallei causes significant global morbidity and mortality, with the highest disease burden in parts of Asia where culture-based diagnosis is often not available. We prospectively evaluated the Active Melioidosis Detect (AMD, InBios International, USA) lateral flow immunoassay (LFI) for rapid detection of B. pseudomallei in turbid blood cultures, pus, sputum, sterile fluid, urine, and sera. Performance was compared to B. pseudomallei detection using monoclonal antibody latex agglutination (LA) and immunofluorescence assays (IFA), with culture as the gold standard...
May 2, 2018: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29720259/human-serum-and-platelet-lysate-are-appropriate-xeno-free-alternatives-for-clinical-grade-production-of-human-mustem-cell-batches
#11
Charlotte Saury, Aurélie Lardenois, Cindy Schleder, Isabelle Leroux, Blandine Lieubeau, Laurent David, Marine Charrier, Laëtitia Guével, Sabrina Viau, Bruno Delorme, Karl Rouger
BACKGROUND: Canine MuStem cells have demonstrated regenerative efficacy in a dog model of muscular dystrophy, and the recent characterization of human counterparts (hMuStem) has highlighted the therapeutic potential of this muscle-derived stem cell population. To date, these cells have only been generated in research-grade conditions. However, evaluation of the clinical efficacy of any such therapy will require the production of hMuStem cells in compliance with good manufacturing practices (GMPs)...
May 2, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29719801/an-unusual-presentation-of-a-case-of-human-psittacosis
#12
Yannick Vande Weygaerde, Charlot Versteele, Elke Thijs, Anton De Spiegeleer, Jerina Boelens, Daisy Vanrompay, Eva Van Braeckel, Karim Vermaelen
Background: Chlamydia psittaci is a gram-negative, obligate intracellular organism. Birds are the main reservoir, but also non-avian domestic animals and humans can be infected. In humans it mostly causes respiratory infections due to occupational exposure with varying severity. Sensitive and specific diagnostic tests are needed to define psittacosis in humans as these tests also allow rapid tracing of the animal source. However, diagnosis in humans is often based on time-consuming culture techniques and antibody detection assays as in many countries, the existing molecular diagnostic tests for psittacosis are not reimbursed by the public health insurance...
2018: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/29712651/resistance-to-echinocandins-in-candida-can-be-detected-by-performing-the-etest-directly-on-blood-culture-samples
#13
María Ángeles Bordallo-Cardona, Laura Judith Marcos-Zambrano, Carlos Sánchez-Carrillo, Emilio Bouza, Patricia Muñoz, Pilar Escribano, Jesús Guinea
Background: We examined the rapid evaluation of susceptibility to echinocandins in Candida spp. using the Etest performed directly on positive blood cultures and anidulafungin-containing agar plates. Methods: We prospectively collected 80 positive blood cultures (Bactec™-FX system, Becton-Dickinson, Cockeysville, Maryland, USA) with echinocandin-susceptible Candida spp (n=60) and echinocandin-intermediate C. parapsilosis (n=20) from patients with candidemia. Additionally, blood culture bottles of nonfungemic/bacteremic patients were spiked with 35 echinocandin-resistant Candida spp...
April 30, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29705416/use-of-maldi-tof-to-characterize-staphylococcal-intramammary-infections-in-dairy-goats
#14
Véronique Bernier Gosselin, Jessica Lovstad, Simon Dufour, Pamela R F Adkins, John R Middleton
The most common pathogens causing intramammary infections (IMI) in dairy goats are staphylococci. Gene sequencing has been the reference method for identification of staphylococcal species, but MALDI-TOF mass spectrometry could represent a rapid and cost-effective alternative method. The objectives were to evaluate the typeability and accuracy of partial gene sequencing and MALDI-TOF for identifying staphylococci isolated from caprine milk samples, and to evaluate the relationship between staphylococcal species IMI, milk somatic cell score (SCS), and milk yield (MY)...
April 25, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29703037/fatal-malignant-pertussis-with-hyperleukocytosis-in-a-chinese-infant-a-case-report-and-literature-review
#15
Shu-Feng Tian, Hong-Mei Wang, Ji-Kui Deng
RATIONALE: Pertussis has re-emerged on a global scale and is an ongoing public health problem, even in countries with high rates of vaccination. Hyperleukocytosis [white blood cell (WBC) count >100 × 10/L] is a rare complication that strongly predicts mortality in cases of severe pertussis. PATIENT CONCERNS: We report a case of severe pertussis in an infant who initially presented with persistent cyanotic cough, tachypnea, and grunting. The infant's condition deteriorated rapidly, and she was transferred to the pediatric intensive care unit (PICU) during her third hour of hospitalization...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29700761/development-and-first-evaluation-of-a-novel-multiplex-real-time-pcr-on-whole-blood-samples-for-rapid-pathogen-identification-in-critically-ill-patients-with-sepsis
#16
Kirsten van de Groep, Martine P Bos, Paul H M Savelkoul, Anna Rubenjan, Christel Gazenbeek, Willem J G Melchers, Tom van der Poll, Nicole P Juffermans, David S Y Ong, Marc J M Bonten, Olaf L Cremer
Molecular tests may enable early adjustment of antimicrobial therapy and be complementary to blood culture (BC) which has imperfect sensitivity in critically ill patients. We evaluated a novel multiplex real-time PCR assay to diagnose bloodstream pathogens directly in whole blood samples (BSI-PCR). BSI-PCR included 11 species- and four genus-specific PCRs, a molecular Gram-stain PCR, and two antibiotic resistance markers. We collected 5 mL blood from critically ill patients simultaneously with clinically indicated BC...
April 26, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29697131/powering-ex-vivo-tissue-models-in-microfluidic-systems
#17
REVIEW
Ian C McLean, Luke A Schwerdtfeger, Stuart A Tobet, Charles S Henry
This Frontiers review analyzes the rapidly growing microfluidic strategies that have been employed in attempts to create physio relevant 'organ-on-chip' models using primary tissue removed from a body (human or animal). Tissue harvested immediately from an organism, and cultured under artificial conditions is referred to as ex vivo tissue. The use of primary (organotypic) tissue offers unique benefits over traditional cell culture experiments, and microfluidic technology can be used to further exploit these advantages...
April 26, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29692776/interleukin-15-cultured-dendritic-cells-enhance-anti-tumor-gamma-delta-t-cell-functions-through-il-15-secretion
#18
Heleen H Van Acker, Sébastien Anguille, Hans De Reu, Zwi N Berneman, Evelien L Smits, Viggo F Van Tendeloo
Dendritic cell (DC) vaccination can be an effective post-remission therapy for acute myeloid leukemia (AML). Yet, current DC vaccines do not encompass the ideal stimulatory triggers for innate gamma delta (γδ) T cell anti-tumor activity. Promoting type 1 cytotoxic γδ T cells in patients with AML is, however, most interesting, considering these unconventional T cells are primed for rapid function and exert meaningful control over AML. In this work, we demonstrate that interleukin (IL)-15 DCs have the capacity to enhance the anti-tumoral functions of γδ T cells...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29686180/chromobacterium-violaceum-the-deadly-sepsis
#19
Guntur Darmawan, R N Yasmin Kusumawardhani, Bachti Alisjahbana, Trinugroho Heri Fadjari
Chromobacterium violaceum is a Gram-negative facultatively anaerobic, oxidase-positive bacterium producing a dark violet antioxidant pigment called violacein. It is an opportunistic pathogen and has an ubiquitous distribution, mainly resides in water and soil of tropical and subtropical regions.An-18-year-old man referred to the emergency room with a 5-day history of progressively worsening swelling of the right cheek. He sought consult and hospitalized at another institution for three days prior this admission; however, his condition deteriorated...
January 2018: Acta Medica Indonesiana
https://www.readbyqxmd.com/read/29684106/urine-antigen-detection-as-an-aid-to-diagnose-invasive-aspergillosis
#20
Kieren A Marr, Kausik Datta, Seema Mehta, Darin B Ostrander, Michelle Rock, Jesse Francis, Marta Feldmesser
Background: Establishing rapid diagnoses of invasive aspergillosis (IA) is priority, given poor outcomes of late therapy. Non-culture based tests that detect galactomannan and β-D glucan are available, but are technically cumbersome and rely on invasive sampling (blood or bronchoalveolar lavage). Methods: We optimized a lateral flow dipstick assay using the galactofuranose -specific monoclonal antibody (mAb476), which was previously shown to recognize urine antigens after Aspergillus fumigatus pulmonary infection in an`imals...
April 19, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
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