46 results on '"Luong ML"'
Search Results
2. Interventions to Mitigate Bias in Social Work Decision-Making: A Systematic Review
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Featherston, R, Shlonsky, A, Lewis, C, Luong, ML, Downie, L, Vogel, A, Granger, C, Hamilton, B, Galvin, K, Featherston, R, Shlonsky, A, Lewis, C, Luong, ML, Downie, L, Vogel, A, Granger, C, Hamilton, B, and Galvin, K
- Abstract
Purpose: This systematic review synthesized evidence supporting interventions aimed at mitigating cognitive bias associated with the decision-making of social work professionals. Methods: A systematic search was conducted within 10 social services and health-care databases. Review authors independently screened studies in duplicate against prespecified inclusion criteria, and two review authors undertook data extraction and quality assessment. Results: Four relevant studies were identified. Because these studies were too heterogeneous to conduct meta-analyses, results are reported narratively. Three studies focused on diagnostic decisions within mental health and one considered family reunification decisions. Two strategies were reportedly effective in mitigating error: a nomogram tool and a specially designed online training course. One study assessing a consider-the-opposite approach reported no effect on decision outcomes. Conclusions: Cognitive bias can impact the accuracy of clinical reasoning. This review highlights the need for research into cognitive bias mitigation within the context of social work practice decision-making.
- Published
- 2019
3. Invasive aspergillosis in liver transplant recipients in the current era.
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Kimura M, Rinaldi M, Kothari S, Giannella M, Anjan S, Natori Y, Phoompoung P, Gault E, Hand J, D'Asaro M, Neofytos D, Mueller NJ, Kremer AE, Rojko T, Ribnikar M, Silveira FP, Kohl J, Cano A, Torre-Cisneros J, San-Juan R, Aguado JM, Mansoor AE, George IA, Mularoni A, Russelli G, Luong ML, AlJishi YA, AlJishi MN, Hamandi B, Selzner N, and Husain S
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- Humans, Male, Female, Middle Aged, Case-Control Studies, Risk Factors, Prognosis, Follow-Up Studies, Postoperative Complications, Transplant Recipients statistics & numerical data, Survival Rate, Retrospective Studies, Graft Rejection etiology, Adult, Aged, Aspergillus isolation & purification, Liver Transplantation adverse effects, Aspergillosis etiology, Aspergillosis epidemiology, Aspergillosis mortality
- Abstract
Invasive aspergillosis (IA) is a rare but fatal disease among liver transplant recipients (LiTRs). We performed a multicenter 1:2 case-control study comparing LiTRs diagnosed with proven/probable IA and controls with no invasive fungal infection. We included 62 IA cases and 124 matched controls. Disseminated infection occurred only in 8 cases (13%). Twelve-week all-cause mortality of IA was 37%. In multivariate analyses, systemic antibiotic usage (adjusted odds ratio [aOR], 4.74; P = .03) and history of pneumonia (aOR, 48.7; P = .01) were identified as independent risk factors associated with the occurrence of IA. Moreover, reoperation (aOR, 5.99; P = .01), systemic antibiotic usage (aOR, 5.03; P = .04), and antimold prophylaxis (aOR, 11.9; P = .02) were identified as independent risk factors associated with the occurrence of early IA. Among IA cases, Aspergillus colonization (adjusted hazard ratio [aHR], 86.9; P < .001), intensive care unit stay (aHR, 3.67; P = .02), disseminated IA (aHR, 8.98; P < .001), and dialysis (aHR, 2.93; P = .001) were identified as independent risk factors associated with 12-week all-cause mortality, while recent receipt of tacrolimus (aHR, 0.11; P = .001) was protective. Mortality among LiTRs with IA remains high in the current era. The identified risk factors and protective factors may be useful for establishing robust targeted antimold prophylactic and appropriate treatment strategies against IA., Competing Interests: Declaration of competing interest The authors of this manuscript have conflicts of interest to disclose as described by the American Journal of Transplantation. J. Hand reports research grant funding from Pfizer, Janssen, Scynexis, and GlaxoSmithKline. D. Neofytos has received research support from MSD and Pfizer and consulting fees from MSD, Pfizer, Basilea, and Gilead. N.J. Mueller is on the scientific advisory board of Takeda MSD, and Pfizer and has received travel support from Biotest. M. Luong is on the Scientific Advisory Board of Takeda and Merck. S. Husain reports grant funding from Merck, Astellas, ScynexisInc, Pulmocide, Ltd, and Gilead Sciences Inc, outside the submitted work. All other authors have no potential conflicts., (Copyright © 2024. Published by Elsevier Inc.)
- Published
- 2024
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4. International Society for Heart and Lung Transplantation Guidelines for the Evaluation and Care of Cardiac Transplant Candidates-2024.
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Peled Y, Ducharme A, Kittleson M, Bansal N, Stehlik J, Amdani S, Saeed D, Cheng R, Clarke B, Dobbels F, Farr M, Lindenfeld J, Nikolaidis L, Patel J, Acharya D, Albert D, Aslam S, Bertolotti A, Chan M, Chih S, Colvin M, Crespo-Leiro M, D'Alessandro D, Daly K, Diez-Lopez C, Dipchand A, Ensminger S, Everitt M, Fardman A, Farrero M, Feldman D, Gjelaj C, Goodwin M, Harrison K, Hsich E, Joyce E, Kato T, Kim D, Luong ML, Lyster H, Masetti M, Matos LN, Nilsson J, Noly PE, Rao V, Rolid K, Schlendorf K, Schweiger M, Spinner J, Townsend M, Tremblay-Gravel M, Urschel S, Vachiery JL, Velleca A, Waldman G, and Walsh J
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- Humans, Societies, Medical, Heart-Lung Transplantation standards, Waiting Lists, Practice Guidelines as Topic, Patient Selection, Heart Transplantation standards
- Abstract
The "International Society for Heart and Lung Transplantation Guidelines for the Evaluation and Care of Cardiac Transplant Candidates-2024" updates and replaces the "Listing Criteria for Heart Transplantation: International Society for Heart and Lung Transplantation Guidelines for the Care of Cardiac Transplant Candidates-2006" and the "2016 International Society for Heart Lung Transplantation Listing Criteria for Heart Transplantation: A 10-year Update." The document aims to provide tools to help integrate the numerous variables involved in evaluating patients for transplantation, emphasizing updating the collaborative treatment while waiting for a transplant. There have been significant practice-changing developments in the care of heart transplant recipients since the publication of the International Society for Heart and Lung Transplantation (ISHLT) guidelines in 2006 and the 10-year update in 2016. The changes pertain to 3 aspects of heart transplantation: (1) patient selection criteria, (2) care of selected patient populations, and (3) durable mechanical support. To address these issues, 3 task forces were assembled. Each task force was cochaired by a pediatric heart transplant physician with the specific mandate to highlight issues unique to the pediatric heart transplant population and ensure their adequate representation. This guideline was harmonized with other ISHLT guidelines published through November 2023. The 2024 ISHLT guidelines for the evaluation and care of cardiac transplant candidates provide recommendations based on contemporary scientific evidence and patient management flow diagrams. The American College of Cardiology and American Heart Association modular knowledge chunk format has been implemented, allowing guideline information to be grouped into discrete packages (or modules) of information on a disease-specific topic or management issue. Aiming to improve the quality of care for heart transplant candidates, the recommendations present an evidence-based approach., (Copyright © 2024 International Society for the Heart and Lung Transplantation. Published by Elsevier Inc. All rights reserved.)
- Published
- 2024
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5. Management of infectious disease syndromes in thoracic organ transplants and mechanical circulatory device recipients: a Delphi panel.
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Luong ML, Nakamachi Y, Silveira FP, Morrissey CO, Danziger-Isakov L, Verschuuren EAM, Wolfe CR, Hadjiliadis D, Chambers DC, Patel JK, Dellgren G, So M, Verleden GM, Blumberg EA, Vos R, Perch M, Holm AM, Mueller NJ, Chaparro C, and Husain S
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- Humans, Surveys and Questionnaires, Heart-Assist Devices adverse effects, Consensus, Invasive Pulmonary Aspergillosis drug therapy, Mycobacterium Infections, Nontuberculous, Transplant Recipients, Lung Transplantation adverse effects, Anti-Bacterial Agents therapeutic use, Communicable Diseases, Delphi Technique
- Abstract
Purpose: Antimicrobial misuse contributes to antimicrobial resistance in thoracic transplant (TTx) and mechanical circulatory support (MCS) recipients. This study uses a modified Delphi method to define the expected appropriate antimicrobial prescribing for the common clinical scenarios encountered in TTx and MCS recipients., Methods: An online questionnaire on managing 10 common infectious disease syndromes was submitted to a multidisciplinary Delphi panel of 25 experts from various disciplines. Consensus was predefined as 80% agreement for each question. Questions where consensus was not achieved were discussed during live virtual live sessions adapted by an independent process expert., Results: An online survey of 62 questions related to 10 infectious disease syndromes was submitted to the Delphi panel. In the first round of the online questionnaire, consensus on antimicrobial management was reached by 6.5% (4/62). In Round 2 online live discussion, the remaining 58 questions were discussed among the Delphi Panel members using a virtual meeting platform. Consensus was reached among 62% (36/58) of questions. Agreement was not reached regarding the antimicrobial management of the following six clinical syndromes: (1) Burkholderia cepacia pneumonia (duration of therapy); (2) Mycobacterium abscessus (intra-operative antimicrobials); (3) invasive aspergillosis (treatment of culture-negative but positive BAL galactomannan) (duration of therapy); (4) respiratory syncytial virus (duration of antiviral therapy); (5) left ventricular assist device deep infection (initial empirical antimicrobial coverage) and (6) CMV (duration of secondary prophylaxis)., Conclusion: This Delphi panel developed consensus-based recommendations for 10 infectious clinical syndromes seen in TTx and MCS recipients., (© 2024 Wiley Periodicals LLC.)
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- 2024
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6. Impact of Language Barriers on Outcomes and Experience of COVID-19 Patients Hospitalized in Quebec, Canada, During the First Wave of the Pandemic.
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Dagher O, Passos-Castilho AM, Sareen V, Labbé AC, Barkati S, Luong ML, Rousseau C, Benedetti A, Azoulay L, and Greenaway C
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- Adult, Humans, Quebec epidemiology, SARS-CoV-2, Hospital Mortality, Pandemics, Canada, Hospitalization, Communication Barriers, COVID-19
- Abstract
Language barriers (LB) contribute to coronavirus disease 2019 (COVID-19) health inequities. People with LB were more likely to be SARS-CoV-2 positive despite lower testing and had higher rates of hospitalization. Data on hospital outcomes among immigrants with LB, however, are limited. We aimed to investigate the clinical outcomes of hospitalized COVID-19 cases by LB, immigration status, ethnicity, and access to COVID-19 health information and services prior to admission. Adults with laboratory-confirmed community-acquired COVID-19 hospitalized from March 1 to June 30, 2020, at four tertiary-care hospitals in Montréal, Quebec, Canada were included. Demographics, comorbidities, immigration status, country of birth, ethnicity, presence of LB, and hospital outcomes (ICU admission and death) were obtained through a chart review. Additional socio-economic and access to care questions were obtained through a phone survey. A Fine-Gray competing risk subdistribution hazards model was used to estimate the risk of ICU admission and in-hospital death by immigrant status, region of birth and LB Among 1093 patients, 622 (56.9%) were immigrants and 101 (16.2%) of them had a LB. One third (36%) of immigrants with LB did not have access to an interpreter during hospitalization. Admission to ICU and in-hospital mortality were not significantly different between groups. Prior to admission, one third (14/41) of immigrants with LB had difficulties accessing COVID-19 information in their mother tongue and one third (9/27) of non-white immigrants with a LB had difficulties accessing COVID-19 services. Immigrants with LB were inequitably affected by the first wave of the pandemic in Quebec, Canada. In our study, a large proportion had difficulties accessing information and services related to COVID-19 prior to admission, which may have increased SARS-CoV-2 exposure and hospitalizations. After hospitalization, a large proportion did not have access to interpreters. Providing medical information and care in the language of preference of increasing diverse populations in Canada is important for promoting health equity., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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7. Update on therapeutic approaches for invasive fungal infections in adults.
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Boutin CA and Luong ML
- Abstract
Invasive fungal infections are increasingly encountered with the expansion of iatrogenic immunosuppression, including not only solid organ and hematopoietic stem cell transplant recipients but also patients with malignancies or autoimmune diseases receiving immunomodulatory therapies, such as Bruton Tyrosine Kinase (BTK) inhibitor. Their attributable mortality remains elevated, part of which is a contribution from globally emerging resistance in both molds and yeasts. Because antifungal susceptibility test results are often unavailable or delayed, empiric and tailored antifungal approaches including choice of agent(s) and use of combination therapy are heterogeneous and often based on clinician experience with knowledge of host's net state of immunosuppression, prior antifungal exposure, antifungal side effects and interaction profile, clinical severity of disease including site(s) of infection and local resistance data. In this review, we aim to summarize previous recommendations and most recent literature on treatment of invasive mold and yeast infections in adults to guide optimal evidence-based therapeutic approaches. We review the recent data that support use of available antifungal agents, including the different triazoles that have now been studied in comparison to previously preferred agents. We discuss management of complex infections with specific emerging fungi such as Scedosporium spp., Fusarium spp., Trichosporon asahii , and Candida auris . We briefly explore newer antifungal agents or formulations that are now being investigated to overcome therapeutic pitfalls, including but not limited to olorofim, rezafungin, fosmanogepix, and encochleated Amphotericin B. We discuss the role of surgical resection or debridement, duration of treatment, follow-up modalities, and need for secondary prophylaxis, all of which remain challenging, especially in patients chronically immunocompromised or awaiting more immunosuppressive therapies., Competing Interests: The authors declare that there is no conflict of interest., (© The Author(s), 2024.)
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- 2024
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8. Real-World Effectiveness of Nirmatrelvir/Ritonavir on Coronavirus Disease 2019-Associated Hospitalization Prevention: A Population-based Cohort Study in the Province of Quebec, Canada.
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Kaboré JL, Laffont B, Diop M, Tardif MR, Turgeon AF, Dumaresq J, Luong ML, Cauchon M, Chapdelaine H, Claveau D, Brosseau M, Haddad E, and Benigeri M
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- Humans, Quebec epidemiology, Cohort Studies, Retrospective Studies, SARS-CoV-2, COVID-19 Drug Treatment, Hospitalization, Antiviral Agents therapeutic use, Ritonavir therapeutic use, COVID-19 prevention & control
- Abstract
Background: Nirmatrelvir/ritonavir has shown to reduce COVID-19 hospitalization and death before Omicron, but updated real-world evidence studies are needed. This study aimed to assess whether nirmatrelvir/ritonavir reduces the risk of COVID-19-associated hospitalization among high-risk outpatients., Methods: A retrospective cohort study of outpatients with SARS-CoV-2 between March 15 and 15 October 2022, using data from the Quebec clinico-administrative databases. Outpatients treated with nirmatrelvir/ritonavir were compared with infected ones not receiving nirmatrelvir/ritonavir using propensity-score matching. Relative risk (RR) of COVID-19-associated hospitalization within 30 days was assessed using a Poisson regression., Results: A total of 8402 treated outpatients were matched to controls. Regardless of vaccination status, nirmatrelvir/ritonavir treatment was associated with a 69% reduced RR of hospitalization (RR: .31; 95% CI: .28; .36; number needed to treat [NNT] = 13). The effect was more pronounced in outpatients with incomplete primary vaccination (RR: .04; 95% CI: .03; .06; NNT = 8), while no benefit was found in those with a complete primary vaccination (RR: .93; 95% CI: .78; 1.08). Subgroups analysis among high-risk outpatients with a complete primary vaccination showed that nirmatrelvir/ritonavir treatment was associated with a significant decrease in the RR of hospitalization in severely immunocompromised outpatients (RR: .66; 95% CI: .50; .89; NNT = 16) and in high-risk outpatients aged ≥70 years (RR: .50; 95% CI: .34; .74; NNT = 10) when the last dose of the vaccine was received at least 6 months ago., Conclusions: Nirmatrelvir/ritonavir reduces the risk of COVID-19-associated hospitalization among incompletely vaccinated high-risk outpatients and among some subgroups of completely vaccinated high-risk outpatients., Competing Interests: Potential conflicts of interest. M. R. T. reports an issued or pending patent (US 11,359,010 B2) for humanized anti-S100A9 antibody and uses thereof (no royalties to date). A. F. T. is the chairholder of the Canada Research Chair in Critical Care Neurology and Trauma. M.-L. L. reports consulting fees from Takeda and Merck. H. C. reports grants or contracts from Novartis, Roche, Sanofi, and Merck for participation in COVID-19–related trials (paid to their institution) and unpaid participation on the medical board of an immunodeficient patient advocacy group (Quebec and Canada). M. Brosseau reports a grant from AstraZeneca as the local principal investigator for the Efficacy and Safety of Tozorakimab in Patients Hospitalised for Viral Lung Infection Requiring Supplemental Oxygen (TILIA) study (paid to their institution). E. H. reports an ongoing patent from Immune BioSolutions for an anti–SARS-CoV-2 monoclonal antibody, and an unpaid position as President Elect of the Clinical Immunology Society. All other authors report no potential conflicts. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed., (© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2023
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9. Post-transplant outcomes among cystic fibrosis patients undergoing lung transplantation colonized by Burkholderia: A single center cohort study.
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Gauvreau A, Carrier FM, Poirier C, Morisset J, Lands LC, Lavoie A, Nasir B, Ferraro P, and Luong ML
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- Humans, Adult, Cohort Studies, Retrospective Studies, Cystic Fibrosis complications, Cystic Fibrosis surgery, Burkholderia, Lung Transplantation adverse effects, Burkholderia cepacia complex, Burkholderia Infections complications
- Abstract
Background: Prior infection with Burkholderia cepacia complex (BCC) has been associated with poorer outcomes after lung transplantation, posing an important dilemma for cystic fibrosis (CF). Although current guidelines consider BCC infection to be a relative contraindication, some centers continue to offer lung transplantation to BCC-infected CF patients., Methods: We conducted a retrospective cohort study which included all consecutive CF-LTR between 2000 and 2019 to compare the postoperative survival of BCC-infected CF lung transplant recipients (CF-LTR) to BCC-uninfected patients. We used a Kaplan-Meier analysis to compare survival of BCC-infected to BCC-uninfected CF-LTR and fitted a multivariable Cox model, adjusted for age, sex, BMI and year of transplantation as potential confounders. As an exploratory analysis, Kaplan-Meier curves were also stratified by the presence of BCC and urgency of transplantation., Results: A total of 205 patients were included with a mean age of 30.5 years. Seventeen patients (8%) were infected with BCC prior to LT. Patients were infected with the following species: B. multivorans
5 , B. vietnamiensis3 , combined B. multivorans and B. vietnamiensis3 and others4 . None of the patients were infected with B. cenocepacia. Three patients were infected with B. gladioli. One-year survival was 91.7% (188/205) for the entire cohort, 82.4% (14/17) among BCC-infected CF-LTR, and 92.5% (173/188) among BCC uninfected CF-LTR (crude HR = 2.19; 95%CI 0.99-4.85; p = 0.05). In the multivariable model, presence of BCC was not significantly associated with worse survival (adjusted HR 1.89; 95%CI 0.85-4.24; p = 0.12). In the stratified analysis for both presence of BCC and urgency of transplantation, urgency of transplantation among BCC-infected CF-LTR appeared to be associated with poorer outcome (p = 0.003 across the 4 subgroups)., Conclusion: Our results suggest that non-cenocepacia BCC-infected CF-LTR have comparable survival rate to BCC-uninfected CF-LTR., Competing Interests: Disclosure statement The authors have no conflicts of interest to disclose. This study was financially supported by the Fondation du CHUM. Dr Carrier is a recipient of a career research award from the Fonds de recherche du Québec–Santé. The authors thank the statistical department of the University of Montreal for their assistance and helpful feedback., (Copyright © 2023 International Society for Heart and Lung Transplantation. Published by Elsevier Inc. All rights reserved.)- Published
- 2023
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10. A consensus conference to define the utility of advanced infectious disease diagnostics in solid organ transplant recipients.
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Azar MM, Turbett S, Gaston D, Gitman M, Razonable R, Koo S, Hanson K, Kotton C, Silveira F, Banach DB, Basu SS, Bhaskaran A, Danziger-Isakov L, Bard JD, Gandhi R, Hanisch B, John TM, Odom John AR, Letourneau AR, Luong ML, Maron G, Miller S, Prinzi A, Schwartz I, Simner P, and Kumar D
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- Humans, Transplant Recipients, Consensus, North America, Transplants, Organ Transplantation adverse effects
- Abstract
The last decade has seen an explosion of advanced assays for the diagnosis of infectious diseases, yet evidence-based recommendations to inform their optimal use in the care of transplant recipients are lacking. A consensus conference sponsored by the American Society of Transplantation (AST) was convened on December 7, 2021, to define the utility of novel infectious disease diagnostics in organ transplant recipients. The conference represented a collaborative effort by experts in transplant infectious diseases, diagnostic stewardship, and clinical microbiology from centers across North America to evaluate current uses, unmet needs, and future directions for assays in 5 categories including (1) multiplex molecular assays, (2) rapid antimicrobial resistance detection methods, (3) pathogen-specific T-cell reactivity assays, (4) next-generation sequencing assays, and (5) mass spectrometry-based assays. Participants reviewed and appraised available literature, determined assay advantages and limitations, developed best practice guidance largely based on expert opinion for clinical use, and identified areas of future investigation in the setting of transplantation. In addition, attendees emphasized the need for well-designed studies to generate high-quality evidence needed to guide care, identified regulatory and financial barriers, and discussed the role of regulatory agencies in facilitating research and implementation of these assays. Findings and consensus statements are presented., (© 2022 The American Society of Transplantation and the American Society of Transplant Surgeons.)
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- 2022
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11. Fungal infection and chronic lung allograft dysfunction: A dangerous combination.
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Boutin CA, Desjardins M, and Luong ML
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- Humans, Lung, Transplantation, Homologous, Allografts, Graft Rejection, Mycoses, Lung Transplantation adverse effects
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- 2022
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12. Outcomes of hospitalized COVID-19 patients in Canada: impact of ethnicity, migration status and country of birth.
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Passos-Castilho AM, Labbé AC, Barkati S, Luong ML, Dagher O, Maynard N, Tutt-Guérette MA, Kierans J, Rousseau C, Benedetti A, Azoulay L, and Greenaway C
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- Adult, Canada epidemiology, Ethnicity, Female, Hospitalization, Humans, Male, Middle Aged, SARS-CoV-2, COVID-19
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Background: Ethnoracial groups in high-income countries have a 2-fold higher risk of SARS-CoV-2 infection, associated hospitalizations, and mortality than Whites. Migrants are an ethnoracial subset that may have worse COVID-19 outcomes due to additional barriers accessing care, but there are limited data on in-hospital outcomes. We aimed to disaggregate and compare COVID-19 associated hospital outcomes by ethnicity, immigrant status and region of birth., Methods: Adults with community-acquired SARS-CoV-2 infection, hospitalized March 1-June 30, 2020, at four hospitals in Montréal, Quebec, Canada, were included. Age, sex, socioeconomic status, comorbidities, migration status, region of birth, self-identified ethnicity [White, Black, Asian, Latino, Middle East/North African], intensive care unit (ICU) admissions and mortality were collected. Adjusted hazard ratios (aHR) for ICU admission and mortality by immigrant status, ethnicity and region of birth adjusted for age, sex, socioeconomic status and comorbidities were estimated using Fine and Gray competing risk models., Results: Of 1104 patients (median [IQR] age, 63.0 [51.0-76.0] years; 56% males), 57% were immigrants and 54% were White. Immigrants were slightly younger (62 vs 65 years; p = 0.050), had fewer comorbidities (1.0 vs 1.2; p < 0.001), similar crude ICU admissions rates (33.0% vs 28.2%) and lower mortality (13.3% vs 17.6%; p < 0.001) than Canadian-born. In adjusted models, Blacks (aHR 1.39, 95% confidence interval 1.05-1.83) and Asians (1.64, 1.15-2.34) were at higher risk of ICU admission than Whites, but there was significant heterogeneity within ethnic groups. Asians from Eastern Asia/Pacific (2.15, 1.42-3.24) but not Southern Asia (0.97, 0.49-1.93) and Caribbean Blacks (1.39, 1.02-1.89) but not SSA Blacks (1.37, 0.86-2.18) had a higher risk of ICU admission. Blacks had a higher risk of mortality (aHR 1.56, p = 0.049)., Conclusions: Data disaggregated by region of birth identified subgroups of immigrants at increased risk of COVID-19 ICU admission, providing more actionable data for health policymakers to address health inequities., (© The Author(s) 2022. Published by Oxford University Press on behalf of International Society of Travel Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2022
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13. In-hospital outcomes of SARS-CoV-2-infected health care workers in the COVID-19 pandemic first wave, Quebec, Canada.
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Darwish I, Harrison LB, Passos-Castilho AM, Labbé AC, Barkati S, Luong ML, Kong LY, Tutt-Guérette MA, Kierans J, Rousseau C, Benedetti A, Azoulay L, and Greenaway C
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- Adult, COVID-19 Vaccines, Canada epidemiology, Female, Health Personnel, Hospitals, Humans, Male, Pandemics prevention & control, Quebec epidemiology, COVID-19 epidemiology, SARS-CoV-2
- Abstract
Background: Health care workers (HCW), particularly immigrants and ethnic minorities are at increased risk for SARS-CoV-2 infection. Outcomes during a COVID-19 associated hospitalization are not well described among HCW. We aimed to describe the characteristics of HCW admitted with COVID-19 including immigrant status and ethnicity and the associated risk factors for Intensive Care unit (ICU) admission and death., Methods: Adults with laboratory-confirmed community-acquired COVID-19 hospitalized from March 1 to June 30, 2020, at four tertiary-care hospitals in Montréal, Canada were included. Demographics, comorbidities, occupation, immigration status, country of birth, ethnicity, workplace exposures, and hospital outcomes (ICU admission and death) were obtained through a chart review and phone survey. A Fine and Gray competing risk proportional hazards model was used to estimate the risk of ICU admission among HCW stratified by immigrant status and region of birth., Results: Among 1104 included persons, 150 (14%) were HCW, with a phone survey participation rate of 68%. HCWs were younger (50 vs 64 years; p<0.001), more likely to be female (61% vs 41%; p<0.001), migrants (68% vs 55%; p<0.01), non-White (65% vs 41%; p<0.001) and healthier (mean Charlson Comorbidity Index of 0.3 vs 1.2; p<0.001) compared to non-HCW. They were as likely to be admitted to the ICU (28% vs 31%; p = 0.40) but were less likely to die (4% vs. 17%; p<0.001). Immigrant HCW accounted for 68% of all HCW cases and, compared to Canadian HCW, were more likely to be personal support workers (PSW) (54% vs. 33%, p<0.01), to be Black (58% vs 4%) and to work in a Residential Care Facility (RCF) (59% vs 33%; p = 0.05). Most HCW believed that they were exposed at work, 55% did not always have access to personal protective equipment (PPE) and 40% did not receive COVID-19-specific Infection Control (IPAC) training., Conclusion: Immigrant HCW were particularly exposed to COVID-19 infection in the first wave of the pandemic in Quebec. Despite being young and healthy, one third of all HCW required ICU admission, highlighting the importance of preventing workplace transmission through strong infection prevention and control measures, including high COVID-19 vaccination coverage., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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14. Voriconazole therapeutic drug monitoring among lung transplant recipients receiving targeted therapy for invasive aspergillosis.
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Butler-Laporte G, Langevin MC, Lemieux C, Poirier C, Ferraro P, Théorêt Y, and Luong ML
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- Antifungal Agents, Drug Monitoring, Humans, Lung, Retrospective Studies, Transplant Recipients, Voriconazole therapeutic use, Aspergillosis complications, Invasive Fungal Infections drug therapy
- Abstract
Background: Voriconazole is the first line treatment for invasive aspergillosis (IA) Current guidelines suggest performing regular voriconazole therapeutic drug monitoring (TDM) to optimize treatment efficacy. We aimed to determine if TDM was predictive of clinical outcome in LTRs., Methods: Retrospective chart review was performed for all LTRs with probable or proven IA, treated with voriconazole monotherapy and who underwent TDM during therapy. Clinical outcome and toxicity were measured at 12 weeks. Classification and regression tree (CART) analysis was used to determine the most predictive voriconazole level thresholds for successful outcome., Results: One hundred and eighteen TDM samples from 30 LTRs with IA were analyzed. Three LTRs were excluded due to early treatment discontinuation. The median TDM level was 1.2 μg/ml (range 0.06-7.3). At 12 weeks, 62% (17/27) of patients had a successful outcome, while 37% (10/27) of patients failed therapy. CART analysis determined that the best predictor for successful outcome was a median TDM level >0.72 μg/ml. Seventy percent (14/20) of patients with median TDM above 0.72 μg/ml had a successful outcome, compared to 42.9% (3/7) of patients with a median TDM below 0.72 μg/ml (OR 3.11; 95% CI: 0.53-20.4; P = 0.21). CART analysis determined that a TDM level greater than 2.13 μg/ml was predictive of hepatotoxicity., Conclusions: Our data suggests that a voriconazole TDM range between 0.72 μg/ml and 2.13 μg/ml may be associated with improved outcomes. Our study is in line with current recommendations on the use of voriconazole TDM in improving outcome and minimizing toxicity in LTR with IA., (© 2022 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)
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- 2022
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15. Multicenter Evaluation of Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) Spectroscopy-Based Method for Rapid Identification of Clinically Relevant Yeasts.
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Lam LMT, Ismail AA, Lévesque S, Dufresne SF, Cheng MP, Vallières É, Luong ML, Sedman J, and Dufresne PJ
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- Fourier Analysis, Humans, Spectroscopy, Fourier Transform Infrared methods, Yeasts isolation & purification
- Abstract
Fourier transform infrared (FTIR) spectroscopy has demonstrated applicability as a reagent-free whole-organism fingerprinting technique for both microbial identification and strain typing. For routine application of this technique in microbiology laboratories, acquisition of FTIR spectra in the attenuated total reflectance (ATR) mode simplifies the FTIR spectroscopy workflow, providing results within minutes after initial culture without prior sample preparation. In our previous central work, 99.7% correct species identification of clinically relevant yeasts was achieved by employing an ATR-FTIR-based method and spectral database developed by our group. In this study, ATR-FTIR spectrometers were placed in 6 clinical microbiology laboratories over a 16-month period and were used to collect spectra of routine yeast isolates for on-site identification to the species level. The identification results were compared to those obtained from conventional biochemical tests and/or matrix-assisted laser desorption/ionization-time of flight mass spectrometry. Isolates producing discordant results were reanalyzed by routine identification methods, ATR-FTIR spectroscopy, and PCR gene sequencing of the D1/D2 and internal transcribed spacer (ITS) regions. Among the 573 routine clinical yeast isolates collected and identified by the ATR-FTIR-based method, 564 isolates (98.4%) were correctly identified at the species level, while the remaining isolates were inconclusive with no misidentifications. Due to the low prevalence of Candida auris in routine isolates, additional randomly selected C. auris ( n = 24) isolates were obtained for evaluation and resulted in 100% correct identification. Overall, the data obtained in our multicenter evaluation study using multiple spectrometers and system operators indicate that ATR-FTIR spectroscopy is a reliable, cost-effective yeast identification technique that provides accurate and timely (∼3 min/sample) species identification promptly after the initial culture.
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- 2022
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16. Clinical Practice Guideline for Solid Organ Donation and Transplantation During the COVID-19 Pandemic.
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Weiss MJ, Hornby L, Foroutan F, Belga S, Bernier S, Bhat M, Buchan CA, Gagnon M, Hardman G, Ibrahim M, Luo C, Luong ML, Mainra R, Manara AR, Sapir-Pichhadze R, Shalhoub S, Shaver T, Singh JM, Srinathan S, Thomas I, Wilson LC, Wilson TM, Wright A, and Mah A
- Abstract
The coronavirus 2019 (COVID-19) pandemic has disrupted health systems worldwide, including solid organ donation and transplantation programs. Guidance on how best to screen patients who are potential organ donors to minimize the risks of COVID-19 as well as how best to manage immunosuppression and reduce the risk of COVID-19 and manage infection in solid organ transplant recipients (SOTr) is needed., Methods: Iterative literature searches were conducted, the last being January 2021, by a team of 3 information specialists. Stakeholders representing key groups undertook the systematic reviews and generation of recommendations using a rapid response approach that respected the Appraisal of Guidelines for Research and Evaluation II and Grading of Recommendations, Assessment, Development and Evaluations frameworks., Results: The systematic reviews addressed multiple questions of interest. In this guidance document, we make 4 strong recommendations, 7 weak recommendations, 3 good practice statements, and 3 statements of "no recommendation.", Conclusions: SOTr and patients on the waitlist are populations of interest in the COVID-19 pandemic. Currently, there is a paucity of high-quality evidence to guide decisions around deceased donation assessments and the management of SOTr and waitlist patients. Inclusion of these populations in clinical trials of therapeutic interventions, including vaccine candidates, is essential to guide best practices., Competing Interests: The authors have no relevant conflicts of interest to disclose., (Copyright © 2021 The Author(s). Transplantation Direct. Published by Wolters Kluwer Health, Inc.)
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- 2021
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17. Targeted caspofungin prophylaxis for invasive aspergillosis in high-risk liver transplant recipients, a single-center experience.
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Chakravarti A, Butler-Laporte G, Carrier FM, Bilodeau M, Huard G, Corsilli D, Savard P, and Luong ML
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- Caspofungin, Cohort Studies, Humans, Retrospective Studies, Aspergillosis drug therapy, Aspergillosis epidemiology, Aspergillosis prevention & control, Liver Transplantation adverse effects
- Abstract
Background: Invasive aspergillosis (IA) is a rare but highly lethal complication after orthotopic liver transplantation (OLT). Targeted antifungal prophylaxis has been proposed as a strategy to prevent IA among orthotopic liver transplant recipient (OLTr), but limited data are available to support its efficacy., Method: We conducted a single-center, retrospective, before and after cohort study, comparing IA incidences among OLTr who did not receive antifungal prophylaxis after transplantation (cohort 1) to OLTr who received targeted antifungal prophylaxis after liver transplantation (cohort 2). Patients in cohort 2 received caspofungin prophylaxis if they presented one of the following risk factors: retransplantation, acute liver failure, dialysis, or Aspergillus colonization prior to transplantation. The primary outcome was IA at 90 days after transplantation., Results: A total of 391 OLTr were included in the study; 181 patients in the cohort 1 (no prophylaxis) and 210 patients in the cohort 2 (targeted prophylaxis). Among patients in cohort 2, 19% (40/ 210) were considered at high risk for IA and 85% (34/40) of those received caspofungin prophylaxis. The incidence of IA at 90 days was 3.3% (6/ 181) and 0.5% (1/ 210), in cohort 1 and 2, respectively (OR 0.14; 95%CI 0.01-0.83; P = .03). Ninety-day mortality was similar among the two cohorts (3.9% (7/181) and 2.4% (5/210) in cohort 1 and 2, respectively (OR 0.61; 95% 0.18-1.93; P = .40)). The 90-day mortality among the OLTs with IA was 71% (5/7)., Conclusion: Targeted caspofungin prophylaxis was associated with lower rate of IA., (© 2021 Wiley Periodicals LLC.)
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- 2021
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18. Ulcerated nodule in a 50-year old man who underwent lung transplantation.
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Lemieux A, Belisle A, and Luong ML
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- Erythema pathology, Humans, Male, Middle Aged, Opportunistic Infections, Transplant Recipients, Histoplasmosis microbiology, Lung Transplantation, Skin Ulcer microbiology
- Abstract
Competing Interests: Competing interests: Me-Linh Luong has received a researcher-initiated grant from Pfizer and consultant fees from Avir outside the submitted work. No other competing interests were declared.
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- 2020
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19. Pulmonary mucormycosis in a patient with acute liver failure: A case report and systematic review of the literature.
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Huang YQ, Tremblay JA, Chapdelaine H, Luong ML, and Carrier FM
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- Antifungal Agents therapeutic use, Brain diagnostic imaging, Drug Overdose microbiology, Female, Humans, Immunocompromised Host, Liver Failure, Acute microbiology, Lung, Lung Diseases microbiology, Middle Aged, Mucorales, Mucormycosis microbiology, Respiratory Tract Infections complications, Tomography, X-Ray Computed, Acetaminophen toxicity, Drug Overdose complications, Liver Failure, Acute complications, Lung Diseases complications, Mucormycosis complications
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Purpose: Pulmonary mucormycosis is a highly lethal invasive fungal infection usually found in immunocompromised patients. We report herein the case of an adult woman who developed pulmonary mucormycosis with possible systemic dissemination after recovering from acute liver failure secondary to acetaminophen overdose., Results: Our case developed an invasive pulmonary mucormycosis with probable systemic dissemination. She did not suffer from any immunocompromising disease other than severe acute liver failure. She did not survive the disease, although she received appropriate antifungal treatment. We also performed a systematic review of the literature on pulmonary mucormycosis, with or without dissemination, in immunocompetent patients. We found 16 cases of pulmonary or disseminated mucormycosis in immunocompetent patients. Fifty-seven percent of them died and none occurred after an acute liver failure episode., Conclusion: This case report is the first one to present an invasive pulmonary mucormycosis infection after acute liver failure in an adult patient. The clinical course of this disease is highly lethal, even in immunocompetent adults., Competing Interests: Declaration of Competing Interest None of the authors have any conflict of interest to declare., (Copyright © 2019 Elsevier Inc. All rights reserved.)
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- 2020
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20. Urinary myiasis: not your typical urinary tract infection.
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Geremy-Depatureaux A, Rouleau D, Thivierge K, Cecan A, Levesque-Beaudin V, Libman M, Giroux M, and Luong ML
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- Animals, Antiparasitic Agents administration & dosage, Diptera, Humans, Ivermectin administration & dosage, Larva, Male, Middle Aged, Myiasis drug therapy, Urinalysis, Urinary Tract Infections drug therapy, Myiasis etiology, Travel, Urinary Tract Infections parasitology
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- 2019
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21. Hiding in plain sight: A case of fever, rash, and jaundice.
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Benoit P, Meehan ME, Chapdelaine H, Vincent C, Sirdar E, Savard P, Nguyen BN, and Luong ML
- Abstract
A 25-year-old man presented to the emergency department with a 3-day history of fever, anorexia, jaundice, and a generalized skin eruption. His liver function tests showed marked cholestatic and cytolytic abnormalities without liver insufficiency. A liver biopsy was performed, and morphology with routine stains was considered non-specific. Because of the dermatological findings, the non-specific biopsy morphology, and the absence of an identified infectious etiology, a diagnosis of Kawasaki disease was presumed. However, additional colorations on liver biopsy with Warthin-Starry stain revealed multiple thin and coiled microorganisms compatible with spirochetes. His serology for leptospirosis was found to be positive for IgM, supporting the diagnosis of acute leptospirosis with liver involvement. Our case illustrates the diagnostic challenge of leptospirosis and highlights the utility of conventional laboratory tests to confirm the diagnosis. Exceptionally, Warthin-Starry stain allowed the identification of leptospires in liver biopsy and confirmed liver involvement of systemic leptospirosis., Competing Interests: The authors have nothing to disclose., (Copyright © 2019, Association of Medical Microbiology and Infectious Disease Canada (AMMI Canada).)
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- 2019
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22. Interventions to Mitigate Cognitive Biases in the Decision Making of Eye Care Professionals: A Systematic Review.
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Shlonsky A, Featherston R, Galvin KL, Vogel AP, Granger CL, Lewis C, Luong ML, and Downie LE
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- Databases, Factual, Delivery of Health Care, Humans, Qualitative Research, Bias, Cognition, Decision Making, Health Personnel standards, Optometrists standards
- Abstract
Significance: Cognitive biases, systematic errors in thinking that impact a person's choices and judgments, can influence decision making at various points during patient care provision. These biases can potentially result in misdiagnoses, delayed clinical care, and/or patient mismanagement. A range of interventions exists to mitigate cognitive biases. There is a need to understand the relative efficacy of these interventions within the context of eye care practice., Purpose: The aim of this systematic review was to synthesize the evidence relating to interventions for mitigating cognitive biases associated with clinical decision making by eye care professionals., Data Sources: Electronic databases (including Ovid MEDLINE, Embase, Scopus, PsycINFO) were searched from inception to October 2017 for studies investigating interventions intended to mitigate cognitive biases in the clinical decision making of eye care professionals. This review was undertaken in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses reporting guidelines., Study Eligibility Criteria: To ensure inclusion of all relevant literature, a wide range of study designs was eligible for inclusion, such as randomized controlled trials, nonrandomized trials, interrupted time series and repeated measures, controlled before-after studies, and qualitative studies that were a component of any of these quantitative study designs., Study Appraisal and Synthesis Methods: Two review authors independently screened titles, abstracts, and full-text articles in duplicate, applying a priori eligibility criteria., Results: After screening 2759 nonduplicate records, including full-text screening of 201 articles, no relevant studies were identified., Conclusions and Implications of Findings: Given that cognitive biases can significantly impact the accuracy of clinical decision making and thus can have major effects on clinical care and patient health outcomes, the lack of studies identified in this systematic review indicates a critical need for research within the area of cognitive bias mitigation for decision making within eye care practice.
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- 2019
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23. Identification of Candida auris by Use of the Updated Vitek 2 Yeast Identification System, Version 8.01: a Multilaboratory Evaluation Study.
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Ambaraghassi G, Dufresne PJ, Dufresne SF, Vallières É, Muñoz JF, Cuomo CA, Berkow EL, Lockhart SR, and Luong ML
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- Automation, Laboratory, Canada, Candida classification, Candidiasis microbiology, Hospitals, Humans, Phenotype, Candida isolation & purification, Clinical Laboratory Techniques
- Abstract
Candida auris is an emerging multidrug-resistant yeast that has been systematically incorrectly identified by phenotypic methods in clinical microbiology laboratories. The Vitek 2 automated identification system (bioMérieux) recently included C. auris in its database (version 8.01). We evaluated the performance of the Vitek 2 YST ID card to identify C. auris and related species. A panel of 44 isolates of Candida species ( C. auris , n = 35; Candida haemulonii , n = 5; Candida duobushaemulonii , n = 4) were tested by three different hospital-based microbiology laboratories. Among 35 isolates of C. auris , Vitek 2 yielded correct identification in an average of 52% of tested samples. Low-discrimination (LD) results with an inability to distinguish between C. auris , C. duobushaemulonii , and Candida famata were obtained in an average of 27% of samples. Incorrect identification results were obtained in an average of 21% of samples, the majority (91%) of which were reported as C. duobushaemulonii and the remaining 9% of which were reported as Candida lusitaniae /C. duobushaemulonii. The proportion of correct identification was not statistically different across different centers ( P = 0.78). Stratification by genetic clades demonstrated that 100% ( n = 8) of the strains of the South American clade were correctly identified compared to 7% ( n = 10) and 0% ( n = 4) from the African and East Asian clades, respectively. None of the non- auris Candida strains ( n = 9) were incorrectly identified as C. auris Our results show that the Vitek 2 (version 8.01) yeast identification system has a limited ability to correctly identify C. auris These data suggest that an identification result for C. duobushaemulonii should warrant further testing to rule out C. auris The overall performance of the Vitek 2 seems to differ according to C. auris genetic clade, with the South American isolates yielding the most accurate results., (Copyright © 2019 American Society for Microbiology.)
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- 2019
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24. Helicobacter cinaedi bacteremia mimicking eosinophilic fasciitis in a patient with X-linked agammaglobulinemia.
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Hill A, Byrne A, Bouffard D, Luong ML, Saber M, and Chapdelaine H
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- 2018
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25. Letter: the safety of herpes zoster vaccination for patients with inflammatory bowel disease being treated with anti-TNF medications.
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Côté-Daigneault J, Luong ML, Colombel JF, and Peerani F
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- Herpes Zoster, Humans, Vaccination, Inflammatory Bowel Diseases, Tumor Necrosis Factor-alpha
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- 2018
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26. Utility of voriconazole therapeutic drug monitoring: a meta-analysis.
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Luong ML, Al-Dabbagh M, Groll AH, Racil Z, Nannya Y, Mitsani D, and Husain S
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- Antifungal Agents adverse effects, Humans, Invasive Fungal Infections prevention & control, Treatment Outcome, Voriconazole adverse effects, Antifungal Agents blood, Antifungal Agents therapeutic use, Drug Monitoring, Invasive Fungal Infections drug therapy, Mycoses drug therapy, Voriconazole blood, Voriconazole therapeutic use
- Abstract
Background: Voriconazole therapeutic drug monitoring (TDM) is increasingly used in clinical practice. However, the utility of voriconazole TDM to guide therapy remains uncertain and controversial. We conducted a meta-analysis of studies assessing the relationship between voriconazole serum concentration and clinical outcomes of success and toxicity., Methods: We searched bibliographic databases for studies on voriconazole serum concentrations and clinical outcomes. We compared success outcomes between patients with therapeutic and subtherapeutic voriconazole serum concentrations, and toxicity outcomes between patients with and without supratherapeutic serum concentrations., Results: Twenty-four studies were analysed. Pooled analysis for efficacy endpoint demonstrated that patients with therapeutic voriconazole serum concentrations (1.0-2.2 mg/L) were more likely to have successful outcomes compared with those with subtherapeutic voriconazole serum concentrations (OR 2.30; 95% CI 1.39-3.81). A therapeutic threshold of 1.0 mg/L was most predictive of successful outcome (OR 1.94; 95% CI 1.04-3.62). Patients with therapeutic concentrations did not have better survival rates. Pooled analysis for toxicity endpoint demonstrated that patients with supratherapeutic voriconazole serum concentrations (4.0-6.0 mg/L) were at increased risk of toxicity (OR 4.17; 95% CI 2.08-8.36). A supratherapeutic threshold of 6.0 mg/L was most predictive of toxicity (OR 4.60; 95% CI 1.49-14.16)., Conclusions: Patients with therapeutic voriconazole serum concentrations were twice as likely to achieve successful outcomes. The likelihood of toxicity associated with supratherapeutic voriconazole serum concentrations was 4-fold that of therapeutic concentrations. Our findings suggest that the use of voriconazole TDM to aim for serum concentrations between 1.0 and 6.0 mg/L during therapy may be warranted to optimize clinical success and minimize toxicity., (© The Author 2016. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2016
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27. The 2015 International Society for Heart and Lung Transplantation Guidelines for the management of fungal infections in mechanical circulatory support and cardiothoracic organ transplant recipients: Executive summary.
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Husain S, Sole A, Alexander BD, Aslam S, Avery R, Benden C, Billaud EM, Chambers D, Danziger-Isakov L, Fedson S, Gould K, Gregson A, Grossi P, Hadjiliadis D, Hopkins P, Luong ML, Marriott DJE, Monforte V, Muñoz P, Pasqualotto AC, Roman A, Silveira FP, Teuteberg J, Weigt S, Zaas AK, Zuckerman A, and Morrissey O
- Subjects
- Adult, Child, Humans, Incidence, Mycoses epidemiology, Postoperative Complications epidemiology, Prevalence, Assisted Circulation, Heart-Lung Transplantation, Mycoses diagnosis, Mycoses therapy, Postoperative Complications diagnosis, Postoperative Complications therapy
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- 2016
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28. The Effectiveness of Culture-Directed Preemptive Anti-Aspergillus Treatment in Lung Transplant Recipients at One Year After Transplant.
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Hosseini-Moghaddam SM, Chaparro C, Luong ML, Azad S, Singer LG, Mazzulli T, Rotstein C, Keshavjee S, and Husain S
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- Adult, Antilymphocyte Serum adverse effects, Aspergillus classification, Aspergillus immunology, Aspergillus isolation & purification, Chi-Square Distribution, Drug Administration Schedule, Female, Humans, Immunocompromised Host, Immunosuppressive Agents adverse effects, Invasive Pulmonary Aspergillosis diagnosis, Invasive Pulmonary Aspergillosis immunology, Invasive Pulmonary Aspergillosis microbiology, Invasive Pulmonary Aspergillosis mortality, Logistic Models, Lung Transplantation mortality, Male, Middle Aged, Multivariate Analysis, Odds Ratio, Proportional Hazards Models, Retrospective Studies, Risk Factors, Time Factors, Treatment Outcome, Antifungal Agents administration & dosage, Aspergillus drug effects, Invasive Pulmonary Aspergillosis prevention & control, Lung Transplantation adverse effects, Respiratory System microbiology
- Abstract
Background: Invasive pulmonary aspergillosis (IPA) is a significant complication after lung transplantation. However, the risk factors for IPA in patients colonized with Aspergillus species, and the effectiveness of culture-directed preemptive treatment, are not well known., Methods: We studied 328 lung transplant recipients, from January 2006 to July 2009, with 1-year follow-up. Risk factors and effectiveness of culture-directed preemptive treatment were evaluated via a Cox-proportional hazard model., Results: Seventy-one recipients (21.6%) developed invasive fungal infections, including 29 patients (8.8%) with IPA. Only 48.3% (14/29) of patients with IPA had pretransplantation or posttransplantation airway colonization with Aspergillus spp. In the Cox-proportional hazard model, treatment with rabbit antithymocyte globulin was significantly associated with posttransplant IPA in patients with Aspergillus colonization (hazards ratio, 4.25; 95% confidence interval, 1.09-16.6). Preemptive antifungal treatment for 3 months was significantly associated with a lower rate of IPA (0% [0/36] vs 18% [14/77]; P = 0.003, odds ratio, 0.8; 95% confidence interval, 0.7-0.9) but did not impact mortality., Conclusions: Our data suggest that almost half the cases of IPA occurred in patients without pretransplantation or posttransplantation airway colonization with Aspergillus spp. Among patients with Aspergillus colonization, use of rabbit antithymocyte globulin was associated with 4-fold risk of subsequent development of IPA. Invasive pulmonary aspergillosis was an independent risk factor for 1-year mortality. Use of preemptive antifungal treatment for 3 months may be associated with significant reduction of IPA without influencing mortality.
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- 2015
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29. Rate of cyp51A mutation in Aspergillus fumigatus among lung transplant recipients with targeted prophylaxis.
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Shalhoub S, Luong ML, Howard SJ, Richardson S, Singer LG, Chaparro C, Keshavjee S, Akinlolu Y, Rotstein C, Mazzulli T, and Husain S
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- Aspergillus fumigatus genetics, Aspergillus fumigatus isolation & purification, Chemoprevention methods, Humans, Prospective Studies, Transplant Recipients, Antifungal Agents therapeutic use, Aspergillus fumigatus enzymology, Cytochrome P-450 Enzyme System genetics, Fungal Proteins genetics, Lung Transplantation, Mutation Rate, Pulmonary Aspergillosis microbiology, Voriconazole therapeutic use
- Abstract
Objectives: The most common mechanism of azole (itraconazole and voriconazole) resistance in Aspergillus fumigatus is a mutation at the cyp51A locus. The aim of our study was to determine the rate of cyp51A mutations in lung transplant recipients (LTR) undergoing targeted antifungal prophylaxis with 12 weeks of voriconazole., Methods: We conducted a prospective study that included 22 LTR with A. fumigatus between October 2008 and November 2011. Of those, 10 LTR were colonized with A. fumigatus and 12 had invasive pulmonary aspergillosis., Results: Four patients were found to have A. fumigatus isolates with a cyp51A mutation, two had colonization and two had invasive pulmonary aspergillosis. The remaining 18 LTR had WT cyp51A A. fumigatus isolates. All A. fumigatus isolates (except one due to mixed growth) were tested for antifungal susceptibility. A total of nine LTR were exposed to azoles prior to A. fumigatus isolation for a median duration of 249 (IQR 99-524) days. Azole exposure preceded the isolation of two mutant isolates and seven WT isolates. None of the cyp51A mutant isolates conferred phenotypic resistance to azoles., Conclusions: Targeted antifungal prophylaxis in LTR did not lead to cyp51A resistance mutations in this cohort. Data on larger cohorts who receive universal antifungal prophylaxis are needed., (© The Author 2015. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2015
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30. Impact of race and diagnostic label on older adults' emotions, illness beliefs, and willingness to help a family member with osteoarthritis.
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Mingo CA, McIlvane JM, Haley WE, and Luong ML
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- Black or African American psychology, Black or African American statistics & numerical data, Aged, Analysis of Variance, Caregivers statistics & numerical data, Culture, Family psychology, Female, Humans, Male, Osteoarthritis ethnology, Osteoarthritis therapy, Racial Groups statistics & numerical data, Random Allocation, White People psychology, White People statistics & numerical data, Attitude to Health ethnology, Caregivers psychology, Emotions, Osteoarthritis psychology, Racial Groups psychology
- Abstract
Objective: To examine how race and the diagnostic label of Osteoarthritis (OA) affects older adults' emotions, illness beliefs, and willingness to help a family member., Methods: African American and White older adults were randomly assigned to read vignettes describing a sister suffering from chronic pain and disability, either with or without the OA label. Race × diagnostic label ANOVAs were conducted., Results: Compared to Whites, African Americans were more optimistic that OA could improve with health care, and showed greater willingness to help their sister. The OA label had little impact on emotions, beliefs, or willingness to help. African Americans rated the sister as having more control of their problem than Whites without the OA label, but providing the diagnosis eliminated this difference., Discussion: The diagnostic label of OA had little effect on these older adults, but racial differences indicate that cultural values regarding family caregiving are important in arthritis care., (© The Author(s) 2013.)
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- 2015
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31. PHOTO QUIZ. A 58-year-old renal transplant recipient with Fever and progressive dyspnea.
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St-Pierre J, Rioux-Massé B, Hou H, Savard P, and Luong ML
- Subjects
- Dyspnea microbiology, Fatal Outcome, Fever microbiology, Humans, Male, Middle Aged, Histoplasma, Histoplasmosis diagnosis, Kidney Transplantation adverse effects
- Published
- 2014
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32. Pretransplant Aspergillus colonization of cystic fibrosis patients and the incidence of post-lung transplant invasive aspergillosis.
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Luong ML, Chaparro C, Stephenson A, Rotstein C, Singer LG, Waters V, Azad S, Keshavjee S, Tullis E, and Husain S
- Subjects
- Adult, Antifungal Agents therapeutic use, Bronchoalveolar Lavage Fluid microbiology, Female, Humans, Immunosuppressive Agents adverse effects, Incidence, Invasive Pulmonary Aspergillosis epidemiology, Male, Postoperative Complications, Retrospective Studies, Risk Factors, Sputum microbiology, Time Factors, Aspergillus pathogenicity, Cystic Fibrosis complications, Cystic Fibrosis microbiology, Invasive Pulmonary Aspergillosis complications, Lung Transplantation methods
- Abstract
Background: Invasive aspergillosis (IA) is an important cause of morbidity and mortality among patients undergoing lung transplant. Cystic fibrosis-lung transplant recipients (CF-LTRs) may be at greater risk of IA following lung transplantation because of the presence of Aspergillus in their airways before transplantation. This study evaluated the impact of pretransplant Aspergillus colonization on the risk for IA among CF-LTRs., Methods: A single-center retrospective cohort study of CF-LTRs was conducted between 2006 and 2010. Respiratory tract cultures before transplantation were reviewed to identify patients with pretransplant Aspergillus colonization. Patients with positive Aspergillus sputum culture or positive bronchoalvelolar lavage (BAL) galactomannan after transplantation were classified as having colonization or disease according to the International Society of Heart and Lung Transplantation criteria., Results: A total of 93 CF patients underwent lung transplantation. Seventy percent (65/93) of CF-LTRs had pretransplant Aspergillus colonization. Thirty-six patients had positive intraoperative Aspergillus culture from the native lung BAL. Overall, 22.5% (20/93) of CF-LTRs developed IA. Median time to IA was 42 days following transplantation. Positive intraoperative Aspergillus culture (OR 4.36, 95% CI 1.35-14.05, P=0.01) and treatment for acute cellular rejection within 90 days after transplantation (OR 3.53, 95% CI 1.03-12.15, P=0.05) were independent risk factors for IA. Antifungal prophylaxis was administered to 61% (57/93) of CF-LTRs. One-year mortality rate was 16% (15/93). IA was not associated with increased risk of death (OR 2.10, 95% CI 0.62-7.06, P=0.23)., Conclusion: Pretransplant Aspergillus colonization is frequent among CF-LTRs and a positive intraoperative Aspergillus culture produced a fourfold higher risk of developing IA.
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- 2014
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33. Independent associations of socioeconomic factors with disability and pain in adults with knee osteoarthritis.
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Cleveland RJ, Luong ML, Knight JB, Schoster B, Renner JB, Jordan JM, and Callahan LF
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- Aged, Arthralgia diagnosis, Arthralgia physiopathology, Comorbidity, Cross-Sectional Studies, Educational Status, Female, Humans, Knee Joint diagnostic imaging, Linear Models, Male, Middle Aged, Multivariate Analysis, North Carolina, Occupations, Osteoarthritis, Knee diagnosis, Osteoarthritis, Knee physiopathology, Pain Measurement, Poverty, Predictive Value of Tests, Radiography, Risk Factors, Severity of Illness Index, Social Class, Arthralgia etiology, Disability Evaluation, Knee Joint physiopathology, Osteoarthritis, Knee complications, Socioeconomic Factors
- Abstract
Background: The purpose of this study is to explore the relationship between function, pain and stiffness outcomes with individual and community socioeconomic status (SES) measures among individuals with radiographic knee osteoarthritis (rOA)., Methods: Cross-sectional data from the Johnston County Osteoarthritis Project were analyzed for adults age 45 and older with knee rOA (n = 782) and a subset with both radiographic and symptomatic knee OA (n = 471). Function, pain and stiffness were measured using the Western Ontario and McMasters Universities Index of Osteoarthritis (WOMAC). Individual SES measures included educational attainment (<12 years, ≥12 years) and occupation type (managerial, non-managerial), while community SES was measured using Census block group poverty rate (<12%, 12-25%, ≥25%). SES measures were individually and simultaneously examined in linear regression models adjusting for age, gender, race, body mass index (BMI), occupational physical activity score (PAS), comorbidity count, and presence of hip symptoms., Results: In analyses among all individuals with rOA, models which included individual SES measures were observed to show that occupation was significantly associated with WOMAC Function (β =2.91, 95% Confidence Interval (CI) = 0.68-5.14), WOMAC Pain (β =0.93, 95% CI = 0.26-1.59) and WOMAC Total scores (β =4.05, 95% CI = 1.04-7.05), and education was significantly associated with WOMAC Function (β =3.57, 95% CI = 1.25-5.90) and WOMAC Total (β =4.56, 95% CI = 1.41-7.70) scores. In multivariable models including all SES measures simultaneously, most associations were attenuated. However, statistically significant results for education remained between WOMAC Function (β =2.83, 95% CI = 0.38-5.28) and WOMAC Total (β =3.48, 95% CI = 0.18-6.78), as well as for the association between occupation and WOMAC Pain (β =0.78, 95% CI = 0.08-1.48). In rOA subgroup analyses restricted to those with symptoms, we observed a significant increase in WOMAC Pain (β =1.36, 95% CI = 0.07-2.66) among individuals living in a block group with poverty rates greater than 25%, an association that remained when all SES measures were considered simultaneously (β =1.35, 95% CI = 0.06-2.64)., Conclusions: Lower individual and community SES are both associated with worse function and pain among adults with knee rOA.
- Published
- 2013
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34. Pharmacoeconomic assessment of therapy for invasive aspergillosis.
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Luong ML, Husain S, and Rotstein C
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- Amphotericin B economics, Amphotericin B therapeutic use, Antifungal Agents therapeutic use, Aspergillosis economics, Clinical Trials as Topic, Cost-Benefit Analysis, Empirical Research, Humans, Length of Stay economics, Pyrimidines therapeutic use, Treatment Outcome, Triazoles therapeutic use, Voriconazole, Antifungal Agents economics, Aspergillosis drug therapy, Pyrimidines economics, Triazoles economics
- Abstract
Invasive aspergillosis (IA) is a major cause of morbidity and mortality in immunocompromised hosts. Economic expenditures prompted by this invasive fungal infection (IFI) are significant. Although, the duration and associated costs of hospitalization comprise the largest proportion of costs in large surveillance studies, the newer oral antifungal agents may impact significantly on these costs. A review of the pharmacoeconomic (PE) studies is provided focussing on primary therapy, salvage therapy, empiric therapy and prophylaxis for IA. PE evaluations have demonstrated the cost effectiveness and dominance of voriconazole for targeted primary treatment of IA compared with other available agents. Differences in the drug choice and analytic methodology of the PE analyses of empiric antifungal strategy hamper definitive conclusions about the agents employed as empiric antifungal that may be directed at suspected IA although both caspofungin and voriconazole appear to be cost effective and dominant over liposomal amphotericin B (LAmB), whereas LAmB is more costly than conventional amphotericin B. Posaconazole is the most cost-effective agent for antifungal prophylaxis against IFI and IA., (© 2013 Blackwell Verlag GmbH.)
- Published
- 2013
- Full Text
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35. Social determinants and osteoarthritis outcomes.
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Luong ML, Cleveland RJ, Nyrop KA, and Callahan LF
- Abstract
Osteoarthritis (OA) is one of the most frequently occurring musculoskeletal diseases, posing a significant public health problem due to its impact on pain and disability. Traditional risk factors fail to account for all of the risk observed for OA outcomes. In recent years, our view of disease causation has broadened to include health risks that are created by an individual's socioeconomic circumstances. Early research into social determinants has focused on social position and explored factors related to the individual such as education, income and occupation. Results from these investigations suggest that low education attainment and nonprofessional occupation are associated with poorer arthritis outcomes. More recently, research has expanded to examine how one's neighborhood socioeconomic environment may be relevant to OA outcomes. This narrative review proposes a framework to help guide our understanding of how social context may interact with pathophysiological processes and individual-level variables to influence health outcomes in those living with OA.
- Published
- 2012
- Full Text
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36. Risk factors for voriconazole hepatotoxicity at 12 weeks in lung transplant recipients.
- Author
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Luong ML, Hosseini-Moghaddam SM, Singer LG, Chaparro C, Azad S, Lazar N, Boutros PC, Keshavjee S, Rotstein C, and Husain S
- Subjects
- Adolescent, Adult, Aged, Female, Humans, Male, Middle Aged, Retrospective Studies, Risk Factors, Voriconazole, Young Adult, Antifungal Agents adverse effects, Liver drug effects, Lung Transplantation, Pyrimidines adverse effects, Triazoles adverse effects
- Abstract
Voriconazole is commonly used for prophylaxis and treatment of invasive aspergillosis in lung transplant recipients. However, the use of voriconazole may at times be limited by the development of hepatotoxicity. Our goal is to determine predictors of voriconazole-associated hepatotoxicity in lung transplant recipients. We conducted a single center retrospective cohort study of lung transplant recipients from 2006 to 2010 who received voriconazole therapy. We compared characteristics of patients who developed hepatotoxicity and those who did not. One hundred five lung transplant recipients received voriconazole. Hepatotoxicity occurred in 51% (54/105) of patients and lead to discontinuation in 34% (36/105). In univariate analysis, age less than 40 years, cystic fibrosis, use of azathioprine, history of liver disease and early initiation of voriconazole were associated with hepatotoxicity. In multivariable logistic regression analysis, perioperative initiation of voriconazole (within 30 days of transplantation) was independently associated with hepatotoxicity (OR 4.37, 95% CI: 1.53-12.43, p = 0.006). The five risk factors identified in the univariate analysis were used to build a K-nearest neighbor algorithm predictive model for hepatotoxicity. This model predicted hepatotoxicity with an accuracy of 70%. Voriconazole therapy initiated within the first 30 days of transplantation is associated with a greater risk of developing hepatotoxicity., (© Copyright 2012 The American Society of Transplantation and the American Society of Transplant Surgeons.)
- Published
- 2012
- Full Text
- View/download PDF
37. Comparison of an Aspergillus real-time polymerase chain reaction assay with galactomannan testing of bronchoalvelolar lavage fluid for the diagnosis of invasive pulmonary aspergillosis in lung transplant recipients.
- Author
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Luong ML, Clancy CJ, Vadnerkar A, Kwak EJ, Silveira FP, Wissel MC, Grantham KJ, Shields RK, Crespo M, Pilewski J, Toyoda Y, Kleiboeker SB, Pakstis D, Reddy SK, Walsh TJ, and Nguyen MH
- Subjects
- Adult, Aged, Aspergillus fumigatus chemistry, Aspergillus fumigatus genetics, Bronchoalveolar Lavage Fluid chemistry, DNA, Fungal genetics, Female, Galactose analogs & derivatives, Humans, Immunoenzyme Techniques methods, Lung Transplantation, Male, Mannans analysis, Middle Aged, Sensitivity and Specificity, Transplantation, Aspergillus fumigatus isolation & purification, Bronchoalveolar Lavage Fluid microbiology, Clinical Laboratory Techniques methods, Invasive Pulmonary Aspergillosis diagnosis, Mycology methods, Polymerase Chain Reaction methods
- Abstract
Background: Early diagnosis and treatment of invasive pulmonary aspergillosis (IPA) improves outcome., Methods: We compared the performance of publicly available pan-Aspergillus, Aspergillus fumigatus-, and Aspergillus terreus-specific real-time polymerase chain reaction (PCR) assays with the Platelia galactomannan (GM) assay in 150 bronchoalveolar lavage (BAL) samples from lung transplant recipients (16 proven/probable IPA, 26 Aspergillus colonization, 11 non-Aspergillus mold colonization, and 97 negative controls)., Results: The sensitivity and specificity of pan-Aspergillus PCR (optimal quantification cycle [Cq], ≤35.0 by receiver operating characteristic analysis) and GM (≥.5) for diagnosing IPA were 100% (95% confidence interval, 79%-100%) and 88% (79%-92%), and 93% (68%-100%) and 89% (82%-93%), respectively. The sensitivity and specificity of A. fumigatus-specific PCR were 85% (55%-89%) and 96% (91%-98%), respectively. A. terreus-specific PCR was positive for the 1 patient with IPA due to this species; specificity was 99% (148 of 149 samples). Aspergillus PCR identified 1 patient with IPA not diagnosed by GM. For BAL samples associated with Aspergillus colonization, the specificity of GM (92%) was higher than that of pan-Aspergillus PCR (50%; P = .003). Among negative control samples, the specificity of pan-Aspergillus PCR (97%) was higher than that of BAL GM (88%; P = .03). Positive results for both BAL PCR and GM testing improved the specificity to 97% with minimal detriment to sensitivity (93%)., Conclusions: A recently developed pan-Aspergillus PCR assay and GM testing of BAL fluid may facilitate the diagnosis of IPA after lung transplantation. A. fumigatus- and A. terreus-specific real-time PCR assays may be useful in rapidly identifying the most common cause of IPA and a species that is intrinsically resistant to amphotericin B, respectively.
- Published
- 2011
- Full Text
- View/download PDF
38. Leptospirosis: pulmonary hemorrhage in a returned traveller.
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Leung V, Luong ML, and Libman M
- Subjects
- Adult, Fever etiology, Hemoptysis microbiology, Humans, Leptospirosis diagnosis, Malaysia, Male, Travel, Hemoptysis etiology, Leptospirosis complications
- Published
- 2011
- Full Text
- View/download PDF
39. The association of disability and pain with individual and community socioeconomic status in people with hip osteoarthritis.
- Author
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Knight JB, Callahan LF, Luong ML, Shreffler J, Schoster B, Renner JB, and Jordan JM
- Abstract
Objective: To examine associations between disability and socioeconomic status (SES) in persons with hip radiographic OA (rOA) or symptomatic OA (sxOA) in the Johnston County Osteoarthritis Project., Methods: Cross-sectional analyses were conducted on individuals with hip rOA (708) or sxOA (251). rOA was defined as Kellgren-Lawrence ≥ 2. Educational attainment (<12 years or ≥12 years) and occupation (managerial or non-managerial) were individual SES measures. Census block group poverty rate (<12%, 12-25%, ≥25%) was the community SES measure. Disability was measured by the HAQ-DI and the WOMAC (function, pain, total). Covariates included age, gender, race, BMI, and presence of knee symptoms. Analyses examined associations of disability with each SES effect separately, followed by multivariable analyses using all SES variables, adjusting for covariates., Results: In models with single SES variables adjusted for covariates, WOMAC scores were associated significantly (p<0.05) with low educational attainment and non-managerial occupation in rOA and sxOA. HAQ was significantly associated with low educational attainment in rOA and sxOA and with high community poverty in rOA. In models including all SES variables, the patterns of association were similar although with diminished significance. There was indication that education was more strongly associated with HAQ and WOMAC function, while occupation was more strongly associated with WOMAC pain., Conclusion: Our data provide evidence that individual SES is an important factor to consider when examining disability and pain outcomes in older adults with hip OA.
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- 2011
- Full Text
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40. Assessment of infection risks prior to lung transplantation.
- Author
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Luong ML, Morrissey O, and Husain S
- Subjects
- Bacterial Infections epidemiology, Bacterial Infections etiology, Humans, Immunosuppression Therapy adverse effects, Mycoses epidemiology, Mycoses etiology, Preoperative Period, Recurrence, Respiratory System microbiology, Risk Assessment, Bacterial Infections prevention & control, Lung Transplantation, Mycoses prevention & control, Postoperative Complications epidemiology, Postoperative Complications microbiology
- Abstract
Purpose of This Review: Infections are major causes of morbidity and mortality after lung transplantation. Pretransplant evaluation can identify patients at risk of infectious complications and guide prophylactic strategies post transplantation. This review focuses on studies published from 2006 to the present that relate to the assessment of risk of infection prior to lung transplantation., Recent Findings: Pretransplant airways colonization with Pseudomonas, Burkholderia, nontuberculosis mycobacteria, Aspergillus and Scedosporium tend to recur after transplantation and cause disease in the lung allograft. Recently, colonization with Pseudomonas and Aspergillus species has been implicated in the subsequent development of allograft dysfunction. B. cenocepacia and Mycobacterium abscessus are particularly associated with poor outcomes after lung transplantation and are considered to be relative contra-indications to lung transplantation in many centers. Tuberculin skin test (TST) has limited value in predicting tuberculosis (TB) reactivation; however, in the absence of a better test, it remains the gold standard for screening patients with latent TB. Serologic screening for histoplasmosis and toxoplasmosis has limited value as these infections rarely occur after lung transplantation., Summary: Recurrence of pretransplant airway infection and reactivation of latent infection are potential sources of infection after lung transplantation. Prospective studies are needed to determine the efficacy of prophylactic antimicrobial strategies.
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- 2010
- Full Text
- View/download PDF
41. Lactobacillus probiotic use in cardiothoracic transplant recipients: a link to invasive Lactobacillus infection?
- Author
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Luong ML, Sareyyupoglu B, Nguyen MH, Silveira FP, Shields RK, Potoski BA, Pasculle WA, Clancy CJ, and Toyoda Y
- Subjects
- Empyema, Pleural epidemiology, Gram-Positive Bacterial Infections epidemiology, Humans, Lacticaseibacillus rhamnosus classification, Lacticaseibacillus rhamnosus genetics, Lacticaseibacillus rhamnosus isolation & purification, Male, Middle Aged, RNA, Ribosomal, 16S genetics, Sequence Analysis, DNA, Empyema, Pleural microbiology, Gram-Positive Bacterial Infections microbiology, Heart Transplantation adverse effects, Lacticaseibacillus rhamnosus pathogenicity, Lung Transplantation adverse effects, Probiotics therapeutic use
- Abstract
Organisms contained in probiotics are generally regarded as non-pathogenic and safe to administer. However, increasing reports of probiotic-associated infection raise concern over the safety of these products. We report a case of Lactobacillus empyema in a human immunodeficiency virus-infected lung transplant recipient receiving a probiotic containing Lactobacillus rhamnosus GG. We compare the epidemiology of Lactobacillus infections in heart and lung transplant recipients at our institution before and after the introduction of this probiotic, and discuss the potential mechanism for Lactobacillus within the probiotic to cause infections and disseminate., (© 2010 John Wiley & Sons A/S.)
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- 2010
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42. Early removal of central venous catheters and outcomes from candidemia.
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Koh GC and Luong ML
- Subjects
- Humans, Treatment Outcome, Withholding Treatment, Candidemia therapy, Catheterization, Central Venous adverse effects, Catheters, Indwelling adverse effects
- Published
- 2010
- Full Text
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43. Clinical utility and prognostic value of bronchoalveolar lavage galactomannan in patients with hematologic malignancies.
- Author
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Luong ML, Filion C, Labbé AC, Roy J, Pépin J, Cadrin-Tourigny J, Carignan S, Sheppard DC, and Laverdière M
- Subjects
- Antigens, Fungal analysis, Aspergillus immunology, Bronchoalveolar Lavage, Bronchoscopy, Canada, Cohort Studies, Female, Galactose analogs & derivatives, Hematopoietic Stem Cell Transplantation, Humans, Immunoenzyme Techniques, Invasive Pulmonary Aspergillosis microbiology, Male, Mannans immunology, Middle Aged, Mycological Typing Techniques, Opportunistic Infections diagnosis, Opportunistic Infections microbiology, Predictive Value of Tests, Prognosis, Retrospective Studies, Sensitivity and Specificity, Aspergillus isolation & purification, Bronchoalveolar Lavage Fluid chemistry, Hematologic Neoplasms complications, Invasive Pulmonary Aspergillosis diagnosis, Mannans analysis
- Abstract
We conducted a single-center retrospective cohort study to determine the performance characteristics of the galactomannan (GM) assay in bronchoalveolar lavage (BAL) in patients with hematologic malignancies. Patients were classified as proven, probable, possible, or no invasive pulmonary aspergillosis (IPA), according to international guidelines. A total of 173 BAL samples from 145 patients were included. There were 5 proven, 7 probable, and 35 possible cases of IPA. Using a GM index cutoff of ≥ 0.5, the sensitivity, specificity, and positive and negative predictive values (PPV and NPV, respectively) of the BAL GM assay were 100%, 78%, 26%, and 100%, respectively. Using a GM index cutoff of ≥ 2.0, the sensitivity and NPV remained 100%, but specificity and PPV increased to 93% and 50%, respectively. The BAL GM assay is a highly sensitive screening test for IPA in patients with hematologic malignancies. Increasing the cutoff value to 2.0 would improve the performance of this assay., (Copyright © 2010 Elsevier Inc. All rights reserved.)
- Published
- 2010
- Full Text
- View/download PDF
44. Vaginal douching, bacterial vaginosis, and spontaneous preterm birth.
- Author
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Luong ML, Libman M, Dahhou M, Chen MF, Kahn SR, Goulet L, Séguin L, Lydon J, McNamara H, Platt RW, and Kramer MS
- Subjects
- Adult, Case-Control Studies, Female, Humans, Multivariate Analysis, Obstetric Labor, Premature epidemiology, Pregnancy, Prospective Studies, Risk Factors, Premature Birth epidemiology, Vaginal Douching adverse effects, Vaginosis, Bacterial epidemiology
- Abstract
Objective: Vaginal douching and bacterial vaginosis (BV) are independently associated with spontaneous preterm birth. Because the interrelationships among these variables remain unclear, we sought to examine the associations in a prospective study., Methods: We conducted a nested case-control study within a prospectively recruited cohort of pregnant women. We prospectively collected demographic and health status data, data on pre-pregnancy vaginal douching, vaginal smears for bacterial vaginosis as defined by Nugent's criteria, fetal fibronectin at 26 weeks of pregnancy, and placental pathology at delivery. Spontaneous preterm births before 37 weeks' gestation were selected as cases. All spontaneous births occurring after 37 weeks were potential control subjects. To limit costs, some tests were performed only in selected control subjects., Results: Preterm birth occurred in 207 of 5092 women (4.1%). In bivariate analysis, BV was not associated with preterm birth (OR 1.2; 95% CI 0.5 to 2.4). Vaginal douching was significantly associated with bacterial vaginosis (P < 0.05) and preterm birth (P < 0.05). On multivariate analysis, vaginal douching was no longer associated with preterm birth, but a significant association with early preterm birth < 34 weeks (OR, 6.9; 95% CI 1.7 to 28.2) and preterm birth due to preterm labour (OR 3.0; 95% CI 1.1 to 8.5) persisted after controlling for the presence of bacterial vaginosis and placental inflammation., Conclusion: Vaginal douching and bacterial vaginosis were not associated with spontaneous preterm birth overall. However, vaginal douching appears to be an independent and potentially modifiable risk factor for early preterm birth (32-34 weeks), although the mechanism remains unclear.
- Published
- 2010
- Full Text
- View/download PDF
45. Training, communication, and competence: the making of health care professionals.
- Author
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Luong ML
- Subjects
- Anthropology, Cultural Competency, Global Health, Humans, Physician-Patient Relations, Public Health, Clinical Competence, Communication, Health Personnel education
- Abstract
The role of medical anthropology in tackling the problems and challenges at the intersections of public health, medicine, and technology was addressed during the 2009 Society for Medical Anthropology Conference at Yale University in an interdisciplinary panel session entitled Training, Communication, and Competence: The Making of Health Care Professionals.
- Published
- 2009
46. First report of isolation and characterization of Aurantimonas altamirensis from clinical samples.
- Author
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Luong ML, Békal S, Vinh DC, Lauzon D, Leung V, Al-Rawahi GN, Ng B, Burdz T, and Bernard K
- Subjects
- Alphaproteobacteria genetics, Bacterial Typing Techniques, Canada, Contact Lens Solutions, Contact Lenses microbiology, Cornea microbiology, Corneal Diseases microbiology, DNA, Bacterial chemistry, DNA, Bacterial genetics, DNA, Ribosomal chemistry, DNA, Ribosomal genetics, Eye Injuries, Penetrating complications, Humans, Molecular Sequence Data, Phylogeny, RNA, Ribosomal, 16S genetics, Sequence Analysis, DNA, Sputum microbiology, Alphaproteobacteria classification, Alphaproteobacteria isolation & purification
- Abstract
The genus Aurantimonas, proposed in 2003, encompasses four species from environmental sources, including Aurantimonas altamirensis, isolated from a cave wall in Spain. Here, we report what we believe are the first cases of the recovery of A. altamirensis from human clinical materials.
- Published
- 2008
- Full Text
- View/download PDF
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