512 results on '"Wilkins K"'
Search Results
202. Vitamin E sequestration by liver fat in humans.
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Violet PC, Ebenuwa IC, Wang Y, Niyyati M, Padayatty SJ, Head B, Wilkins K, Chung S, Thakur V, Ulatowski L, Atkinson J, Ghelfi M, Smith S, Tu H, Bobe G, Liu CY, Herion DW, Shamburek RD, Manor D, Traber MG, and Levine M
- Subjects
- Adolescent, Adult, Cell Line, Female, Hep G2 Cells, Humans, Kinetics, Lipids, Lipoproteins, Liver metabolism, Obesity, Young Adult, alpha-Tocopherol administration & dosage, alpha-Tocopherol pharmacokinetics, Fatty Liver drug therapy, Vitamin E administration & dosage, Vitamin E pharmacokinetics
- Abstract
BACKGROUNDWe hypothesized that obesity-associated hepatosteatosis is a pathophysiological chemical depot for fat-soluble vitamins and altered normal physiology. Using α-tocopherol (vitamin E) as a model vitamin, pharmacokinetics and kinetics principles were used to determine whether excess liver fat sequestered α-tocopherol in women with obesity-associated hepatosteatosis versus healthy controls.METHODSCustom-synthesized deuterated α-tocopherols (d3- and d6-α-tocopherols) were administered to hospitalized healthy women and women with hepatosteatosis under investigational new drug guidelines. Fluorescently labeled α-tocopherol was custom-synthesized for cell studies.RESULTSIn healthy subjects, 85% of intravenous d6-α-tocopherol disappeared from the circulation within 20 minutes but reappeared within minutes and peaked at 3-4 hours; d3- and d6-α-tocopherols localized to lipoproteins. Lipoprotein redistribution occurred only in vivo within 1 hour, indicating a key role of the liver in uptake and re-release. Compared with healthy subjects who received 2 mg, subjects with hepatosteatosis had similar d6-α-tocopherol entry rates into liver but reduced initial release rates (P < 0.001). Similarly, pharmacokinetics parameters were reduced in hepatosteatosis subjects, indicating reduced hepatic d6-α-tocopherol output. Reductions in kinetics and pharmacokinetics parameters in hepatosteatosis subjects who received 2 mg were echoed by similar reductions in healthy subjects when comparing 5- and 2-mg doses. In vitro, fluorescent-labeled α-tocopherol localized to lipid in fat-loaded hepatocytes, indicating sequestration.CONCLUSIONSThe unique role of the liver in vitamin E physiology is dysregulated by excess liver fat. Obesity-associated hepatosteatosis may produce unrecognized hepatic vitamin E sequestration, which might subsequently drive liver disease. Our findings raise the possibility that hepatosteatosis may similarly alter hepatic physiology of other fat-soluble vitamins.TRIAL REGISTRATIONClinicalTrials.gov, NCT00862433.FUNDINGNational Institute of Diabetes and Digestive and Kidney Diseases and NIH grants DK053213-13, DK067494, and DK081761.
- Published
- 2020
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203. The health status of the early care and education workforce in the USA: a scoping review of the evidence and current practice.
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Lessard LM, Wilkins K, Rose-Malm J, and Mazzocchi MC
- Abstract
Background: More than two million early care and education (ECE) providers care for young children in the USA each day. These providers tend to earn low wages and many are enrolled in public assistance programs. Nearly all ECE providers are female and they are disproportionately women of color. Despite the fact that these attributes place the ECE workforce at greater risk of chronic disease, the health status of the workforce is not established and the availability and effectiveness of interventions to improve their health status is also not known., Methods: We conducted a scoping review of both the published literature and current practice to identify all articles and interventions targeting the health status of the ECE workforce. Our search strategy identified scientific articles published in English within the past 10 years as well as any interventions targeting the ECE workforce that have been implemented within the past 3 years. Data from both scientific articles and practice were extracted using systematic methods and summarized., Results: Thirteen studies described some component of physical health including diet quality (11 studies), physical activity (8 studies), and height/weight/body mass index (7 studies), and 21 studies assessed component(s) of mental health including depression (15 studies), stress (8 studies), and mindfulness (3 studies). ECE providers reported a high prevalence of overweight, obesity, and chronic disease diagnoses and spend significant time being sedentary, and some report low diet quality. Mental health concerns in this population include depression and high stress. Eleven interventions targeting ECE workforce wellness were also identified; most focused on nutrition, physical activity and/or stress., Conclusion: The limited evidence available for review describes a workforce in need of health promotion interventions to address high levels of mental and physical health challenges, some above and beyond peers with comparable demographic characteristics. Several promising interventions were identified from both the published and unpublished literature; these interventions should be further implemented and evaluated to assess their impact on the workforce., Competing Interests: Competing interestsThe authors declare that they have no competing interests., (© The Author(s). 2020.)
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- 2020
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204. Inter- and intra-individual variability of active glucagon-like peptide 1 among healthy adults.
- Author
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Sylvetsky AC, Bauman V, Abdelhadi J, Blau JE, Wilkins KJ, and Rother KI
- Abstract
Objective: To determine whether sex, age, and body mass index are correlated with active glucagon-like-peptide 1 concentrations and to investigate glucagon-like-peptide 1 reproducibility during repeated oral glucose tolerance tests., Methods: Sixty-one healthy volunteers underwent four 2-hour repeated oral glucose tolerance tests approximately 1 week apart. Because this randomized same-subject crossover trial was designed to investigate effects of non-nutritive sweeteners, participants received 355 mL (12 ounces) of water or a beverage containing non-nutritive sweeteners 10 minutes prior to each oral glucose tolerance test. Blood samples were collected 10 minutes before, and 0, 10, 20, 30, 60, 90, and 120 minutes following ingestion of 75 grams of glucose., Results: Basal active glucagon-like-peptide 1, peak glucagon-like-peptide 1, and glucagon-like-peptide 1 area-under-the-curve were higher in men than women (all p ≤0.04), adjusting for body mass index and age. Fasting and stimulated active glucagon-like-peptide 1 results were highly reproducible with little within-subject variability (between-subjects to within-subject variability ratio 4.2 and 3.5 for fasting glucagon-like-peptide 1 and glucagon-like-peptide 1 area-under-the-curve)., Conclusion: Men had higher active glucagon-like-peptide 1 concentrations than women. In contrast to considerable inter-individual variability of basal and stimulated active glucagon-like-peptide 1 concentrations, intra-individual variability was low, consistent with tight physiological regulation., Competing Interests: Competing interests None of the authors have any conflicts of interest to report.
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- 2020
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205. Preemptive Tecovirimat Use in an Active Duty Service Member Who Presented With Acute Myeloid Leukemia After Smallpox Vaccination.
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Lindholm DA, Fisher RD, Montgomery JR, Davidson W, Yu PA, Yu YC, Burgado J, Wilkins K, Petersen BW, and Okulicz JF
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- Adult, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Humans, Immunoglobulins, Intravenous therapeutic use, Leukemia, Myeloid, Acute etiology, Leukemia, Myeloid, Acute therapy, Male, Premedication, Smallpox Vaccine administration & dosage, Symptom Assessment, Treatment Outcome, Vaccinia virus immunology, Antiviral Agents administration & dosage, Benzamides administration & dosage, Isoindoles administration & dosage, Leukemia, Myeloid, Acute diagnosis, Military Personnel, Smallpox prevention & control, Smallpox Vaccine adverse effects, Smallpox Vaccine immunology, Vaccination adverse effects, Vaccination methods, Vaccinia virus drug effects
- Abstract
Smallpox vaccine is contraindicated in immunosuppression due to increased risk for adverse reactions (eg, progressive vaccinia). We describe the first-ever use of tecovirimat as a preemptive vaccinia virus treatment strategy during induction chemotherapy in an active duty service member who presented with acute leukemia and inadvertent autoinoculation after smallpox vaccination., (Published by Oxford University Press for the Infectious Diseases Society of America 2019.)
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- 2019
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206. Novel Treatment of a Vaccinia Virus Infection from an Occupational Needlestick - San Diego, California, 2019.
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Whitehouse ER, Rao AK, Yu YC, Yu PA, Griffin M, Gorman S, Angel KA, McDonald EC, Manlutac AL, de Perio MA, McCollum AM, Davidson W, Wilkins K, Ortega E, Satheshkumar PS, Townsend MB, Isakari M, and Petersen BW
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- Adult, California, Female, Humans, Laboratory Personnel, Needlestick Injuries virology, Occupational Diseases therapy, Occupational Injuries virology, Vaccinia therapy
- Abstract
Vaccinia virus (VACV) is an orthopoxvirus used in smallpox vaccines, as a vector for novel cancer treatments, and for experimental vaccine research (1). The Advisory Committee on Immunization Practices (ACIP) recommends smallpox vaccination for laboratory workers who handle replication-competent VACV (1). For bioterrorism preparedness, the U.S. government stockpiles tecovirimat, the first Food and Drug Administration-approved antiviral for treatment of smallpox (caused by variola virus and globally eradicated in 1980*
,† ) (2). Tecovirimat has activity against other orthopoxviruses and can be administered under a CDC investigational new drug protocol. CDC was notified about an unvaccinated laboratory worker with a needlestick exposure to VACV, who developed a lesion on her left index finger. CDC and partners performed laboratory confirmation, contacted the study sponsor to identify the VACV strain, and provided oversight for the first case of laboratory-acquired VACV treated with tecovirimat plus intravenous vaccinia immunoglobulin (VIGIV). This investigation highlights 1) the misconception among laboratory workers about the virulence of VACV strains; 2) the importance of providing laboratorians with pathogen information and postexposure procedures; and 3) that although tecovirimat can be used to treat VACV infections, its therapeutic benefit remains unclear., Competing Interests: All authors have completed and submitted the International Committee of Medical Journal Editors form for disclosure of potential conflicts of interest. Marcia Isakari’s institution received consulting fees for posttreatment laboratory testing of this patient by the contract research organization sponsored by the study manufacturer of vaccinia virus. No other potential conflicts of interest were disclosed.- Published
- 2019
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207. Effects of supplemental butyrate and weaning on rumen fermentation in Holstein calves.
- Author
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McCurdy DE, Wilkins KR, Hiltz RL, Moreland S, Klanderman K, and Laarman AH
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- Animals, Body Weight, Cattle, Fatty Acids, Volatile metabolism, Fermentation, Male, Milk, Rumen metabolism, Animal Feed analysis, Butyrates pharmacology, Diet veterinary, Rumen drug effects, Weaning
- Abstract
The objectives of this study were to determine the effects of the weaning transition and supplemental rumen-protected butyrate on subacute ruminal acidosis, feed intake, and growth parameters. Holstein bull calves (n = 36; age = 10.7 ± 4.1 d; ± standard deviation) were assigned to 1 of 4 treatment groups: 2 preweaning groups, animals fed milk replacer only (PRE-M) and those fed milk replacer, calf starter, and hay (PRE-S); and 2 postweaning groups, animals fed milk replacer, calf starter, and hay without supplemental rumen-protected butyrate (POST-S) or with supplemental rumen-protected butyrate at a rate of 1% wt/wt during the 2-wk weaning transition (POST-B). Milk replacer was provided at 1,200 g/d; starter, water, and hay were provided ad libitum. Weaning took place over 14 d by reducing milk replacer provision to 900 g/d in wk 7, 600 g/d in wk 8, and 0 g/d in wk 9. Rumen pH was measured continuously for 7 d during wk 6 for PRE-S and PRE-M and during wk 9 for POST-S and POST-B. After rumen pH was measured for 7 d, calves were euthanized, and rumen fluid was sampled and analyzed for volatile fatty acid (VFA) profile. Individual feed intake was recorded daily, whereas, weekly, body weights were recorded, and blood samples were collected. Compared with PRE-M, PRE-S calves tended to have a greater total VFA concentration (35.60 ± 11.4 vs. 11.90 ± 11.8 mM) but mean rumen pH was unaffected (6.25 ± 0.22 vs. 6.17 ± 0.21, respectively). Between PRE-S (wk 6) and POST-S (wk 9), calf starter intake increased (250 ± 219 vs. 2,239 ± 219 g/d), total VFA concentrations increased (35.6 ± 11.4 vs. 154.4 ± 11.8 mM), but mean rumen pH was unaffected (6.25 ± 0.22 vs. 6.40 ± 0.22, respectively). Compared with POST-S, POST-B calves had greater starter intake in wk 7, 8, and 9, but POST-B tended to have lower total VFA concentration (131.0 ± 11.8 vs. 154.4 ± 11.8 mM) and lower mean ruminal pH (5.83 ± 0.21 vs. 6.40 ± 0.22). In conclusion, the weaning transition does not appear to affect rumen pH and VFA profile, but supplementing rumen-protected butyrate during the weaning transition increased starter intake and average daily gain. Further, these data suggest that the ability of the rumen to manage rumen pH changes fundamentally postweaning. Why weaned calves with lower rumen pH can achieve higher calf starter intakes is unclear; these data suggest the effect of rumen pH on feed intake differs between calves and cows., (Copyright © 2019 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.)
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- 2019
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208. Outbreak of human monkeypox in Nigeria in 2017-18: a clinical and epidemiological report.
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Yinka-Ogunleye A, Aruna O, Dalhat M, Ogoina D, McCollum A, Disu Y, Mamadu I, Akinpelu A, Ahmad A, Burga J, Ndoreraho A, Nkunzimana E, Manneh L, Mohammed A, Adeoye O, Tom-Aba D, Silenou B, Ipadeola O, Saleh M, Adeyemo A, Nwadiutor I, Aworabhi N, Uke P, John D, Wakama P, Reynolds M, Mauldin MR, Doty J, Wilkins K, Musa J, Khalakdina A, Adedeji A, Mba N, Ojo O, Krause G, and Ihekweazu C
- Subjects
- Adult, Animals, Exanthema etiology, Female, Fever etiology, Humans, Male, Monkeypox virus isolation & purification, Nigeria epidemiology, Whole Genome Sequencing, Disease Outbreaks, Mpox (monkeypox) diagnosis, Mpox (monkeypox) epidemiology, Monkeypox virus genetics
- Abstract
Background: In September, 2017, human monkeypox re-emerged in Nigeria, 39 years after the last reported case. We aimed to describe the clinical and epidemiological features of the 2017-18 human monkeypox outbreak in Nigeria., Methods: We reviewed the epidemiological and clinical characteristics of cases of human monkeypox that occurred between Sept 22, 2017, and Sept 16, 2018. Data were collected with a standardised case investigation form, with a case definition of human monkeypox that was based on previously established guidelines. Diagnosis was confirmed by viral identification with real-time PCR and by detection of positive anti-orthopoxvirus IgM antibodies. Whole-genome sequencing was done for seven cases. Haplotype analysis results, genetic distance data, and epidemiological data were used to infer a likely series of events for potential human-to-human transmission of the west African clade of monkeypox virus., Findings: 122 confirmed or probable cases of human monkeypox were recorded in 17 states, including seven deaths (case fatality rate 6%). People infected with monkeypox virus were aged between 2 days and 50 years (median 29 years [IQR 14]), and 84 (69%) were male. All 122 patients had vesiculopustular rash, and fever, pruritus, headache, and lymphadenopathy were also common. The rash affected all parts of the body, with the face being most affected. The distribution of cases and contacts suggested both primary zoonotic and secondary human-to-human transmission. Two cases of health-care-associated infection were recorded. Genomic analysis suggested multiple introductions of the virus and a single introduction along with human-to-human transmission in a prison facility., Interpretation: This study describes the largest documented human outbreak of the west African clade of the monkeypox virus. Our results suggest endemicity of monkeypox virus in Nigeria, with some evidence of human-to-human transmission. Further studies are necessary to explore animal reservoirs and risk factors for transmission of the virus in Nigeria., Funding: None., (Copyright © 2019 World Health Organization. Published by Elsevier Ltd. All rights reserved. Published by Elsevier Ltd.. All rights reserved.)
- Published
- 2019
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209. Genome of Alaskapox Virus, A Novel Orthopoxvirus Isolated from Alaska.
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Gigante CM, Gao J, Tang S, McCollum AM, Wilkins K, Reynolds MG, Davidson W, McLaughlin J, Olson VA, and Li Y
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- Alaska, DNA, Viral genetics, Genetic Variation, Humans, Open Reading Frames, Orthopoxvirus classification, Phylogeny, Poxviridae Infections virology, Recombination, Genetic, Sequence Analysis, DNA, Viral Proteins genetics, Genome, Viral genetics, Orthopoxvirus genetics
- Abstract
Since the eradication of smallpox, there have been increases in poxvirus infections and the emergence of several novel poxviruses that can infect humans and domestic animals. In 2015, a novel poxvirus was isolated from a resident of Alaska. Diagnostic testing and limited sequence analysis suggested this isolate was a member of the Orthopoxvirus ( OPXV ) genus but was highly diverged from currently known species, including Akhmeta virus . Here, we present the complete 210,797 bp genome sequence of the Alaska poxvirus isolate, containing 206 predicted open reading frames. Phylogenetic analysis of the conserved central region of the genome suggested the Alaska isolate shares a common ancestor with Old World OPXVs and is diverged from New World OPXVs. We propose this isolate as a member of a new OPXV species, Alaskapox virus ( AKPV ). The AKPV genome contained host range and virulence genes typical of OPXVs but lacked homologs of C4L and B7R, and the hemagglutinin gene contained a unique 120 amino acid insertion. Seven predicted AKPV proteins were most similar to proteins in non-OPXV Murmansk or NY_014 poxviruses. Genomic analysis revealed evidence suggestive of recombination with Ectromelia virus in two putative regions that contain seven predicted coding sequences, including the A-type inclusion protein., Competing Interests: The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
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- 2019
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210. Underrepresented faculty play a disproportionate role in advancing diversity and inclusion.
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Jimenez MF, Laverty TM, Bombaci SP, Wilkins K, Bennett DE, and Pejchar L
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- Humans, Male, Biology, Faculty
- Abstract
A diverse and inclusive scientific community is more productive, innovative and impactful, yet ecology and evolutionary biology continues to be dominated by white male faculty. We quantify faculty engagement in activities related to diversity and inclusion and identify factors that either facilitate or hinder participation. Through a nationwide survey, we show that faculty with underrepresented identities disproportionally engage in diversity and inclusion activities, yet such engagement was not considered important for tenure. Faculty perceived time and funding as major limitations, which suggests that institutions should reallocate resources and reconsider how faculty are evaluated to promote shared responsibility in advancing diversity and inclusion.
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- 2019
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211. Enhancement of Medical Student Attitudes in the Treatment of Patients with Substance Use Disorders: a Follow-up Study.
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De Aquino JP, Moore DT, Wilkins K, and Fuehrlein B
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- Follow-Up Studies, Humans, Substance-Related Disorders psychology, Attitude, Students, Medical psychology, Substance-Related Disorders therapy
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- 2019
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212. Statistical methods for building better biomarkers of chronic kidney disease.
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Pencina MJ, Parikh CR, Kimmel PL, Cook NR, Coresh J, Feldman HI, Foulkes A, Gimotty PA, Hsu CY, Lemley K, Song P, Wilkins K, Gossett DR, Xie Y, and Star RA
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- Adult, Aged, Cost-Benefit Analysis, Humans, Middle Aged, Prognosis, Risk Assessment statistics & numerical data, Biomarkers, Models, Statistical, Renal Insufficiency, Chronic physiopathology
- Abstract
The last two decades have witnessed an explosion in research focused on the development and assessment of novel biomarkers for improved prognosis of diseases. As a result, best practice standards guiding biomarker research have undergone extensive development. Currently, there is great interest in the promise of biomarkers to enhance research efforts and clinical practice in the setting of chronic kidney disease, acute kidney injury, and glomerular disease. However, some have questioned whether biomarkers currently add value to the clinical practice of nephrology. The current state of the art pertaining to statistical analyses regarding the use of such measures is critical. In December 2014, the National Institute of Diabetes and Digestive and Kidney Diseases convened a meeting, "Toward Building Better Biomarker Statistical Methodology," with the goals of summarizing the current best practice recommendations and articulating new directions for methodological research. This report summarizes its conclusions and describes areas that need attention. Suggestions are made regarding metrics that should be commonly reported. We outline the methodological issues related to traditional metrics and considerations in prognostic modeling, including discrimination and case mix, calibration, validation, and cost-benefit analysis. We highlight the approach to improved risk communication and the value of graphical displays. Finally, we address some "new frontiers" in prognostic biomarker research, including the competing risk framework, the use of longitudinal biomarkers, and analyses in distributed research networks., (© 2019 John Wiley & Sons, Ltd.)
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- 2019
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213. A Delphi-Based Consensus Statement on the Management of Anticoagulated Patients With Botulinum Toxin for Limb Spasticity.
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Boulias C, Ismail F, Phadke CP, Bagg S, Bureau I, Charest S, Chen R, Cheng A, Ethans K, Fink M, Finlayson H, Gulasingam S, Guo M, Haziza M, Hosseini H, Khan O, Lang M, Lapp T, Leckey R, Li Pi Shan R, Liem N, Lo A, Mason M, McNeil S, McVeigh S, Miller T, Mills PB, Naud P, O'Connell C, Petitclerc M, Prevost J, Reebye R, Richardson D, Satkunam L, Sharma S, Short C, Sirois G, Unarket M, Wein T, Wilkins K, and Winston P
- Subjects
- Adult, Botulinum Toxins, Type A adverse effects, Canada, Consensus, Contraindications, Drug, Delphi Technique, Female, Hemorrhage chemically induced, Humans, Injections, Intramuscular, International Normalized Ratio, Leg, Male, Middle Aged, Muscle, Skeletal, Needles, Neuromuscular Agents adverse effects, Risk Factors, Surveys and Questionnaires, Anticoagulants adverse effects, Botulinum Toxins, Type A administration & dosage, Muscle Spasticity drug therapy, Neuromuscular Agents administration & dosage
- Abstract
Objective: To create a consensus statement on the considerations for treatment of anticoagulated patients with botulinum toxin A (BoNTA) intramuscular injections for limb spasticity., Design: We used the Delphi method., Setting: A multiquestion electronic survey., Participants: Canadian physicians (N=39) who use BoNTA injections for spasticity management in their practice., Interventions: After the survey was sent, there were e-mail discussions to facilitate an understanding of the issues underlying the responses. Consensus for each question was reached when agreement level was ≥75%., Main Outcome Measures: Not applicable., Results: When injecting BoNTA in anticoagulated patients: (1) BoNTA injections should not be withheld regardless of muscles injected; (2) a 25G or smaller size needle should be used when injecting into the deep leg compartment muscles; (3) international normalized ratio (INR) level should be ≤3.5 when injecting the deep leg compartment muscles; (4) if there are clinical concerns such as history of a fluctuating INR, recent bleeding, excessive or new bruising, then an INR value on the day of injection with point-of-care testing or within the preceding 2-3 days should be taken into consideration when injecting deep compartment muscles; (5) the concern regarding bleeding when using direct oral anticoagulants (DOACs) should be the same as with warfarin (when INR is in the therapeutic range); (6) the dose and scheduling of DOACs should not be altered for the purpose of minimizing the risk of bleeding prior to BoNTA injections., Conclusions: These consensus statements provide a framework for physicians to consider when injecting BoNTA for spasticity in anticoagulated patients. These consensus statements are not strict guidelines or decision-making steps, but rather an effort to generate common understanding in the absence of evidence in the literature., (Copyright © 2018 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.)
- Published
- 2018
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214. MutLγ promotes repeat expansion in a Fragile X mouse model while EXO1 is protective.
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Zhao X, Zhang Y, Wilkins K, Edelmann W, and Usdin K
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- Animals, DNA Mismatch Repair genetics, DNA Mismatch Repair physiology, DNA Repair, DNA Repair Enzymes physiology, Disease Models, Animal, Exodeoxyribonucleases physiology, Fragile X Mental Retardation Protein genetics, Genomic Instability, Mice, Mice, Inbred C57BL, Mice, Knockout, MutL Protein Homolog 1 metabolism, MutL Proteins metabolism, Mutation, Trinucleotide Repeat Expansion genetics, DNA Repair Enzymes genetics, Exodeoxyribonucleases genetics, Fragile X Syndrome genetics, MutL Proteins genetics
- Abstract
The Fragile X-related disorders (FXDs) are Repeat Expansion Diseases resulting from an expansion of a CGG-repeat tract at the 5' end of the FMR1 gene. The mechanism responsible for this unusual mutation is not fully understood. We have previously shown that mismatch repair (MMR) complexes, MSH2/MSH3 (MutSβ) and MSH2/MSH6 (MutSα), together with Polβ, a DNA polymerase important for base excision repair (BER), are important for expansions in a mouse model of these disorders. Here we show that MLH1/MLH3 (MutLγ), a protein complex that can act downstream of MutSβ in MMR, is also required for all germ line and somatic expansions. However, exonuclease I (EXO1), which acts downstream of MutL proteins in MMR, is not required. In fact, a null mutation in Exo1 results in more extensive germ line and somatic expansions than is seen in Exo1+/+ animals. Furthermore, mice homozygous for a point mutation (D173A) in Exo1 that eliminates its nuclease activity but retains its native conformation, shows a level of expansion that is intermediate between Exo1+/+ and Exo1-/- animals. Thus, our data suggests that expansion of the FX repeat in this mouse model occurs via a MutLγ-dependent, EXO1-independent pathway, with EXO1 protecting against expansion both in a nuclease-dependent and a nuclease-independent manner. Our data thus have implications for the expansion mechanism and add to our understanding of the genetic factors that may be modifiers of expansion risk in humans., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2018
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215. Notes from the Field: Responding to an Outbreak of Monkeypox Using the One Health Approach - Nigeria, 2017-2018.
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Eteng WE, Mandra A, Doty J, Yinka-Ogunleye A, Aruna S, Reynolds MG, McCollum AM, Davidson W, Wilkins K, Saleh M, Ipadeola O, Manneh L, Anebonam U, Abdulkareem Z, Okoli N, Agenyi J, Dan-Nwafor C, Mahmodu I, and Ihekweazu C
- Subjects
- Animals, Humans, Mpox (monkeypox) epidemiology, Nigeria epidemiology, Disease Outbreaks prevention & control, Mpox (monkeypox) prevention & control, One Health
- Abstract
Competing Interests: All authors have completed and submitted the ICMJE form for disclosure of potential conflicts of interest. No potential conflicts of interest were disclosed.
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- 2018
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216. Reemergence of Human Monkeypox in Nigeria, 2017.
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Yinka-Ogunleye A, Aruna O, Ogoina D, Aworabhi N, Eteng W, Badaru S, Mohammed A, Agenyi J, Etebu EN, Numbere TW, Ndoreraho A, Nkunzimana E, Disu Y, Dalhat M, Nguku P, Mohammed A, Saleh M, McCollum A, Wilkins K, Faye O, Sall A, Happi C, Mba N, Ojo O, and Ihekweazu C
- Subjects
- Animals, Child, Communicable Diseases, Emerging diagnosis, Communicable Diseases, Emerging transmission, Exanthema pathology, Exanthema virology, Humans, Male, Nigeria epidemiology, Population Surveillance, Communicable Diseases, Emerging epidemiology, Communicable Diseases, Emerging virology, Disease Outbreaks, Mpox (monkeypox) epidemiology, Mpox (monkeypox) virology, Monkeypox virus classification, Monkeypox virus genetics, Zoonoses
- Abstract
In Nigeria, before 2017 the most recent case of human monkeypox had been reported in 1978. By mid-November 2017, a large outbreak caused by the West African clade resulted in 146 suspected cases and 42 laboratory-confirmed cases from 14 states. Although the source is unknown, multiple sources are suspected.
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- 2018
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217. Novel Poxvirus in Proliferative Lesions of Wild Rodents in East Central Texas, USA.
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Hodo CL, Mauldin MR, Light JE, Wilkins K, Tang S, Nakazawa Y, Emerson GL, Ritter JM, Mansell JL, and Hamer SA
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- Animal Diseases diagnosis, Animals, Epidermis pathology, Epidermis ultrastructure, Epidermis virology, Genes, Viral, Male, Mice, Phylogeny, Texas epidemiology, Zoonoses, Animal Diseases epidemiology, Animal Diseases virology, Poxviridae classification, Poxviridae physiology, Poxviridae Infections veterinary, Rodentia
- Abstract
Northern pygmy mice from 2 localities in East Central Texas, USA, had proliferative epidermal lesions on the tail and feet. Electron microscopy of lesion tissue revealed poxvirus. Phylogenetic analyses indicated the virus differed 35% from its closest relatives, the Chordopoxvirinae. Future research is needed to determine whether this virus could affect human health.
- Published
- 2018
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218. Multi-site evaluation of the LN34 pan-lyssavirus real-time RT-PCR assay for post-mortem rabies diagnostics.
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Gigante CM, Dettinger L, Powell JW, Seiders M, Condori REC, Griesser R, Okogi K, Carlos M, Pesko K, Breckenridge M, Simon EMM, Chu MYJV, Davis AD, Brunt SJ, Orciari L, Yager P, Carson WC, Hartloge C, Saliki JT, Sanchez S, Deldari M, Hsieh K, Wadhwa A, Wilkins K, Peredo VY, Rabideau P, Gruhn N, Cadet R, Isloor S, Nath SS, Joseph T, Gao J, Wallace R, Reynolds M, Olson VA, and Li Y
- Subjects
- Animals, Diagnosis, Humans, Lyssavirus genetics, RNA, Viral genetics, Rabies diagnosis, Rabies genetics, Real-Time Polymerase Chain Reaction methods, Reverse Transcriptase Polymerase Chain Reaction methods
- Abstract
Rabies is a fatal zoonotic disease that requires fast, accurate diagnosis to prevent disease in an exposed individual. The current gold standard for post-mortem diagnosis of human and animal rabies is the direct fluorescent antibody (DFA) test. While the DFA test has proven sensitive and reliable, it requires high quality antibody conjugates, a skilled technician, a fluorescence microscope and diagnostic specimen of sufficient quality. The LN34 pan-lyssavirus real-time RT-PCR assay represents a strong candidate for rabies post-mortem diagnostics due to its ability to detect RNA across the diverse Lyssavirus genus, its high sensitivity, its potential for use with deteriorated tissues, and its simple, easy to implement design. Here, we present data from a multi-site evaluation of the LN34 assay in 14 laboratories. A total of 2,978 samples (1,049 DFA positive) from Africa, the Americas, Asia, Europe, and the Middle East were tested. The LN34 assay exhibited low variability in repeatability and reproducibility studies and was capable of detecting viral RNA in fresh, frozen, archived, deteriorated and formalin-fixed brain tissue. The LN34 assay displayed high diagnostic specificity (99.68%) and sensitivity (99.90%) when compared to the DFA test, and no DFA positive samples were negative by the LN34 assay. The LN34 assay produced definitive findings for 80 samples that were inconclusive or untestable by DFA; 29 were positive. Five samples were inconclusive by the LN34 assay, and only one sample was inconclusive by both tests. Furthermore, use of the LN34 assay led to the identification of one false negative and 11 false positive DFA results. Together, these results demonstrate the reliability and robustness of the LN34 assay and support a role for the LN34 assay in improving rabies diagnostics and surveillance.
- Published
- 2018
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219. Genome Sequences of Akhmeta Virus, an Early Divergent Old World Orthopoxvirus.
- Author
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Gao J, Gigante C, Khmaladze E, Liu P, Tang S, Wilkins K, Zhao K, Davidson W, Nakazawa Y, Maghlakelidze G, Geleishvili M, Kokhreidze M, Carroll DS, Emerson G, and Li Y
- Subjects
- Africa, Western, Congo, Cowpox virus genetics, DNA, Viral genetics, Monkeypox virus genetics, Phenotype, Phylogeny, Recombination, Genetic, Sequence Analysis, DNA, Variola virus genetics, Whole Genome Sequencing, Genome, Viral, Orthopoxvirus classification, Orthopoxvirus genetics
- Abstract
Annotated whole genome sequences of three isolates of the Akhmeta virus (AKMV), a novel species of orthopoxvirus (OPXV), isolated from the Akhmeta and Vani regions of the country Georgia, are presented and discussed. The AKMV genome is similar in genomic content and structure to that of the cowpox virus (CPXV), but a lower sequence identity was found between AKMV and Old World OPXVs than between other known species of Old World OPXVs. Phylogenetic analysis showed that AKMV diverged prior to other Old World OPXV. AKMV isolates formed a monophyletic clade in the OPXV phylogeny, yet the sequence variability between AKMV isolates was higher than between the monkeypox virus strains in the Congo basin and West Africa. An AKMV isolate from Vani contained approximately six kb sequence in the left terminal region that shared a higher similarity with CPXV than with other AKMV isolates, whereas the rest of the genome was most similar to AKMV, suggesting recombination between AKMV and CPXV in a region containing several host range and virulence genes.
- Published
- 2018
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220. A Focused Addiction Curriculum and Its Impact on Student Knowledge, Attitudes, and Confidence in the Treatment of Patients with Substance Use.
- Author
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Feeley RJ, Moore DT, Wilkins K, and Fuehrlein B
- Subjects
- Adult, Female, Humans, Male, Attitude of Health Personnel, Clinical Clerkship standards, Curriculum standards, Health Knowledge, Attitudes, Practice, Psychiatry education, Self Efficacy, Students, Medical, Substance-Related Disorders
- Abstract
Background: Assessment of attitudes towards addiction in medical students has largely gone unexplored. This study examines the impact of a supplemental substance use disorder curriculum in the psychiatry clerkship on medical student attitudes towards addiction., Methods: The curriculum was only administered to students at one clerkship site. Subsequently, medical students were surveyed across all sites regarding their attitudes towards addiction., Results: The survey response rate was 37.5% (N = 75/200), with 25 (33%) completing the supplemental addiction curriculum. In bivariate analysis, medical students receiving the curriculum were more likely to express confidence in managing patients with alcohol and opiate use disorders (T = 2.01, p = 0.05) and were more knowledgeable about Alcoholics Anonymous (AA) as a treatment option available to patients (T = 2.27, p = 0.03)., Conclusions: A supplemental addiction curriculum can improve medical student confidence in managing substance-using patients as well as improve knowledge of AA.
- Published
- 2018
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221. Propofol Drug Shortage Associated With Worse Postoperative Nausea and Vomiting Outcomes Despite a Mitigation Strategy.
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Neff MP, Wagner D, Phillips BJ, Shanks A, Thompson A, Wilkins K, Naughton N, and Voepel-Lewis T
- Abstract
Drug shortages negatively affect patient care and outcomes. Postoperative nausea and vomiting (PONV) can be mitigated using risk assessment and prophylaxis. A 2012 propofol shortage provided an opportunity to study the impact of using prophylactic antiemetics and changing the technique from a propofol infusion to inhaled agents in an ambulatory surgery setting. We retrospectively collected data for 2,090 patients regarding PONV risk factors, anesthetic management, and PONV outcomes for periods before, during, and after the shortage. Patients during the propofol shortage experienced a higher incidence of PONV (11% vs 5% before the shortage), greater need for rescue antiemetics (3% vs 1%), and longer duration of stay (mean [SD] = 124 [115] minutes vs 118 [108] minutes). More patients in this group reported PONV at home (14% vs 7%), and 2 required unplanned admission or return to the hospital. During the shortage, patients had a 2-fold increase in the odds of PONV when adjusted for all risk factors. Antiemetics moderated the association between gender and PONV but did not change the effect of the shortage. Findings suggest that despite mitigation efforts, the inability to use propofol infusion was associated with worse PONV outcomes., Competing Interests: The authors have declared no financial relationships with any commercial entity related to the content of this article. The authors did discuss offlabel use within the article., (Copyright© by the American Association of Nurse Anesthetists.)
- Published
- 2018
222. Demonstration of the Use of Remote Temperature Monitoring Devices in Vaccine Refrigerators in Haiti.
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Cavallaro KF, Francois J, Jacques R, Mentor D, Yalcouye I, Wilkins K, Mueller N, Turner R, Wallace A, and Tohme RA
- Subjects
- Cold Temperature, Costs and Cost Analysis, Drug Storage economics, Haiti, Humans, Refrigeration economics, Refrigeration methods, Remote Sensing Technology economics, Remote Sensing Technology methods, Drug Storage methods, Refrigeration instrumentation, Remote Sensing Technology instrumentation, Vaccines
- Abstract
After the 2010 earthquake, Haiti committed to introducing 4 new antigens into its routine immunization schedule, which required improving its cold chain (ie, temperature-controlled supply chain) and increasing vaccine storage capacity by installing new refrigerators. We tested the feasibility of using remote temperature monitoring devices (RTMDs) in Haiti in a sample of vaccine refrigerators fueled by solar panels, propane gas, or electricity. We analyzed data from 16 RTMDs monitoring 24 refrigerators in 15 sites from March through August 2014. Although 5 of the 16 RTMDs exhibited intermittent data gaps, we identified typical temperature patterns consistent with refrigerator door opening and closing, propane depletion, thermostat insufficiency, and overstocking. Actual start-up, annual maintenance, and annual electricity costs for using RTMDs were $686, $179, and $9 per refrigerator, respectively. In Haiti, RTMD use was feasible. RTMDs could be prioritized for use with existing refrigerators with high volumes of vaccines and new refrigerators to certify their functionality before use. Vaccine vial monitors could provide additional useful information about cumulative heat exposure and possible vaccine denaturation.
- Published
- 2018
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223. Characterization of Eptesipoxvirus, a novel poxvirus from a microchiropteran bat.
- Author
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Tu SL, Nakazawa Y, Gao J, Wilkins K, Gallardo-Romero N, Li Y, Emerson GL, Carroll DS, and Upton C
- Subjects
- Animals, DNA, Viral genetics, Genome, Viral genetics, Molecular Sequence Annotation methods, Orthopoxvirus genetics, Vaccinia virus genetics, Viral Proteins genetics, Virulence genetics, Chiroptera virology, Poxviridae genetics
- Abstract
The genome of Eptesipoxvirus (EPTV) is the first poxvirus genome isolated from a microbat. The 176,688 nt sequence, which is believed to encompass the complete coding region of the virus, is 67% A+T and is predicted to encode 191 genes. 11 of these genes have no counterpart in GenBank and are therefore unique to EPTV. The presence of a distantly related ortholog of Vaccinia virus F5L in EPTV uncovered a link with fragmented F5L orthologs in Molluscum contagiosum virus/squirrelpox and clade II viruses. Consistent with the unique position of EPTV approximately mid-point between the orthopoxviruses and the clade II viruses, EPTV has 11 genes that are specific to the orthopoxviruses and 13 genes that are typical, if not exclusive, to the clade II poxviruses. This mosaic nature of EPTV blurs the distinction between the old description of the orthopoxvirus and clade II groups. Genome annotation and characterization failed to find any common virulence genes shared with the other poxvirus isolated from bat (pteropoxvirus); however, EPTV encodes 3 genes that may have been transferred to or from deerpox and squirrelpox viruses; 2 of these, a putative endothelin-like protein and a MHC class I-like protein are likely to have immunomodulatory roles.
- Published
- 2017
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224. Individually Linked Household and Health Facility Vaccination Survey in 12 At-risk Districts in Kinshasa Province, Democratic Republic of Congo: Methods and Metadata.
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Burnett E, Wannemuehler K, Ngoie Mwamba G, Yolande M, Guylain K, Muriel NN, Cathy N, Patrice T, Wilkins K, and Yoloyolo N
- Subjects
- Cluster Analysis, Cross-Sectional Studies, Democratic Republic of the Congo epidemiology, Humans, Infant, Metadata, Surveys and Questionnaires, Family Characteristics, Health Facilities statistics & numerical data, Vaccination statistics & numerical data
- Abstract
Health facility (HF) and household (HH) data can complement each other to provide a better understanding of the factors that contribute to vaccination status. In 12 zones with low vaccination coverage within Kinshasa Province, Democratic Republic of Congo, we conducted 2 surveys: (1) a linked HH and HF survey among 6-11-month-old infants, and (2) a HH survey among 12-23-month-old children. Linked survey objectives were to identify factors associated with vaccination status and to explore methodological considerations for linked survey implementation. To provide linked HH and HF data, we enrolled 6-11-month-old infants in HH clusters in each zone and then surveyed HFs located within the 12 zones and cited by caregivers of the enrolled infants as the most recent HF visited for vaccination or curative care. To provide vaccination coverage estimates for the 12-zone area, we enrolled 12-23-month-old children in every fourth HH. Of the HHs with a child aged 6-23 months, 16% were ineligible because they had resided in the neighborhood for <3 months or were unavailable to be interviewed, 4% refused, and 80% were eligible and participated. Of 1224 enrolled infants 6-11 months of age, records of 879 (72%) were linked to one of the 182 surveyed HFs. For the coverage survey, 710 children aged 12-23 months participated. Home-based vaccination cards were available for 1210 of 1934 children (63%) surveyed. The surveys were successful in assessing HH information for 2 age groups, documenting written vaccination history for a large proportion of 6-23-month-old children, linking the majority of infants with their most recently visited HF, and surveying identified HFs. The implementation of the individually linked survey also highlighted the need for a comprehensive list of HFs and an analysis plan that addresses cross-classified clusters with only 1 child., (© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America.)
- Published
- 2017
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225. Novel Orthopoxvirus Infection in an Alaska Resident.
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Springer YP, Hsu CH, Werle ZR, Olson LE, Cooper MP, Castrodale LJ, Fowler N, McCollum AM, Goldsmith CS, Emerson GL, Wilkins K, Doty JB, Burgado J, Gao J, Patel N, Mauldin MR, Reynolds MG, Satheshkumar PS, Davidson W, Li Y, and McLaughlin JB
- Subjects
- Alaska, Animals, Antibodies, Viral blood, DNA, Viral blood, Female, Fomites virology, Humans, Mammals virology, Microscopy, Electron, Middle Aged, Orthopoxvirus classification, Orthopoxvirus genetics, Orthopoxvirus ultrastructure, Phylogeny, Sequence Analysis, DNA, Skin pathology, Skin virology, Orthopoxvirus isolation & purification, Poxviridae Infections diagnosis, Poxviridae Infections virology
- Abstract
Background.: Human infection by orthopoxviruses is being reported with increasing frequency, attributed in part to the cessation of smallpox vaccination and concomitant waning of population-level immunity. In July 2015, a female resident of interior Alaska presented to an urgent care clinic with a dermal lesion consistent with poxvirus infection. Laboratory testing of a virus isolated from the lesion confirmed infection by an Orthopoxvirus., Methods.: The virus isolate was characterized by using electron microscopy and nucleic acid sequencing. An epidemiologic investigation that included patient interviews, contact tracing, and serum testing, as well as environmental and small-mammal sampling, was conducted to identify the infection source and possible additional cases., Results.: Neither signs of active infection nor evidence of recent prior infection were observed in any of the 4 patient contacts identified. The patient's infection source was not definitively identified. Potential routes of exposure included imported fomites from Azerbaijan via the patient's cohabiting partner or wild small mammals in or around the patient's residence. Phylogenetic analyses demonstrated that the virus represents a distinct and previously undescribed genetic lineage of Orthopoxvirus, which is most closely related to the Old World orthopoxviruses., Conclusions.: Investigation findings point to infection of the patient after exposure in or near Fairbanks. This conclusion raises questions about the geographic origins (Old World vs North American) of the genus Orthopoxvirus. Clinicians should remain vigilant for signs of poxvirus infection and alert public health officials when cases are suspected., (Published by Oxford University Press for the Infectious Diseases Society of America 2017. This work is written by (a) US Government employee(s) and is in the public domain in the US.)
- Published
- 2017
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226. A rapid Orthopoxvirus purification protocol suitable for high-containment laboratories.
- Author
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Hughes L, Wilkins K, Goldsmith CS, Smith S, Hudson P, Patel N, Karem K, Damon I, Li Y, Olson VA, and Satheshkumar PS
- Subjects
- Animals, Containment of Biohazards, Humans, Laboratories, Time Factors, Orthopoxvirus isolation & purification, Virology methods
- Abstract
Virus purification in a high-containment setting provides unique challenges due to barrier precautions and operational safety approaches that are not necessary in lower biosafety level (BSL) 2 environments. The need for high risk group pathogen diagnostic assay development, anti-viral research, pathogenesis and vaccine efficacy research necessitates work in BSL-3 and BSL-4 labs with infectious agents. When this work is performed in accordance with BSL-4 practices, modifications are often required in standard protocols. Classical virus purification techniques are difficult to execute in a BSL-3 or BSL-4 laboratory because of the work practices used in these environments. Orthopoxviruses are a family of viruses that, in some cases, requires work in a high-containment laboratory and due to size do not lend themselves to simpler purification methods. Current CDC purification techniques of orthopoxviruses uses 1,1,2-trichlorotrifluoroethane, commonly known as Genetron
® . Genetron® is a chlorofluorocarbon (CFC) that has been shown to be detrimental to the ozone and has been phased out and the limited amount of product makes it no longer a feasible option for poxvirus purification purposes. Here we demonstrate a new Orthopoxvirus purification method that is suitable for high-containment laboratories and produces virus that is not only comparable to previous purification methods, but improves on purity and yield., (Published by Elsevier B.V.)- Published
- 2017
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227. Safety and immunogenicity of a recombinant Staphylococcus aureus α-toxoid and a recombinant Panton-Valentine leukocidin subunit, in healthy adults.
- Author
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Landrum ML, Lalani T, Niknian M, Maguire JD, Hospenthal DR, Fattom A, Taylor K, Fraser J, Wilkins K, Ellis MW, Kessler PD, Fahim RE, and Tribble DR
- Subjects
- Adjuvants, Immunologic administration & dosage, Adolescent, Adult, Alum Compounds administration & dosage, Antibodies, Bacterial blood, Antibodies, Neutralizing blood, Bacterial Toxins genetics, Double-Blind Method, Drug-Related Side Effects and Adverse Reactions epidemiology, Drug-Related Side Effects and Adverse Reactions pathology, Exotoxins genetics, Female, Healthy Volunteers, Hemolysin Proteins genetics, Humans, Immunoglobulin G blood, Leukocidins genetics, Male, Middle Aged, Placebos administration & dosage, Staphylococcal Vaccines administration & dosage, Staphylococcal Vaccines genetics, Toxoids genetics, Vaccines, Synthetic administration & dosage, Vaccines, Synthetic adverse effects, Vaccines, Synthetic genetics, Vaccines, Synthetic immunology, Young Adult, Bacterial Toxins immunology, Exotoxins immunology, Hemolysin Proteins immunology, Leukocidins immunology, Staphylococcal Infections prevention & control, Staphylococcal Vaccines adverse effects, Staphylococcal Vaccines immunology, Toxoids immunology
- Abstract
We conducted a randomized, double-blind, placebo-controlled dose-escalation study in healthy adults to evaluate the safety and immunogenicity of recombinant Staphylococcus aureus candidate vaccine antigens, recombinant α-toxoid (rAT) and a sub-unit of Panton-Valentine leukocidin (rLukS-PV). 176 subjects were enrolled and randomized within 1 of 11 treatment cohorts: monovalent rAT or rLukS-PV dosages of 10, 25, 50, and 100 μg; bivalent rAT:rLukS dosages of 10:10, 25:25, and 50:50 μg; and alum or saline placebo. All subjects were assessed at Days 0, 7, 14, 28, and 84. Subjects in the 50:50 μg bivalent cohort received a second injection on Day 84 and were assessed on Days 98 and 112. Incidence and severity of reactogenicity and adverse events (AEs) were compared. Geometric mean serum concentrations (GMC) and neutralizing activity of anti-rAT and anti-rLukS-PV IgG were assessed. Reactogenicity incidence was significantly higher in vaccine than placebo recipients (77% versus 55%, respectively; p = 0.006). However, 77% of reactogenicity events were mild and 19% were moderate in severity. The AE incidence and severity were similar between the cohorts. All monovalent and bivalent rAT dosages resulted in a significant increase in the anti-rAT IgG and anti- rLukS-PV GMCs between day 0 and 28 compared with placebo, and persisted through Day 84. Exploratory subgroup analyses suggested a higher GMC and neutralizing antibody titers for the 50 μg monovalent or bivalent rAT and rLukS-PV dose as compared to the other doses. No booster effect was observed after administration of the second dose. We conclude that the rAT and rLukS-PV vaccine formulations were well-tolerated and had a favorable immunogenicity profile, producing antibody with neutralizing activity through day 84. There was no benefit observed with a booster dose of the vaccine.
- Published
- 2017
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228. AAGP Statement on Immigration Executive Order February 7, 2017.
- Author
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Sewell D and Wilkins K
- Subjects
- Government Regulation, Humans, Islam, United States, Workforce, Emigration and Immigration legislation & jurisprudence, Foreign Medical Graduates supply & distribution, Geriatric Psychiatry
- Published
- 2017
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229. Detection and Molecular Characterization of Zoonotic Poxviruses Circulating in the Amazon Region of Colombia, 2014.
- Author
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Usme-Ciro JA, Paredes A, Walteros DM, Tolosa-Pérez EN, Laiton-Donato K, Pinzón MD, Petersen BW, Gallardo-Romero NF, Li Y, Wilkins K, Davidson W, Gao J, Patel N, Nakazawa Y, Reynolds MG, Satheshkumar PS, Emerson GL, and Páez-Martínez A
- Subjects
- Adolescent, Adult, Animals, Cattle, Child, Colombia epidemiology, Farmers, Female, Humans, Male, Middle Aged, Phylogeny, Poxviridae Infections epidemiology, Vaccinia epidemiology, Vaccinia virus genetics, Young Adult, Poxviridae Infections virology, Pseudocowpox Virus isolation & purification, Vaccinia virology, Vaccinia virus isolation & purification
- Abstract
During 2014, cutaneous lesions were reported in dairy cattle and farmworkers in the Amazon Region of western Colombia. Samples from 6 patients were analyzed by serologic and PCR testing, and results demonstrated the presence of vaccinia virus and pseudocowpox virus. These findings highlight the need for increased poxvirus surveillance in Colombia.
- Published
- 2017
- Full Text
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230. The educational value of inpatient psychiatric training in undergraduate medical education.
- Author
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Capurso N and Wilkins K
- Subjects
- Humans, Clinical Clerkship organization & administration, Education, Medical, Undergraduate methods, Psychiatry education, Students, Medical psychology
- Published
- 2017
- Full Text
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231. Evaluation of the GeneXpert for Human Monkeypox Diagnosis.
- Author
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Li D, Wilkins K, McCollum AM, Osadebe L, Kabamba J, Nguete B, Likafi T, Balilo MP, Lushima RS, Malekani J, Damon IK, Vickery MCL, Pukuta E, Nkawa F, Karhemere S, Tamfum JM, Okitolonda EW, Li Y, and Reynolds MG
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Child, Child, Preschool, Democratic Republic of the Congo epidemiology, Female, Humans, Infant, Infant, Newborn, Male, Middle Aged, Mpox (monkeypox) epidemiology, Point-of-Care Systems, Sensitivity and Specificity, Young Adult, Mpox (monkeypox) diagnosis, Mpox (monkeypox) genetics, Monkeypox virus genetics, Polymerase Chain Reaction methods
- Abstract
Monkeypox virus (MPXV), a zoonotic orthopoxvirus (OPX), is endemic in the Democratic Republic of Congo (DRC). Currently, diagnostic assays for human monkeypox (MPX) focus on real-time quantitative polymerase chain reaction (PCR) assays, which are typically performed in sophisticated laboratory settings. Herein, we evaluated the accuracy and utility of a multiplex MPX assay using the GeneXpert platform, a portable rapid diagnostic device that may serve as a point-of-care test to diagnose infections in endemic areas. The multiplex MPX/OPX assay includes a MPX-specific PCR test, OPX-generic PCR test, and an internal control PCR test. In total, 164 diagnostic specimens (50 crusts and 114 vesicular swabs) were collected from suspected MPX cases in Tshuapa Province, DRC, under national surveillance guidelines. The specimens were tested with the GeneXpert MPX/OPX assay and an OPX PCR assay at the Institut National de Recherche Biomedicale (INRB) in Kinshasa. Aliquots of each specimen were tested in parallel with a MPX-specific PCR assay at the Centers for Disease Control and Prevention. The results of the MPX PCR were used as the gold standard for all analyses. The GeneXpert MPX/OPX assay performed at INRB had a sensitivity of 98.8% and specificity of 100%. The GeneXpert assay performed well with both crust and vesicle samples. The GeneXpert MPX/OPX test incorporates a simple methodology that performs well in both laboratory and field conditions, suggesting its viability as a diagnostic platform that may expand and expedite current MPX detection capabilities., Competing Interests: M. C. L. Vickery works for a company whose product is represented in this article., (© The American Society of Tropical Medicine and Hygiene.)
- Published
- 2017
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232. A Pan-Lyssavirus Taqman Real-Time RT-PCR Assay for the Detection of Highly Variable Rabies virus and Other Lyssaviruses.
- Author
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Wadhwa A, Wilkins K, Gao J, Condori Condori RE, Gigante CM, Zhao H, Ma X, Ellison JA, Greenberg L, Velasco-Villa A, Orciari L, and Li Y
- Subjects
- Animals, Humans, Lyssavirus genetics, Rabies diagnosis, Rabies virus genetics, Rhabdoviridae Infections diagnosis, Sensitivity and Specificity, Lyssavirus isolation & purification, Rabies veterinary, Rabies virology, Rabies virus isolation & purification, Reverse Transcriptase Polymerase Chain Reaction methods, Rhabdoviridae Infections veterinary, Rhabdoviridae Infections virology
- Abstract
Rabies, resulting from infection by Rabies virus (RABV) and related lyssaviruses, is one of the most deadly zoonotic diseases and is responsible for up to 70,000 estimated human deaths worldwide each year. Rapid and accurate laboratory diagnosis of rabies is essential for timely administration of post-exposure prophylaxis in humans and control of the disease in animals. Currently, only the direct fluorescent antibody (DFA) test is recommended for routine rabies diagnosis. Reverse-transcription polymerase chain reaction (RT-PCR) based diagnostic methods have been widely adapted for the diagnosis of other viral pathogens, but there is currently no widely accepted rapid real-time RT-PCR assay for the detection of all lyssaviruses. In this study, we demonstrate the validation of a newly developed multiplex real-time RT-PCR assay named LN34, which uses a combination of degenerate primers and probes along with probe modifications to achieve superior coverage of the Lyssavirus genus while maintaining sensitivity and specificity. The primers and probes of the LN34 assay target the highly conserved non-coding leader region and part of the nucleoprotein (N) coding sequence of the Lyssavirus genome to maintain assay robustness. The probes were further modified by locked nucleotides to increase their melting temperature to meet the requirements for an optimal real-time RT-PCR assay. The LN34 assay was able to detect all RABV variants and other lyssaviruses in a validation panel that included representative RABV isolates from most regions of the world as well as representatives of 13 additional Lyssavirus species. The LN34 assay was successfully used for both ante-mortem and post-mortem diagnosis of over 200 clinical samples as well as field derived surveillance samples. This assay represents a major improvement over previously published rabies specific RT-PCR and real-time RT-PCR assays because of its ability to universally detect RABV and other lyssaviruses, its high throughput capability and its simplicity of use, which can be quickly adapted in a laboratory to enhance the capacity of rabies molecular diagnostics. The LN34 assay provides an alternative approach for rabies diagnostics, especially in rural areas and rabies endemic regions that lack the conditions and broad experience required to run the standard DFA assay., Competing Interests: I have read the journal's policy and the authors of this manuscript have the following competing interests: Patents has been filed for assays described in this manuscript through CDC Technology Transfer Office/NIH Office.
- Published
- 2017
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233. Comparing three methods of computerised cognitive training for older adults with subclinical cognitive decline.
- Author
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Gooding AL, Choi J, Fiszdon JM, Wilkins K, Kirwin PD, van Dyck CH, Devanand D, Bell MD, and Rivera Mindt M
- Subjects
- Aged, Aged, 80 and over, Female, Humans, Male, Memory, Neuropsychological Tests, Verbal Learning, Cognitive Dysfunction rehabilitation, Neurological Rehabilitation methods, Therapy, Computer-Assisted methods
- Abstract
Cognitive rehabilitation for mild cognitive impairment (MCI) and early Alzheimer's disease is readily available to the geriatric population. Initial evidence suggests that techniques incorporating motivational strategies to enhance treatment engagement may provide more benefit than computerised training alone. Seventy four adults with subclinical cognitive decline were randomly assigned to computerised cognitive training (CCT), Cognitive Vitality Training (CVT), or an Active Control Group (ACG), and underwent neuropsychological evaluations at baseline and four-month follow-up. Significant differences were found in changes in performance on the Modified Mini Mental State Examination (mMMSE) and measures of verbal learning and memory across treatment groups. Experimental groups showed greater preservation of functioning on the mMMSE than the ACG group, the CVT group performed better than the ACG group on one measure of verbal learning and both measures of verbal memory, and the CCT group performed better than the ACG group on one measure of verbal learning and one measure of verbal memory. There were no significant group differences between the CVT and CCT groups on measures of verbal learning or memory. It was concluded that computerised cognitive training may offer the most benefit when incorporated into a therapeutic milieu rather than administered alone, although both appear superior to more generic forms of cognitive stimulation.
- Published
- 2016
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234. Vegetation community change in Atlantic oak woodlands along a nitrogen deposition gradient.
- Author
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Wilkins K and Aherne J
- Subjects
- Conservation of Natural Resources, Ireland, Nitrogen metabolism, Quercus metabolism, Soil chemistry, Soil Pollutants metabolism, Biodiversity, Forests, Nitrogen analysis, Quercus physiology, Soil Pollutants analysis
- Abstract
Atlantic old sessile oak woodlands are of high conservation importance in Europe, listed in the European Union (EU) Habitats Directive Annex I, and known for their rich bryophyte communities. Their conservation status ranges from unfavourable to bad across their known distribution, which is predominantly within the UK and Ireland, but also extends into Iberia and Brittany. The objectives of this study were to determine if nitrogen (N) deposition, a known driver of terrestrial biodiversity loss, was a significant predictor of community composition in old sessile oak woodlands (i.e., EU Habitats Directive Annex I class: 91A0), and to identify significant changes in individual plant species and community-level abundance (i.e., change points) along an N deposition gradient. Relevé data from 260 Irish oak woodland plots were evaluated using Canonical Correspondence Analysis (CCA) and Threshold Indicator Taxa ANalysis (TITAN). Nitrogen deposition accounted for 14% of the explainable variation in the dataset (inertia = 0.069, p < 0.005). A community scale change point of 13.2 kg N ha(-1) yr(-1) was indicated by TITAN, which falls within the current recommended critical load (CL) range for acidophilous Quercus-dominated (oak) woodlands (10-15 kg N ha(-1) yr(-1)). The results suggest that the current CL is sufficient for maintaining a core group of indicator species in old sessile oak woodlands, but many nutrient sensitive species may disappear even at the CL range minimum., (Copyright © 2016 Elsevier Ltd. All rights reserved.)
- Published
- 2016
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235. Membranous nephropathy: Pilot study of a novel regimen combining cyclosporine and Rituximab.
- Author
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Waldman M, Beck LH Jr, Braun M, Wilkins K, Balow JE, and Austin HA 3rd
- Abstract
Introduction: There is broad consensus that high grade basal proteinuria and failure to achieve remission of proteinuria are key determinants of adverse renal prognosis in patients with primary membranous nephropathy. Based on the fact that current regimens are not ideal due to short and long-term toxicity and propensity to relapse after treatment withdrawal, we developed a treatment protocol based on a novel combination of rituximab and cyclosporine which targets both the B and T cell limbs of the immune system. Herein, we report pilot study data on proteinuria, changes in autoantibody levels and renal function that offer a potentially effective new approach to treatment of severe membranous nephropathy., Methods: Thirteen high-risk patients defined by sustained high-grade proteinuria (mean 10.8 g/d) received combination induction therapy with rituximab plus cyclosporine for 6 months, followed by a second cycle of rituximab and tapering of cyclosporine during an 18 month maintenance phase., Results: Mean proteinuria decreased by 65% at 3 months and by 80% at 6 months. Combined complete or partial remission was achieved in 92% of patients by 9 months; 54% achieved complete remission at 12 months. Two patients relapsed during the trial. All patients with autoantibodies to PLA
2 R achieved antibody depletion. Renal function stabilized. The regimen was well tolerated., Discussion: We report these encouraging preliminary results for their potential value to other investigators needing prospectively collected data to inform the design and power calculations of future randomized clinical trials. Such trials will be needed to formally compare this novel regimen to current therapies for membranous nephropathy.- Published
- 2016
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236. Prescribing "Off-Label": What Should a Physician Disclose?
- Author
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Furey K and Wilkins K
- Subjects
- Aged, 80 and over, Female, Humans, Decision Making ethics, Dementia drug therapy, Disclosure ethics, Drug Prescriptions, Ethics, Medical, Off-Label Use
- Abstract
This case highlights clinical dilemmas faced by physicians when treating patients with conditions for which there are limited or no FDA-approved treatment options. First, it raises questions about when it is appropriate to prescribe medications for "off-label" indications and what might be the ethical and legal implications of doing so. It also prompts us to consider why pharmaceutical companies might or might not pursue FDA approval for new indications when a drug has already been approved for use in another condition. Finally, this case demonstrates the importance of employing shared decision making when discussing complex clinical decisions and how such techniques might have led to different outcomes and better understanding between Dr. Shannin, Maxine, and Heather., (© 2016 American Medical Association. All Rights Reserved. ISSN 2376-6980.)
- Published
- 2016
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237. Human Monkeypox in the Kivus, a Conflict Region of the Democratic Republic of the Congo.
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McCollum AM, Nakazawa Y, Ndongala GM, Pukuta E, Karhemere S, Lushima RS, Ilunga BK, Kabamba J, Wilkins K, Gao J, Li Y, Emerson G, Damon IK, Carroll DS, Reynolds MG, Malekani J, and Tamfum JJ
- Subjects
- Adult, Child, Democratic Republic of the Congo epidemiology, Female, Humans, Infant, Male, Phylogeny, Warfare, Young Adult, Mpox (monkeypox) epidemiology, Monkeypox virus genetics
- Abstract
Monkeypox (MPX) is a zoonotic Orthopoxvirus infection endemic in central and western Africa. Human MPX cases occur in the central and northern regions of the Democratic Republic of the Congo (DRC), and this is the first report of confirmed MPX cases in the forested areas of North and South Kivu Provinces, with a detailed epidemiological investigation for one case. The location of each case is within areas predicted to be suitable for MPX virus transmission based on an ecological niche model. Phylogenetic analysis places these viruses in the Congo Basin clade., (© The American Society of Tropical Medicine and Hygiene.)
- Published
- 2015
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238. Turbines and Terrestrial Vertebrates: Variation in Tortoise Survivorship Between a Wind Energy Facility and an Adjacent Undisturbed Wildland Area in the Desert Southwest (USA).
- Author
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Agha M, Lovich JE, Ennen JR, Augustine B, Arundel TR, Murphy MO, Meyer-Wilkins K, Bjurlin C, Delaney D, Briggs J, Austin M, Madrak SV, and Price SJ
- Subjects
- Animals, Animals, Wild growth & development, Desert Climate, Environmental Monitoring, Population Dynamics, Renewable Energy, Southwestern United States, Survival Rate, Animals, Wild physiology, Ecosystem, Facility Design and Construction, Turtles physiology, Wind
- Abstract
With the recent increase in utility-scale wind energy development, researchers have become increasingly concerned how this activity will affect wildlife and their habitat. To understand the potential impacts of wind energy facilities (WEF) post-construction (i.e., operation and maintenance) on wildlife, we compared differences in activity centers and survivorship of Agassiz's desert tortoises (Gopherus agassizii) inside or near a WEF to neighboring tortoises living near a wilderness area (NWA) and farther from the WEF. We found that the size of tortoise activity centers varied, but not significantly so, between the WEF (6.25 ± 2.13 ha) and adjacent NWA (4.13 ± 1.23 ha). However, apparent survival did differ significantly between the habitat types: over the 18-year study period apparent annual survival estimates were 0.96 ± 0.01 for WEF tortoises and 0.92 ± 0.02 for tortoises in the NWA. High annual survival suggests that operation and maintenance of the WEF has not caused considerable declines in the adult population over the past two decades. Low traffic volume, enhanced resource availability, and decreased predator populations may influence annual survivorship at this WEF. Further research on these proximate mechanisms and population recruitment would be useful for mitigating and managing post-development impacts of utility-scale wind energy on long-lived terrestrial vertebrates.
- Published
- 2015
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239. Correction for Kondas et al., Variola Virus-Specific Diagnostic Assays: Characterization, Sensitivity, and Specificity.
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Kondas AV, Olson VA, Li Y, Abel J, Laker M, Rose L, Wilkins K, Turner J, Kline R, and Damon IK
- Published
- 2015
- Full Text
- View/download PDF
240. Automated analysis of vital signs to identify patients with substantial bleeding before hospital arrival: a feasibility study.
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Liu J, Khitrov MY, Gates JD, Odom SR, Havens JM, de Moya MA, Wilkins K, Wedel SK, Kittell EO, Reifman J, and Reisner AT
- Subjects
- Adolescent, Adult, Aged, Air Ambulances, Blood Pressure physiology, Emergency Medical Services methods, Feasibility Studies, Female, Humans, Injury Severity Score, Male, Middle Aged, Multivariate Analysis, Prospective Studies, Retrospective Studies, Shock diagnosis, Time Factors, Trauma Centers, Young Adult, Automation, Hemorrhage diagnosis, Triage methods, Vital Signs
- Abstract
Trauma outcomes are improved by protocols for substantial bleeding, typically activated after physician evaluation at a hospital. Previous analysis suggested that prehospital vital signs contained patterns indicating the presence or absence of substantial bleeding. In an observational study of adults (aged ≥18 years) transported to level I trauma centers by helicopter, we investigated the diagnostic performance of the Automated Processing of the Physiological Registry for Assessment of Injury Severity (APPRAISE) system, a computational platform for real-time analysis of vital signs, for identification of substantial bleeding in trauma patients with explicitly hemorrhagic injuries. We studied 209 subjects prospectively and 646 retrospectively. In our multivariate analysis, prospective performance was not significantly different from retrospective. The APPRAISE system was 76% sensitive for 24-h packed red blood cells of 9 or more units (95% confidence interval, 59% - 89%) and significantly more sensitive (P < 0.05) than any prehospital Shock Index of 1.4 or higher; sensitivity, 59%; initial systolic blood pressure (SBP) less than 110 mmHg, 50%; and any prehospital SBP less than 90 mmHg, 50%. The APPRAISE specificity for 24-h packed red blood cells of 0 units was 87% (88% for any Shock Index ≥1.4, 88% for initial SBP <110 mmHg, and 90% for any prehospital SBP <90 mmHg). Median APPRAISE hemorrhage notification time was 20 min before arrival at the trauma center. In conclusion, APPRAISE identified bleeding before trauma center arrival. En route, this capability could allow medics to focus on direct patient care rather than the monitor and, via advance radio notification, could expedite hospital interventions for patients with substantial blood loss.
- Published
- 2015
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241. Laboratory-acquired vaccinia virus infection in a recently immunized person--Massachusetts, 2013.
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Hsu CH, Farland J, Winters T, Gunn J, Caron D, Evans J, Osadebe L, Bethune L, McCollum AM, Patel N, Wilkins K, Davidson W, Petersen B, and Barry MA
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- Adult, Animals, Cefazolin administration & dosage, Cellulitis diagnosis, Cellulitis drug therapy, Cellulitis etiology, Humans, Infusions, Intravenous, Laboratory Personnel, Male, Massachusetts, Mice, Orthopoxvirus isolation & purification, Poxviridae Infections diagnosis, Poxviridae Infections virology, Smallpox Vaccine immunology, Needlestick Injuries complications, Occupational Injuries diagnosis, Occupational Injuries virology, Vaccinia diagnosis, Vaccinia virology, Vaccinia virus isolation & purification
- Abstract
On November 26, 2013, the CDC poxvirus laboratory was notified by the Boston Public Health Commission (BPHC) of an inadvertent inoculation of a recently vaccinated (ACAM2000 smallpox vaccine) laboratory worker with wild type vaccinia virus (VACV) Western Reserve. A joint investigation by CDC and BPHC confirmed orthopoxvirus infection in the worker, who had reported a needle stick in his thumb while inoculating a mouse with VACV. He experienced a non-tender, red rash on his arm, diagnosed at a local emergency department as cellulitis. He subsequently developed a necrotic lesion on his thumb, diagnosed as VACV infection. Three weeks after the injury, the thumb lesion was surgically debrided and at 2 months post-injury, the skin lesion had resolved. The investigation confirmed that the infection was the first reported VACV infection in the United States in a laboratory worker vaccinated according to the Advisory Committee on Immunization Practices (ACIP) recommendations. The incident prompted the academic institution to outline biosafety measures for working with biologic agents, such as biosafety training of laboratory personnel, vaccination (if appropriate), and steps in incident reporting. Though vaccination has been shown to be an effective measure in protecting personnel in the laboratory setting, this case report underscores the importance of proper safety measures and incident reporting.
- Published
- 2015
242. Variola virus-specific diagnostic assays: characterization, sensitivity, and specificity.
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Kondas AV, Olson VA, Li Y, Abel J, Laker M, Rose L, Wilkins K, Turner J, Kline R, and Damon IK
- Subjects
- Base Sequence, DNA, Viral genetics, Molecular Sequence Data, Sensitivity and Specificity, Species Specificity, Real-Time Polymerase Chain Reaction methods, Variola virus isolation & purification
- Abstract
A public health response relies upon rapid and reliable confirmation of disease by diagnostic assays. Here, we detail the design and validation of two variola virus-specific real-time PCR assays, since previous assays cross-reacted with newly identified cowpox viruses. The assay specificity must continually be reassessed as other closely related viruses are identified., (Copyright © 2015, American Society for Microbiology. All Rights Reserved.)
- Published
- 2015
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243. Novel poxvirus infection in 2 patients from the United States.
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Osadebe LU, Manthiram K, McCollum AM, Li Y, Emerson GL, Gallardo-Romero NF, Doty JB, Wilkins K, Zhao H, Drew CP, Metcalfe MG, Goldsmith CS, Muehlenbachs A, Googe PB, Dunn J, Duenckel T, Henderson H, Carroll DS, Zaki SR, Denison MR, Reynolds MG, and Damon IK
- Subjects
- Biopsy, DNA, Viral genetics, Humans, Molecular Sequence Data, Polymerase Chain Reaction, Poxviridae genetics, Poxviridae Infections pathology, Sequence Analysis, DNA, Skin pathology, Skin virology, United States, Poxviridae classification, Poxviridae isolation & purification, Poxviridae Infections diagnosis, Poxviridae Infections virology
- Abstract
Background: Some human poxvirus infections can be acquired through zoonotic transmission. We report a previously unknown poxvirus infection in 2 patients, 1 of whom was immunocompromised; both patients had known equine contact., Methods: The patients were interviewed and clinical information was abstracted from the patients' medical files. Biopsies of the skin lesions were collected from both patients for histopathology, immunohistochemistry, and transmission electron microscopy analysis. Oral and skin swabs were collected from animals with frequent contact with the patients, and environmental sampling including rodent trapping was performed on the farm where the immunosuppressed patient was employed. "Pan-pox and high Guanine-cytosine" polymerase chain reaction assays were performed on patient, animal, and environmental isolates. Amplicon sequences of the viral DNA were used for agent identification and phylogenetic analysis., Results: Specimens from both human cases revealed a novel poxvirus. The agent shares 88% similarity to viruses in the Parapoxvirus genus and 78% to those in the Molluscipoxvirus genus but is sufficiently divergent to resist classification as either. All animal and environmental specimens were negative for poxvirus and both patients had complete resolution of lesions., Conclusions: This report serves as a reminder that poxviruses should be considered in cutaneous human infections, especially in individuals with known barnyard exposures. The clinical course of the patients was similar to that of parapoxvirus infections, and the source of this virus is currently unknown but is presumed to be zoonotic. This report also demonstrates the importance of a comprehensive approach to diagnosis of human infections caused by previously unknown pathogens., (Published by Oxford University Press on behalf of the Infectious Diseases Society of America 2014. This work is written by (a) US Government employee(s) and is in the public domain in the US.)
- Published
- 2015
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244. Highlights from the tenth ISCB Student Council Symposium 2014.
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Rahman F, Wilkins K, Jacobsen A, Junge A, Vicedo E, DeBlasio D, Jigisha A, and Di Domenico T
- Subjects
- Drug Resistance, Multiple, High-Throughput Nucleotide Sequencing, Microsatellite Repeats genetics, Peer Review, Research, Publishing, RNA, Messenger metabolism, Sequence Analysis, DNA, Computational Biology
- Abstract
This report summarizes the scientific content and activities of the annual symposium organized by the Student Council of the International Society for Computational Biology (ISCB), held in conjunction with the Intelligent Systems for Molecular Biology (ISMB) conference in Boston, USA, on July 11th, 2014.
- Published
- 2015
- Full Text
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245. Risk factors associated with invasive fungal infections in combat trauma.
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Rodriguez CJ, Weintrob AC, Shah J, Malone D, Dunne JR, Weisbrod AB, Lloyd BA, Warkentien TE, Murray CK, Wilkins K, Shaikh F, Carson ML, Aggarwal D, and Tribble DR
- Subjects
- Adult, Afghan Campaign 2001-, Amputation, Surgical adverse effects, Case-Control Studies, Humans, Male, Military Medicine, Odds Ratio, Retrospective Studies, Risk Factors, Transfusion Reaction, United States, Wounds and Injuries epidemiology, Young Adult, Military Personnel statistics & numerical data, Mycoses epidemiology, Mycoses pathology, Wounds and Injuries microbiology
- Abstract
Background: In recent years, invasive fungal infections (IFI) have complicated the clinical course of patients with combat-related injuries. Commonalities in injury patterns and characteristics among patients with IFI led to the development of a Joint Trauma System (JTS) clinical practice guideline (CPG) for IFI management. We performed a case-control study to confirm and further delineate risk factors associated with IFI development in combat casualties with the objective of generating data to refine the CPG and promote timelier initiation of treatment., Methods: Data were collected retrospectively for United States (U.S.) military personnel injured during deployment in Afghanistan from June 2009 through August 2011. Cases were identified as IFI based upon wound cultures with fungal growth and/or fungal elements seen on histology, in addition to the presence of recurrent wound necrosis. Controls were matched using date of injury (±3 mo) and injury severity score (±10). Risk factor parameters analyzed included injury circumstances, blood transfusion requirements, amputations after first operative intervention, and associated injuries. Data are expressed as multivariate odds ratios (OR; 95% confidence interval [CI])., Results: Seventy-six IFI cases were identified from 1,133 U.S. military personnel wounded in Afghanistan and matched to 150 controls. Parameters associated significantly with the development of IFI multivariate analysis were blast injuries (OR: 5.7; CI: 1.1-29.6), dismounted at time of injury (OR: 8.5; CI: 1.2-59.8); above the knee amputations (OR: 4.1; CI: 1.3-12.7), and large-volume packed red blood cell (PRBC; >20 U) transfusions within first 24 h (OR: 7.0; CI: 2.5-19.7)., Conclusions: Our analysis indicates that dismounted blast injuries, resulting in above the knee amputations, and requirement of large volume PRBC transfusions are independent predictors of IFI development. These data confirm all the preliminary risk factors, except for genitalia/perineal injuries, utilized by JTS in their IFI CPG. Model validation is necessary for further risk factor specification.
- Published
- 2014
- Full Text
- View/download PDF
246. RNABindRPlus: a predictor that combines machine learning and sequence homology-based methods to improve the reliability of predicted RNA-binding residues in proteins.
- Author
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Walia RR, Xue LC, Wilkins K, El-Manzalawy Y, Dobbs D, and Honavar V
- Subjects
- Animals, Humans, Artificial Intelligence, Models, Theoretical, RNA-Binding Proteins genetics, Sequence Analysis, Protein methods, Sequence Analysis, RNA methods
- Abstract
Protein-RNA interactions are central to essential cellular processes such as protein synthesis and regulation of gene expression and play roles in human infectious and genetic diseases. Reliable identification of protein-RNA interfaces is critical for understanding the structural bases and functional implications of such interactions and for developing effective approaches to rational drug design. Sequence-based computational methods offer a viable, cost-effective way to identify putative RNA-binding residues in RNA-binding proteins. Here we report two novel approaches: (i) HomPRIP, a sequence homology-based method for predicting RNA-binding sites in proteins; (ii) RNABindRPlus, a new method that combines predictions from HomPRIP with those from an optimized Support Vector Machine (SVM) classifier trained on a benchmark dataset of 198 RNA-binding proteins. Although highly reliable, HomPRIP cannot make predictions for the unaligned parts of query proteins and its coverage is limited by the availability of close sequence homologs of the query protein with experimentally determined RNA-binding sites. RNABindRPlus overcomes these limitations. We compared the performance of HomPRIP and RNABindRPlus with that of several state-of-the-art predictors on two test sets, RB44 and RB111. On a subset of proteins for which homologs with experimentally determined interfaces could be reliably identified, HomPRIP outperformed all other methods achieving an MCC of 0.63 on RB44 and 0.83 on RB111. RNABindRPlus was able to predict RNA-binding residues of all proteins in both test sets, achieving an MCC of 0.55 and 0.37, respectively, and outperforming all other methods, including those that make use of structure-derived features of proteins. More importantly, RNABindRPlus outperforms all other methods for any choice of tradeoff between precision and recall. An important advantage of both HomPRIP and RNABindRPlus is that they rely on readily available sequence and sequence-derived features of RNA-binding proteins. A webserver implementation of both methods is freely available at http://einstein.cs.iastate.edu/RNABindRPlus/.
- Published
- 2014
- Full Text
- View/download PDF
247. Poxvirus viability and signatures in historical relics.
- Author
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McCollum AM, Li Y, Wilkins K, Karem KL, Davidson WB, Paddock CD, Reynolds MG, and Damon IK
- Subjects
- Autopsy, Cadaver, History, 18th Century, History, 19th Century, History, 20th Century, History, Ancient, Humans, Smallpox history, Smallpox transmission, Smallpox Vaccine immunology, Specimen Handling methods, Vaccination, Vaccinia virus immunology, Variola virus isolation & purification, Variola virus pathogenicity, DNA, Viral isolation & purification, Microbial Viability, Smallpox prevention & control, Smallpox virology, Variola virus physiology
- Abstract
Although it has been >30 years since the eradication of smallpox, the unearthing of well-preserved tissue material in which the virus may reside has called into question the viability of variola virus decades or centuries after its original occurrence. Experimental data to address the long-term stability and viability of the virus are limited. There are several instances of well-preserved corpses and tissues that have been examined for poxvirus viability and viral DNA. These historical specimens cause concern for potential exposures, and each situation should be approached cautiously and independently with the available information. Nevertheless, these specimens provide information on the history of a major disease and vaccination against it.
- Published
- 2014
- Full Text
- View/download PDF
248. Conscious thoughts from reflex-like processes: a new experimental paradigm for consciousness research.
- Author
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Allen AK, Wilkins K, Gazzaley A, and Morsella E
- Subjects
- Humans, Inhibition, Psychological, Reflex, Thinking physiology, Cognition physiology, Consciousness physiology, Imagination physiology, Unconscious, Psychology
- Abstract
The contents of our conscious mind can seem unpredictable, whimsical, and free from external control. When instructed to attend to a stimulus in a work setting, for example, one might find oneself thinking about household chores. Conscious content thus appears different in nature from reflex action. Under the appropriate conditions, reflexes occur predictably, reliably, and via external control. Despite these intuitions, theorists have proposed that, under certain conditions, conscious content resembles reflexes and arises reliably via external control. We introduce the Reflexive Imagery Task, a paradigm in which, as a function of external control, conscious content is triggered reliably and unintentionally: When instructed to not subvocalize the name of a stimulus object, participants reliably failed to suppress the set-related imagery. This stimulus-elicited content is considered 'high-level' content and, in terms of stages of processing, occurs late in the processing stream. We discuss the implications of this paradigm for consciousness research., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
249. Specific qPCR assays for the detection of orf virus, pseudocowpox virus and bovine papular stomatitis virus.
- Author
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Zhao H, Wilkins K, Damon IK, and Li Y
- Subjects
- Animals, Cattle, Cattle Diseases diagnosis, Cattle Diseases virology, Humans, Occupational Diseases diagnosis, Occupational Diseases virology, Orf virus genetics, Parapoxvirus genetics, Poxviridae Infections virology, Pseudocowpox Virus genetics, Veterinary Medicine methods, Virology methods, Molecular Diagnostic Techniques methods, Orf virus isolation & purification, Parapoxvirus isolation & purification, Poxviridae Infections diagnosis, Poxviridae Infections veterinary, Pseudocowpox Virus isolation & purification, Real-Time Polymerase Chain Reaction methods
- Abstract
The genus Parapoxvirus (PAPV) is comprised traditionally of orf virus (ORFV), pseudocowpox virus (PCPV) and bovine papular stomatitis virus (BPSV), which cause infections of ruminants and their handlers in the U.S. and worldwide. Unlike orthopoxvirus infections, which can cause systemic or localized infections, PAPV infections present normally as benign, self-limited and localized skin lesions; infections do not confer lifelong immunity. In recent years, related potentially to enhanced awareness and the availability of diagnostic methods, there has been an observed increase in reported cases of PAPV in animals and humans. This study describes TaqMan based real-time PCR assays for both generic and specific detection of PAPV species for surveillance and outbreak investigations. These assays target highly conserved PAPV RNA polymerase gene sequences and are capable of detecting three known species of PAPVs (ORFV, PCPV, and BPSV). The assays were evaluated using a panel of PAPV DNA derived from human infections or animal specimen remainders. The sensitivities of all four assays were determined using droplet digital PCR; fewer than 10 copies of clinical PAPV DNA can be detected consistently. These assays provide a reliable and sensitive method for rapid confirmation and characterization PAPV infections with varying clinical presentations., (Published by Elsevier B.V.)
- Published
- 2013
- Full Text
- View/download PDF
250. Development and validation of a portable platform for deploying decision-support algorithms in prehospital settings.
- Author
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Reisner AT, Khitrov MY, Chen L, Blood A, Wilkins K, Doyle W, Wilcox S, Denison T, and Reifman J
- Subjects
- Hospitals, Humans, Software, Vital Signs, Algorithms, Decision Support Systems, Clinical
- Abstract
Background: Advanced decision-support capabilities for prehospital trauma care may prove effective at improving patient care. Such functionality would be possible if an analysis platform were connected to a transport vital-signs monitor. In practice, there are technical challenges to implementing such a system. Not only must each individual component be reliable, but, in addition, the connectivity between components must be reliable., Objective: We describe the development, validation, and deployment of the Automated Processing of Physiologic Registry for Assessment of Injury Severity (APPRAISE) platform, intended to serve as a test bed to help evaluate the performance of decision-support algorithms in a prehospital environment., Methods: We describe the hardware selected and the software implemented, and the procedures used for laboratory and field testing., Results: The APPRAISE platform met performance goals in both laboratory testing (using a vital-sign data simulator) and initial field testing. After its field testing, the platform has been in use on Boston MedFlight air ambulances since February of 2010., Conclusion: These experiences may prove informative to other technology developers and to healthcare stakeholders seeking to invest in connected electronic systems for prehospital as well as in-hospital use. Our experiences illustrate two sets of important questions: are the individual components reliable (e.g., physical integrity, power, core functionality, and end-user interaction) and is the connectivity between components reliable (e.g., communication protocols and the metadata necessary for data interpretation)? While all potential operational issues cannot be fully anticipated and eliminated during development, thoughtful design and phased testing steps can reduce, if not eliminate, technical surprises.
- Published
- 2013
- Full Text
- View/download PDF
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