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Viral Diagnostics

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https://www.readbyqxmd.com/read/28814592/fever-and-generalised-lymphadenopathy-in-an-hiv-positive-patient-a-diagnostic-challenge
#1
Bernardo Neves, Pedro Raimundo, Pedro Farinha
Fever and generalised lymphadenopathy is a common presentation of a variety of diseases and a thorough investigation is often necessary for appropriate diagnosis.We present a 53-year-old male patient admitted with fever, weight loss of 15 kg in 3 months and abdominal discomfort. Examination was only remarkable for axillary and inguinal lymphadenopathy. Blood tests showed normocytic normochromic anaemia, cholestasis and a previously unknown HIV-1 infection with lymphocyte CD4 +count of 239 cells/mm(3) and viral load 3...
August 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28814255/current-evidence-on-the-evaluation-and-management-of-fever-without-a-source-in-infants-aged-0-90-days-a-review
#2
Joyee G Vachani, Kenya McNeal-Trice, Sowdhamini S Wallace
BACKGROUND: Despite development of risk stratification tools decades ago, the best strategy for evaluation and management of young infants with fever without a clear source remains uncertain. OBJECTIVE: To describe the variability in current practice and review recently published evidence in three key areas: inflammatory markers as a tool for risk stratification, impact of viral testing, and optimal observation time on antibiotics. METHODS: Articles were identified using PubMed, Scopus, and Cochrane databases and via experts...
August 16, 2017: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/28813773/a-case-of-ivig-induced-aseptic-chemical-meningitis
#3
Anish Patel, Kalyan Chakravarthy Potu, Tamera Sturm
Intravenous immunoglobulin (IVIG) is a commonly used and generally well-tolerated medication. Common side effects include flu-like symptoms such as fevers, headaches, myalgia, fatigue, and nausea. One of the more rare side effects is aseptic meningitis, with a reported incidence rate of around 0.067 percent of all IVIG infusions. In this paper, we describe a 47-year-old female patient with a history of myasthenia gravis who presented with a headache, neck pain, and neck stiffness while undergoing IVIG infusions for a myasthenia crisis...
March 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28812114/-thoracic-and-abdominal-imaging-in-immunocompromised-patients
#4
REVIEW
J R Kroeger, D Maintz, D-H Chang
The number of patients with immunosuppression is rising worldwide. The spectrum of diseases and pathogens in these patients differs widely from that of immunocompetent patients due to frequent opportunistic infections. Symptoms are sometimes unspecific, and imaging plays a key role in the management of these patients. The lungs are a frequent site of infection in immunosuppressed patients. Chest X‑ray is the starting point for radiological diagnostics, but shows only limited sensitivity and specificity for infections with atypical pathogens...
August 15, 2017: Medizinische Klinik, Intensivmedizin und Notfallmedizin
https://www.readbyqxmd.com/read/28810997/cutaneous-leishmaniasis-in-a-saudi-arabian-soldier-stationed-in-the-united-states
#5
Kelly Laurent, Jason Susong, Eric Fillman, Simon Ritchie
BACKGROUND: Leishmaniasis is a common parasitic disease seen in many parts of the world, especially in areas where current U.S. and international forces are deployed. Approximately 350 million people are thought to be at risk of cutaneous leishmaniasis (CL) with an annual incidence of 1.5 million cases. Over 90% of cutaneous infections with Leishmania occur in the Middle East, Brazil, and Peru. Outbreaks of CL may occur in military personnel deployed to endemic areas. Since the incubation period for symptomatic CL ranges from weeks to months, symptoms may not appear until well after returning to the United States...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28809741/hepatitis-c-virus-infection-outcomes-among-immigrants-to-canada-a-retrospective-cohort-analysis
#6
Curtis L Cooper, Kednapa Thavorn, Ecaterina Damian, Daniel J Corsi
INTRODUCTION AND AIM: HCV-infected immigrants contribute to the total prevalence in Canada and other developed nations. Little is known about engagement in care, access to service, and treatment outcomes in recipients of Direct Acting Antiviral (DAA) HCV therapies among immigrants living with HCV. MATERIAL AND METHODS: HCV patients assessed at The Ottawa Hospital Viral Hepatitis Clinic between 2000-2016 were identified. Immigration history, race, socioeconomic status, HCV work-up, treatment and outcome data were evaluated...
August 8, 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28809042/notes-on-the-overlap-measure-as-an-alternative-to-the-youden-index-how-are-they-related
#7
Hani M Samawi, Jingjing Yin, Haresh Rochani, Viral Panchal
The receiver operating characteristic (ROC) curve is frequently used to evaluate and compare diagnostic tests. As one of the ROC summary indices, the Youden index measures the effectiveness of a diagnostic marker and enables the selection of an optimal threshold value (cut-off point) for the marker. Recently, the overlap coefficient, which captures the similarity between 2 distributions directly, has been considered as an alternative index for determining the diagnostic performance of markers. In this case, a larger overlap indicates worse diagnostic accuracy, and vice versa...
August 15, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28808964/visualizing-virus-derived-dsrna-using-antibody-independent-and-dependent-methods
#8
Sarah J Poynter, Stephanie J DeWitte-Orr
Long double-stranded (ds) RNA molecules are produced as a byproduct of viral replication. Studying virus-derived dsRNA is important for understanding virus replication, understanding host responses to virus infections, and as a diagnostic tool for virus presence and replication. Here, we describe four different techniques for visualizing dsRNA; two antibody-dependent methods (immunoblotting and immunocytochemistry), as well as two antibody-independent methods (differential digestion and acridine orange staining)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28807812/evaluation-and-clinical-validation-of-two-field-deployable-reverse-transcription-insulated-isothermal-pcr-assays-for-the-detection-of-the-middle-east-respiratory-syndrome-coronavirus
#9
Yun Young Go, Yeon-Sook Kim, Shinhye Cheon, Sangwoo Nam, Keun Bon Ku, Meehyein Kim, Nam Hyuk Cho, Hyun Park, Pei-Yu Alison Lee, Yu-Chun Lin, Yun-Long Tsai, Hwa-Tang Thomas Wang, Udeni B R Balasuriya
Middle East respiratory syndrome (MERS) is an emerging zoonotic viral respiratory disease that was first identified in Saudi Arabia in 2012. In 2015, the largest MERS outbreak outside of the Middle East region occurred in the Republic of Korea. The rapid nosocomial transmission of MERS-coronavirus (MERS-CoV) in Korean healthcare settings highlighted the importance and urgent need for a rapid and reliable on-site diagnostic assay to implement effective control and preventive measures. Here, we describe the evaluation and validation of two newly developed reverse transcription-insulated isothermal PCR (RT-iiPCR) methods targeting the ORF1a and upE genes of MERS-CoV...
August 11, 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28806922/hepatitis-b-reactivation-characterized-by-hbsag-negativity-and-anti-hbsag-antibodies-persistence-in-haematopoietic-stem-cell-transplanted-patient-after-lamivudine-withdrawal
#10
C Cerva, G Maffongelli, V Svicher, R Salpini, L Colagrossi, A Battisti, B Mariotti, R Cerretti, L Cudillo, L Sarmati
BACKGROUND: HBV reactivation is associated with high mortality rates in hematopoietic stem cell transplantation (HSCT) and prophylactic lamivudine (LMV) treatment is suggested to prevent this phenomenon. However, the duration of LMV treatment in HSCT patients is not fully defined and the time of immune recovery is considered the best parameter for a drug to be safely interrupted. In patients undergoing allogeneic HSCT, the time of immune recovery is not easy to define and may take years after transplantation and prolonged LMV treatments, which can lead to drug-resistant viral strains...
August 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28803727/elimination-of-toxic-microsatellite-repeat-expansion-rna-by-rna-targeting-cas9
#11
Ranjan Batra, David A Nelles, Elaine Pirie, Steven M Blue, Ryan J Marina, Harrison Wang, Isaac A Chaim, James D Thomas, Nigel Zhang, Vu Nguyen, Stefan Aigner, Sebastian Markmiller, Guangbin Xia, Kevin D Corbett, Maurice S Swanson, Gene W Yeo
Microsatellite repeat expansions in DNA produce pathogenic RNA species that cause dominantly inherited diseases such as myotonic dystrophy type 1 and 2 (DM1/2), Huntington's disease, and C9orf72-linked amyotrophic lateral sclerosis (C9-ALS). Means to target these repetitive RNAs are required for diagnostic and therapeutic purposes. Here, we describe the development of a programmable CRISPR system capable of specifically visualizing and eliminating these toxic RNAs. We observe specific targeting and efficient elimination of microsatellite repeat expansion RNAs both when exogenously expressed and in patient cells...
August 8, 2017: Cell
https://www.readbyqxmd.com/read/28803517/evaluation-of-16-commercial-antibody-elisas-for-the-detection-of-bovine-viral-diarrhea-virus-specific-antibodies-in-serum-and-milk-using-well-characterized-sample-panels
#12
Jean-Baptiste Hanon, Miet De Baere, Camille De la Ferté, Sophie Roelandt, Yves Van der Stede, Brigitte Cay
We performed a thorough fit-for-purpose evaluation of commercial ELISAs for the detection of bovine viral diarrhea virus (BVDV)-specific antibodies in serum and in milk by testing 2 panels of well-characterized serum and milk samples. Sixteen ELISAs from 9 different manufacturers, available on the Belgian market at the time of our study, were assessed for their diagnostic and analytical sensitivity (DSe and ASe, respectively), diagnostic specificity (DSp), and repeatability relative to the virus neutralization (VN) test considered to be the gold standard assay...
August 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28802185/diagnostic-yield-and-clinical-impact-of-routine-cell-culture-for-respiratory-viruses-among-children-with-a-negative-multiplex-rt-pcr-result
#13
M AlGhounaim, Y Xiao, C Caya, J Papenburg
BACKGROUND: Polymerase chain reaction (PCR) is the reference standard for respiratory virus testing. However, cell culture may still have added value in identifying viruses not detected by PCR. OBJECTIVES: We aimed to estimate the yield and clinical impact of routine respiratory virus culture among children with a negative PCR result. STUDY DESIGN: A retrospective cohort study was performed from Jan. 2013 to Sept. 2015. Respiratory samples from hospitalized or immunocompromised patients <18years old were routinely inoculated on traditional tube cell culture monolayers if they tested negative by a PCR assay for 12 respiratory viruses...
July 29, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28798919/the-use-of-bioaerosol-sampling-for-airborne-virus-surveillance-in-swine-production-facilities-a-mini-review
#14
REVIEW
Benjamin D Anderson, John A Lednicky, Montserrat Torremorell, Gregory C Gray
Modern swine production facilities typically house dense populations of pigs and may harbor a variety of potentially zoonotic viruses that can pass from one pig generation to another and periodically infect human caretakers. Bioaerosol sampling is a common technique that has been used to conduct microbial risk assessments in swine production, and other similar settings, for a number of years. However, much of this work seems to have been focused on the detection of non-viral microbial agents (i.e., bacteria, fungi, endotoxins, etc...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28797313/intravenous-immunoglobulins-in-children-with-new-onset-dilated-cardiomyopathy
#15
Josephine F Heidendael, Suzanne L Den Boer, Joanne G Wildenbeest, Michiel Dalinghaus, Bart Straver, Dasja Pajkrt
BACKGROUND: Dilated cardiomyopathy is a rare but serious disorder in children. No effective diagnostic or treatment tools are readily available. This study aimed to evaluate the efficacy of intravenous immunoglobulins in children with new onset dilated cardiomyopathy. Methods and results In this retrospective cohort study, 94 children with new onset dilated cardiomyopathy were followed during a median period of 33 months. All patients with secondary dilated cardiomyopathy - for example, genetic, auto-immune or structural defects - had been excluded...
August 11, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28797080/physician-perspectives-on-the-management-of-viral-hepatitis-and-hepatocellular-carcinoma-in-myanmar
#16
Yoona A Kim, Sam Trinh, Si Thura, Khin Pyone Kyi, Thomas Lee, Stan Sze, Adam Richards, Andrew Aronsohn, Grace L H Wong, Yasuhito Tanaka, Geoffrey Dusheiko, Mindie H Nguyen
BACKGROUND: In Myanmar, over five million people are infected with hepatitis B virus (HBV) and hepatitis C virus (HCV). Hepatitis has been a recent focus with the development of a National Strategic Plan on Hepatitis and plans to subsidize HCV treatment. METHODS: During a two-day national liver disease symposium covering HCV, HBV, hepatocellular (HCC), and end-stage liver disease (ESLD), physician surveys were administered using the automated response system (ARS) to assess physician knowledge, perceptions of barriers to screening and treatment, and proposed solutions...
2017: PloS One
https://www.readbyqxmd.com/read/28796045/with-a-little-help-from-a-computer-discriminating-between-bacterial-and-viral-meningitis-based-on-dominance-based-rough-set-approach-analysis
#17
Ewelina Gowin, Danuta Januszkiewicz-Lewandowska, Roman Słowiński, Jerzy Błaszczyński, Michał Michalak, Jacek Wysocki
Differential Diagnosis of bacterial and viral meningitis remains an important clinical problem. A number of methods to assist in the diagnoses of meningitis have been developed, but none of them have been found to have high specificity with 100% sensitivity.We conducted a retrospective analysis of the medical records of 148 children hospitalized in St. Joseph Children's Hospital in Poznań. In this study, we applied for the first time the original methodology of dominance-based rough set approach (DRSA) to diagnostic patterns of meningitis data and represented them by decision rules useful in discriminating between bacterial and viral meningitis...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28794881/procalcitonin-a-promising-diagnostic-marker-for-sepsis-and-antibiotic-therapy
#18
REVIEW
Ashitha L Vijayan, Vanimaya, Shilpa Ravindran, R Saikant, S Lakshmi, R Kartik, Manoj G
BACKGROUND: Sepsis is a global healthcare problem, characterized by whole body inflammation in response to microbial infection, which leads to organ dysfunction. It is becoming a frequent complication in hospitalized patients. Early and differential diagnosis of sepsis is needed critically to avoid unnecessary usage of antimicrobial agents and for proper antibiotic treatments through the screening of biomarkers that sustains with diagnostic significance. MAIN BODY OF ABSTRACT: Current targeting conventional markers (C-reactive protein, white blood cell, tumour necrosis factor-α, interleukins, etc...
2017: Journal of Intensive Care
https://www.readbyqxmd.com/read/28794033/ancient-evolution-and-dispersion-of-human-papillomavirus-type-58-variants
#19
Zigui Chen, Wendy C S Ho, Siaw Shi Boon, Priscilla T Y Law, Martin C W Chan, Rob DeSalle, Robert D Burk, Paul K S Chan
Human papillomavirus type 58 is found in 10-18% of cervical cancers in East Asia but rather uncommon elsewhere. The distribution and oncogenic potential of HPV58 variants appear to be heterogeneous since the E7 T20I/G63S variant is more prevalent in East Asia and confers 7-9 fold higher risk for cervical precancer and cancer. However, the underlying genomic mechanisms that explain the geographic and carcinogenic diversity of HPV58 variants are still poorly understood. In this study, we used a combination of phylogenetic analyses and bioinformatics to investigate the deep evolutionary history of HPV58 complete genome variants...
August 9, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28789967/protein-glycosylation-in-viral-hepatitis-related-hcc-characterization-of-heterogeneity-biological-roles-and-clinical-implications
#20
Shu Zhang, Xinyi Cao, Qiang Gao, Yinkun Liu
Protein glycosylation is one of the most frequent and well-known posttranslational modifications, playing important roles in physiopathological processes. Glycosylation is catalyzed by enzymatic additions of heterogeneous glycans with specific linkage of monosaccharides and, in a preformed fashion, to specific amino acids within glycoproteins. Altered glycan macroheterogeneity and microheterogeneity have been reported in glycoproteins produced mainly by the liver, facilitating tumorigenesis, progression, and metastasis...
August 5, 2017: Cancer Letters
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