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Nadeau M, Chabot D, Breton M, Guertin JR, Harvey Labbé L, Roberge D, Lefebvre G, Mallet M, Beaulieu S, Kavanagh É, Cloutier N, Garant P, Bélanger L, Vaillancourt S, Boumenna T, Bareil K, Savard J, Simonyan D, Ulrich Singbo MN, Berthelot S. Development of a Patient-Reported Experience Measure Tool for Ambulatory Patients With Acute Unexpected Needs: The APEX Questionnaire. J Patient Exp 2024; 11:23743735241229373. [PMID: 38618513 PMCID: PMC11010752 DOI: 10.1177/23743735241229373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024] Open
Abstract
Background: The aim of this study was to develop a patient-reported experience measure (PREM) for comparing the experience of care received by ambulatory patients with acute unexpected needs presenting in emergency departments (EDs), walk-in clinics, and primary care practices. Methods: The Ambulatory Patient EXperience (APEX) questionnaire was developed using a 5-phase mixed-methods approach. The questionnaire was pretested by asking potential users to rate its clarity, usefulness, redundancy, content and face validities, and discrimination on a 9-point scale (1 = strongly disagree to 9 = strongly agree). The pre-final version was then tested in a pilot study. Results: The final questionnaire is composed of 61 questions divided into 7 sections. In the pretest (n = 25), median responses were 8 and above for all dimensions assessed. In the pilot study, 63 participants were enrolled. Adjusted results show that access, cleanliness, and feeling treated with respect and dignity by nurses and physicians were significantly better in the clinics than in the ED. Conclusion: We developed a questionnaire to assess and compare experience of ambulatory care in different clinical settings.
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Affiliation(s)
- Myriam Nadeau
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine de famille et de médecine d’urgence, Université Laval, Québec, QC, Canada
- CHU de Québec-Université Laval, Québec, QC, Canada
| | - Dominique Chabot
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Mylaine Breton
- Département des sciences de la santé communautaire, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Jason R. Guertin
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine sociale et préventive, Université Laval, Québec, QC, Canada
| | | | | | - Gabrielle Lefebvre
- Direction de la santé publique, CIUSSS de la Capitale-Nationale, Québec, QC, Canada
| | - Myriam Mallet
- Centre de valorisation et d'exploitation de la donnée du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Sandrine Beaulieu
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Éric Kavanagh
- École de design, Université Laval, Québec, QC, Canada
| | | | | | - Lynda Bélanger
- CHU de Québec-Université Laval, Québec, QC, Canada
- École de design, Université Laval, Québec, QC, Canada
| | | | - Tarek Boumenna
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Kathryn Bareil
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - Joanie Savard
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | - David Simonyan
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
| | | | - Simon Berthelot
- Centre de recherche du CHU de Québec-Université Laval, Québec, QC, Canada
- Département de médecine de famille et de médecine d’urgence, Université Laval, Québec, QC, Canada
- CHU de Québec-Université Laval, Québec, QC, Canada
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Greenblatt M, Baillargeon D, Cote M, Nadeau M, Couture C, Hould F, Bouvet L, Tchernof A, Biertho L. A254 PREVALENCE OF HELICOBACTER PYLORI INFECTION IN BARIATRIC SURGERY PATIENTS. J Can Assoc Gastroenterol 2022. [DOI: 10.1093/jcag/gwab049.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Helicobacter Pylori (HP) infection is the most common chronic infection in humans. Known risk factors include poor socioeconomic status and living conditions, especially at a young age. In Canada, the prevalence is estimated between 23% and 38%. The relationship between BMI and HP infection is controversial. Some data suggests that HP infection occurs less frequently in individuals who are overweight. Other authors endorse that obesity is a risk factor for HP infection, possibly explained by altered innate and adaptive immunity in these patients.
Aims
The objectives were to determine the prevalence of HP infection in patients undergoing bariatric surgery and assess the correlation between HP infection and various patient characteristics.
Methods
All patients who underwent bariatric surgery with a gastric resection in a single hospital between 01/2004 and 01/2019 were analyzed. When gastritis was present, HP immunohistochemical testing was performed. Characteristics of HP-positive (HP+) and HP-negative (HP-) patients were compared using Student’s t-test and χ 2 test.
Results
A total of 6388 specimens were reviewed (4365 women & 2023 men) with a mean age of 44.9±11.2 years and a mean BMI of 49.3±8.2 kg/m2. Histology-proven HP infection rate was 6.3% (n=405). There was no significant difference in sex, BMI and body weight between HP+ and HP- patients. HP+ patients were significantly older than HP– patients (47.4±9.8 vs 44.7±11.3 years, respectively, p<0.0001). Logistic regressions identified age as a risk factor for HP infection in this population (OR 1.26, p<0.0001, CI95% 1.14–1.40 for every 10-year increase).
Conclusions
The rate of histology-proven HP infection is low in patients with severe obesity who present for bariatric surgery and is directly associated with age. The benefits of routine preoperative testing in non-gastric-bypass surgery candidates should be questioned.
Characteristics of study participants
Funding Agencies
This study was performed with support from the Research Chair in Bariatric and Metabolic Surgery at Laval University (L. Biertho and A. Tchernof). MC is the recipient of a studentship from Diabète Québec.
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Affiliation(s)
- M Greenblatt
- Gastroenterology, Queen’s University, Kingston, ON, Canada
| | - D Baillargeon
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - M Cote
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - M Nadeau
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - C Couture
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - F Hould
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - L Bouvet
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - A Tchernof
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
| | - L Biertho
- Institut universitaire de cardiologie et de pneumologie de Quebec, Quebec, QC, Canada
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Després A, Perrot N, Tastet L, Pouliot A, Shen M, Chen H, Bourgeois R, Trottier M, Guimond J, Tessier M, Nadeau M, Sebastien T, Couture P, Dweck M, Tsimikas S, Thanassoulis G, Pibarot P, Marie-Annick Clavel M, Arsenault B. Lipoprotein(A), Oxidized Phospholipids, And Aortic Valve Microcalcification Assessed By 18f-Naf Pet/Ct. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nadeau M, Boulay MÈ, Milot J, Lepage J, Bilodeau L, Maltais F, Boulet LP. Comparative prevalence of co-morbidities in smoking and non-smoking asthma patients with incomplete reversibility of airway obstruction, non-smoking asthma patients with complete reversibility of airway obstruction and COPD patients. Respir Med 2017; 125:82-88. [PMID: 28340867 DOI: 10.1016/j.rmed.2017.03.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 02/27/2017] [Accepted: 03/03/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND Asthma with incomplete reversibility of airway obstruction (IRAO) may often be associated to smoking-induced changes. Nevertheless, a high proportion of patients showing IRAO have never smoked. These patients with IRAO often share features of patients with chronic obstructive pulmonary disease (COPD). Although IRAO is still a poorly defined condition, it has been associated with a higher morbidity and mortality than asthma with complete reversibility of airway obstruction (CRAO) or even COPD alone. A high prevalence of comorbidities could contribute to the reported poorer clinical outcome in IRAO, in comparison to CRAO or COPD alone. AIM To determine the prevalence of past and current comorbidities in IRAO patients compared to patients with CRAO or COPD. METHODS This was a retrospective, cross-sectional study. Demographic data, clinical characteristics and 36 predetermined comorbidities documented from self-report and chart review, were recorded from smoking-associated IRAO (S-IRAO), non-smoking IRAO (NS-IRAO), CRAO and COPD patients. RESULTS A total of 199 patients were included in the final analysis (111F/88M, mean (±SD) age of 63 ± 10 years). The CRAO group had more comorbidities than the three other groups, but this difference was significant only with the NS-IRAO group (P = 0.04). For most comorbidities, the prevalence of comorbidities in both IRAO sub-groups was intermediate between CRAO and COPD, with significant differences between S-IRAO and NS-IRAO only for hypertension (P = 0.03), nasal polyps (P = 0.002) and pneumonia (P = 0.04). Typical asthma-associated comorbidities tended to be more prevalent in NS-IRAO patients and COPD-associated comorbidities in S-IRAO patients. CONCLUSION In this study, the prevalence of comorbidities was not superior in patients with IRAO, compared to those with CRAO or COPD alone. The prevalence of comorbidities in the two main types of IRAO patients reflects exposure to cigarette smoke and asthma-related mechanisms.
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Affiliation(s)
- Myriam Nadeau
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - Marie-Ève Boulay
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - Joanne Milot
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - Johane Lepage
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - Lara Bilodeau
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - François Maltais
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada
| | - Louis-Philippe Boulet
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, Canada.
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Nadeau M, Perreault S, Seropian S, Foss F, Isufi I, Cooper DL. The use of basiliximab-infliximab combination for the treatment of severe gastrointestinal acute GvHD. Bone Marrow Transplant 2015; 51:273-6. [PMID: 26479982 DOI: 10.1038/bmt.2015.247] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 08/13/2015] [Accepted: 09/08/2015] [Indexed: 11/09/2022]
Abstract
After allogeneic stem cell transplant, severe grade III-IV gastrointestinal (GI) acute GvHD is associated with significant morbidity and mortality, and generally results in poor outcomes. Salvage therapy for patients who fail steroid therapy is not well defined in the literature. In the current retrospective study, we reviewed our experience with the combination of basiliximab and infliximab in 21 patients with severe, grade III-IV GI acute GvHD of whom 16 met the definition for steroid-refractory disease. The overall response rate was 76%, with 43% CR at a median time of 21 days after beginning treatment. The survival at 1 year was 24%, with most deaths due to complications from GvHD and recurrence of primary disease. All five of the long-term survivors have chronic GvHD. On the basis of a review of the literature, this regimen does not seem to be significantly more effective than other strategies for severe GI GvHD and seems to be worse than the results reported for basiliximab alone. Future studies of single-agent basiliximab and newer agents are required.
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Affiliation(s)
- M Nadeau
- Department of Pharmacy Services, Smilow Cancer Hospital at Yale-New Haven Hospital, New Haven, CT, USA
| | - S Perreault
- Department of Pharmacy Services, Smilow Cancer Hospital at Yale-New Haven Hospital, New Haven, CT, USA
| | - S Seropian
- Department of Internal Medicine, Section of Hematology, Yale-New Haven Hospital, New Haven, CT, USA
| | - F Foss
- Department of Internal Medicine, Section of Hematology, Yale-New Haven Hospital, New Haven, CT, USA
| | - I Isufi
- Department of Internal Medicine, Section of Hematology, Yale-New Haven Hospital, New Haven, CT, USA
| | - D L Cooper
- Department of Internal Medicine, Section of Hematology, Yale-New Haven Hospital, New Haven, CT, USA
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Shamji M, Moon ES, Glennie R, Soroceanu A, Lin C, Bailey C, Simmonds A, Fehlings M, Dodwell E, Dold A, El-Hawary R, Hashem M, Dold A, Dold A, Jones S, Bailey C, Karadimas S, Whitehurst D, Norton J, Norton J, Manson N, Kesani A, Bednar D, Lundine K, Hartig D, Fichadi A, Fehlings M, Kim S, Harris S, Lin C, Gill J, Abraham E, Shamji M, Choi S, Goldstein C, Wang Z, McCabe M, Noonan V, Nadeau M, Ferrara S, Kelly A, Melnyk A, Arora D, Quateen A, Dea N, Ranganathan A, Zhang Y, Casha S, Rajamanickam K, Santos A, Santos A, Wilson J, Wilson J, Street J, Wilson J, Lewis R, Noonan V, Street J, El-Hawary R, Egge N, Lin C, Schouten R, Lin C, Kim A, Kwon B, Huang E, Hwang P, Allen K, Jing L, Mata B, Gabr M, Richardson W, Setton L, Karadimas S, Fehlings M, Fleming J, Bailey C, Gurr K, Bailey S, Siddiqi F, Lawendy A, Sanders D, Staudt M, Canacari E, Brown E, Robinson A, McGuire K, Chrysostoum C, Rampersaud YR, Dvorak M, Thomas K, Boyd M, Gurr K, Bailey S, Nadeau M, Fisher C, Batke J, Street J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Vaccaro A, Chapman J, Arnold P, Shaffrey C, Kopjar B, Snyder B, Wright J, Lewis S, Zeller R, El-Hawary R, Moroz P, Bacon S, Jarzem P, Hedden D, Howard J, Sturm P, Cahill P, Samdani A, Vitale M, Gabos P, Bodin N, d’Amato C, Harris C, Smith J, Parent E, Hill D, Hedden D, Moreau M, Mahood J, Lewis S, Bodrogi A, Abbas H, Goldstein S, Bronstein Y, Bacon S, Chua S, Magana S, Van Houwelingen A, Halpern E, Jhaveri S, Lewis S, Lim A, Leelapattana P, Fleming J, Siddiqqi F, Bailey S, Gurr K, Moon ES, Satkunendrarajah K, Fehlings M, Noonan V, Dvorak M, Bryan S, Aronyk K, Fox R, Nataraj A, Pugh J, Elliott R, McKeon M, Abraham E, Fleming J, Gurr K, Bailey S, Siddiqi F, Bailey C, Davis G, Rogers M, Staples M, Quan G, Batke J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Shamji M, Hurlbert R, Jacobs W, Duplessis S, Casha S, Jha N, Hewson S, Massicotte E, Kopjar B, Mortaz S, Coyte P, Rampersaud Y, Rampersaud Y, Goldstein S, Andrew B, Modi H, Magana S, Lewis S, Roffey D, Miles I, Wai E, Manson N, Eastwood D, Elliot R, McKeon M, Bains I, Yong E, Sutherland G, Hurlbert R, Rampersaud Y, Chan V, Persaud O, Koshkin A, Brull R, Hassan N, Petis S, Kowalczuk M, Petrisor B, Drew B, Bhandari M, DiPaola C, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, McLachlin S, Bailey S, Gurr K, Bailey C, Dunning C, Fehlings M, Vaccaro A, Wing P, Itshayek E, Biering-Sorensen F, Dvorak M, McLachlin S, Bailey S, Gurr K, Dunning C, Bailey C, Bradi A, Pokrupa R, Batke J, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, Street J, Kelly A, Wen T, Kingwell S, Chak J, Singh V, Cripton P, Fisher C, Dvorak M, Oxland T, Wali Z, Yen D, Alfllouse A, Alzahrani A, Jiang H, Mahood J, Kortbeek F, Fox R, Nataraj A, Street J, Boyd M, Paquette S, Kwon B, Batke J, Dvorak M, Fisher C, Reddy R, Rampersaud R, Hurlbert J, Yong W, Casha S, Zygun D, McGowan D, Bains I, Yong V, Hurlbert R, Mendis B, Chakraborty S, Nguyen T, Tsai E, Chen A, Atkins D, Noonan V, Drew B, Tsui D, Townson A, Dvorak M, Chen A, Atkins D, Noonan V, Drew B, Dvorak M, Craven C, Ford M, Ahn H, Drew B, Fehlings M, Kiss A, Vaccaro A, Harrop J, Grossman R, Frankowski R, Guest J, Dvorak M, Aarabi B, Fehlings M, Noonan V, Cheung A, Sun B, Dvorak M, Vaccaro A, Harrop J, Massicotte E, Dvorak M, Fisher C, Rampersaud R, Lewis S, Fehlings M, Marais L, Noonan V, Queyranne M, Fehlings M, Dvorak M, Atkins D, Hurlbert R, Fox R, Fourney D, Johnson M, Fehlings M, Ahn H, Ford M, Yee A, Finkelstein J, Tsai E, Bailey C, Drew B, Paquet J, Parent S, Christie S, Dvorak M, Noonan V, Cheung A, Sun B, Dvorak M, Sturm P, Cahill P, Samdani A, Vitale M, Gabos P, Bodin N, d’Amato C, Harris C, Smith J, Lange J, DiPaola C, Lapinsky A, Connolly P, Eck J, Rabin D, Zeller R, Lewis S, Lee R, Boyd M, Dvorak M, Fisher C, Kwon B, Paquette S, DiPaola C, Street J, Bodrogi A, Goldstein S, Sofia M, Lewis S, Shin J, Tung K, Ahn H, Lee R, Batke J, Ghag R, Noonan V, Dvorak M, Goyal T, Littlewood J, Bains I, Cho R, Thomas K, Swamy G. Canadian Spine Society abstracts1.1.01 Supraspinal modulation of gait abnormalities associated with noncompressive radiculopathy may be mediated by altered neurotransmitter sensitivity1.1.02 Neuroprotective effects of the sodium-glutamate blocker riluzole in the setting of experimental chronic spondylotic myelopathy1.1.03 The effect of timing to decompression in cauda equina syndrome using a rat model1.2.04 Intraoperative waste in spine surgery: incidence, cost and effectiveness of an educational program1.2.05 Looking beyond the clinical box: the health services impact of surgical adverse events1.2.06 Brace versus no brace for the treatment of thoracolumbar burst fractures without neurologic injury: a multicentre prospective randomized controlled trial1.2.07 Adverse event rates in surgically treated spine injuries without neurologic deficit1.2.08 Functional and quality of life outcomes in geriatric patients with type II odontoid fracture: 1-year results from the AOSpine North America Multi-Center Prospective GOF Study1.3.09 National US practices in pediatric spinal fusion: in-hospital complications, length of stay, mortality, costs and BMP utilization1.3.10 Current trends in the surgical treatment of adolescent idiopathic scoliosis in Canada1.3.11 Sagittal spinopelvic parameters help predict the risk of proximal junctional kyphosis for children treated with posterior distraction-based implants1.4.12 Correlations between changes in surface topography and changes in radiograph measurements from before to 6 months after surgery in adolescents with idiopathic scoliosis1.4.13 High upper instrumented vertebra (UIV) sagittal angle is associated with UIV fracture in adult deformity corrections1.4.14 Correction of adult idiopathic scoliosis using intraoperative skeletal traction1.5.01 Cauda equina: using management protocols to reduce delays in diagnosis1.5.02 Predicting the need for tracheostomy in patients with acute traumatic spinal cord injury1.5.03 A novel animal model of cervical spondylotic myelopathy: an opportunity to identify new therapeutic targets1.5.04 A review of preference-based measures of health-related quality of life in spinal cord injury research1.5.05 Predicting postoperative neuropathic pain following surgery involving nerve root manipulation based on intraoperative electromyographic activity1.5.06 Detecting positional injuries in prone spinal surgery1.5.07 Percutaneous thoracolumbar stabilization for trauma: surgical morbidity, clinical outcomes and revision surgery1.5.08 Systemic inflammatory response syndrome in spinal cord injury patients: Does its presence at admission affect patient outcomes?2.1.15 One hundred years of spine surgery — a review of the evolution of our craft and practice in the spine surgical century [presentation]2.1.16 Prevalence of preoperative MRI findings of adjacent segment disc degeneration in patients undergoing anterior cervical discectomy and fusion2.1.17 Adverse event rates of surgically treated cervical spondylopathic myelopathy2.1.18 Morphometricand dynamic changes in the cervical spine following anterior cervical discectomy and fusion and cervical disc arthroplasty2.1.19 Is surgery for cervical spondylotic myelopathy cost-effective? A cost–utility analysis based on data from the AO Spine North American Prospective Multicentre CSM Study2.2.20 Cost–utility of lumbar decompression with or without fusion for patients with symptomatic degenerative lumbar spondylolisthesis (DLS)2.2.21 Minimally invasive surgery lumbar fusion for low-grade isthmic and degenerative spondylolisthesis: 2- to 5-year follow-up2.2.22 Results and complications of posterior-only reduction and fusion for high-grade spondylolisthesis2.3.23 Fusion versus no fusion in patients with central lumbar spinal stenosis and foraminal stenosis undergoing decompression surgery: comparison of outcomes at baseline and follow-up2.3.24 Two-year results of interspinous spacers (DIAM) as an alternative to arthrodesis for lumbar degenerative disorders2.3.25 Treatment of herniated lumbar disc by sequestrectomy or conventional discectomy2.4.26 No sustained benefit of continuous epidural analgesia for minimally invasive lumbar fusion: a randomized double-blinded placebo controlled study2.4.27 Evidence and current practice in the radiologic assessment of lumbar spine fusion2.4.28 Wiltse versus midline approach for decompression and fusion of the lumbar spine2.5.09 The effect of soft tissue restraints following type II odontoid fractures in the elderly — a biomechanical study2.5.10 Development of an international spinal cord injury (SCI) spinal column injury basic data set2.5.11 Evaluation of instrumentation techniques for a unilateral facet perch and fracture using a validated soft tissue injury model2.5.12 Decreasing neurologic consequences in patients with spinal infection: the testing of a novel diagnostic guideline2.5.13 Prospective analysis of adverse events in surgical treatment of degenerative spondylolisthesis2.5.14 Load transfer characteristics between posterior fusion devices and the lumbar spine under anterior shear loading: an in vitro investigation2.5.15 Preoperative predictive clinical and radiographic factors influencing functional outcome after lumbar discectomy2.5.16 A Thoracolumbar Injury Classification and Severity Score (TLICS) of 4: What should we really do?3.1.29 Adverse events in emergent oncologic spine surgery: a prospective analysis3.1.30 En-bloc resection of primary spinal and paraspinal tumours with critical vascular involvement3.1.31 The treatment impact of minocycline on quantitative MRI in acute spinal cord injury3.1.32 Benefit of minocycline in spinal cord injury — results of a double-blind randomized placebo-controlled study3.2.33 Improvement of magnetic resonance imaging correlation with unilateral motor or sensory deficits using diffusion tensor imaging3.2.34 Comparing care delivery for acute traumatic spinal cord injury in 2 Canadian centres: How do the processes of care differ?3.2.35 Improving access to early surgery: a comparison of 2 centres3.3.36 The effects of early surgical decompression on motor recovery after traumatic spinal cord injury: results of a Canadian multicentre study3.3.37 A clinical prediction model for long-term functional outcome after traumatic spinal cord injury based on acute clinical and imaging factors3.3.38 Effect of motor score on adverse events and quality of life in patients with traumatic spinal cord injury3.4.39 The impact of facet dislocation on neurologic recovery after cervical spinal cord injury: an analysis of data on 325 patients from the Surgical Trial in Acute Spinal Cord Injury Study (STASCIS)3.4.40 Toward a more precise understanding of the epidemiology of traumatic spinal cord injury in Canada3.4.41 Access to care (ACT) for traumatic SCI: a survey of acute Canadian spine centres3.4.42 Use of the Spine Adverse Events Severity (SAVES) instrument for traumatic spinal cord injury3.5.17 Does the type of distraction-based growing system for early onset scoliosis affect postoperative sagittal alignment?3.5.18 Comparison of radiation exposure during thoracolumbar fusion using fluoroscopic guidance versus anatomic placement of pedicle screws3.5.19 Skeletal traction for intraoperative reduction in adolescent idiopathic scoliosis3.5.20 Utility of intraoperative cone-beam computed tomography (O-ARM) and stereotactic navigation in acute spinal trauma surgery3.5.21 Use of a central compression rod to reduce thoracic level spinal osteotomies3.5.22 ICD-10 coding accuracy for spinal cord injured patients3.5.23 Feasibility of patient recruitment in acute SCI trials3.5.24 Treatment of adult degenerative scoliosis with DLIF approaches. Can J Surg 2012. [DOI: 10.1503/cjs.012212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Yeste A, Nadeau M, Burns E, Weiner H, Quintana F. Suppression of Experimental Autoimmune Encephalomyelitis with Nanoparticles Carrying a Central Nervous System Antigen and a Non-Toxic Aryl Hydrocarbon Receptor Ligand (SC01.004). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.sc01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Yeste A, Nadeau M, Burns E, Weiner H, Quintana F. Suppression of Experimental Autoimmune Encephalomyelitis with Nanoparticles Carrying a Central Nervous System Antigen and a Non-Toxic Aryl Hydrocarbon Receptor Ligand (S40.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.s40.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Sarrazin J, Philippon F, Tessier M, Guimond J, Nadeau M, Molin F, Champagne J, Trottier M, Nault I, Blier L, O'Hara G. 555 18F-FDG PET/CT as a new imaging modality for diagnosis of cardiac device infections (PET-ID). Can J Cardiol 2011. [DOI: 10.1016/j.cjca.2011.07.459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Nadeau M, Best L. Recruiting American Indian women for a genetic epidemiology study. Public Health Genomics 2010; 13:389-95. [PMID: 20616521 DOI: 10.1159/000294582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2008] [Accepted: 03/02/2010] [Indexed: 11/19/2022] Open
Abstract
Due to previous negative experiences, some American Indian communities are distrustful of research in general and genetic research in particular. The Turtle Mountain Community College was awarded a National Institutes of Health (NIH) grant with 3 aims: (1) to study possible genetic influences on pre-eclampsia, (2) to encourage tribal college students to consider biomedical careers and (3) to develop the local research infrastructure. Retrospectively identified case (91) and control (188) participants were recruited into Phase I over a 3-year period and additional participants (71) were concurrently recruited from a prenatal clinic into a prospective case/control study, Phase II. This paper describes some of the challenges and solutions we encountered in the process of recruiting American Indian participants into a genetic epidemiologic study.
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Affiliation(s)
- M Nadeau
- Turtle Mountain Community College, Belcourt, ND 58367, USA
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11
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Surette ME, Nadeau M, Borgeat P, Gosselin J. Priming of human peripheral blood mononuclear cells with lipopolysaccharides for enhanced arachidonic acid release and leukotriene synthesis. J Leukoc Biol 1996; 59:709-15. [PMID: 8656056 DOI: 10.1002/jlb.59.5.709] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
In a previous study, we have shown that the ability of lipopolysaccharides (LPS) to prime isolated neutrophils for enhanced leukotriene B4 (LTB4) synthesis was dependent on the presence of plasma and involved the CD 14 antigen. In the present study, we have investigated the priming of human peripheral blood mononuclear cells (PBMC) with LPS for the subsequent release and metabolism of arachidonic acid. When PBMC were incubated with LPS for up to 2 h or when freshly isolated PBMC were stimulated with N-formyl-methionyl-leucyl-phenylalanine (fMLP) or with LPS alone, little or no synthesis of 5-lipoxygenase products nor arachidonic acid liberation were detected. However, the preincubation of PBMC with LPS for as little as 5 min primed cells for the subsequent synthesis of LTB4 upon stimulation with fMLP. Maximal priming was observed following a 15-min preincubation period and the priming effect was transient as cells preincubated with LPS for 90 min or more were no longer primed for leukotriene synthesis. Monocytes were found to be responsible for the enhanced response to fMLP since purified lymphocytes did not produce LTB4 nor LTC4 in contrast to monocyte-enriched suspensions. The priming for leukotriene synthesis coincided with an increased capacity for the release of free arachidonic acid as measured by mass spectrometry; LPS-primed cells released 8-15 times more arachidonic acid than unprimed cells within 1 min of stimulation with fMLP. Priming was observed with as little as 0.001-0.01 microg LPS/mL when cells were incubated in the presence of 10% autologous plasma. Interestingly, in the absence of plasma, priming was only observed at LPS concentrations of 0.1 microg/mL or greater. Pretreatment of cells with anti-CD14 antibodies significantly decreased the priming effect observed with 0.01 microg/mL LPS but did not affect priming with 1 microg/mL LPS. These results indicate that the priming of human PBMC with LPS for the subsequent synthesis of arachidonic acid metabolites via the 5-lipoxygenase pathway is dependent on plasma and CD14 at lower concentrations of LPS (0.001-0.01 microg/mL) but not at LPS concentrations of 0.1 microg/mL or greater.
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Affiliation(s)
- M E Surette
- Laboratory of Viral Immunology, Centre de Recherche en Rhumatologie et Immunologie, Centre de Recherche du CHUL, Québec, Canada
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Bostom AG, Shemin D, Lapane KL, Miller JW, Sutherland P, Nadeau M, Seyoum E, Hartman W, Prior R, Wilson PW. Hyperhomocysteinemia and traditional cardiovascular disease risk factors in end-stage renal disease patients on dialysis: a case-control study. Atherosclerosis 1995; 114:93-103. [PMID: 7605381 DOI: 10.1016/0021-9150(94)05470-4] [Citation(s) in RCA: 124] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Hyperhomocysteinemia occurs frequently in end-stage renal disease (ESRD), but its prevalence in comparison with traditional cardiovascular disease (CVD) risk factors is unknown. Fasting total plasma homocysteine, potential determinants of plasma homocysteine (i.e., plasma B-vitamins and serine), total and HDL cholesterol, glucose, and creatinine, were determined in 24 ESRD patients on dialysis, and 24 age, gender, and race matched Framingham Offspring Study controls with normal renal function. Presence of clinical CVD and CVD risk factors was established by standardized methods. Mean plasma homocysteine was markedly higher in the ESRD patients versus controls (22.7 vs. 9.5 mumol/l). ESRD patients were 33 times more likely than controls to have hyperhomocysteinemia (> 15.8 mumol/l) (95% confidence interval, 5.7-189.6). Hyperhomocysteinemia persisted in the ESRD patients despite normal to supernormal B-vitamin status. Plasma serine levels below the tenth percentile of the control distribution were found in 75% of the ESRD patients. Oral serine supplementation caused a 37% increase in mean plasma serine, but had no effect on plasma homocysteine in four ESRD patients with supernormal plasma folate, low plasma serine, and hyperhomocysteinemia. Given its unusually high prevalence, improved management of hyperhomocysteinemia might reduce CVD sequelae in ESRD.
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Affiliation(s)
- A G Bostom
- Framingham Heart Study, Epidemiology and Biometry Program, MA 01701, USA
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Farina PR, Graham AG, Hoffman AF, Watrous JM, Borgeat P, Nadeau M, Hansen G, Dinallo RM, Adams J, Miao CK. BIRM 270: a novel inhibitor of arachidonate release that blocks leukotriene B4 and platelet-activating factor biosynthesis in human neutrophils. J Pharmacol Exp Ther 1994; 271:1418-26. [PMID: 7996454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
(S)-N-[2-Cyclohexyl-1-(2-pyridinyl)ethyl]-5-methyl-2-benzoxazolamine+ ++ (BIRM 270) was identified as a potent and enantiomerically selective inhibitor of calcium ionophore A23187-stimulated leukotriene B4 biosynthesis in human neutrophils. The (S)- and (R)-enantiomers exhibited IC50 values of 1 nM and 40 nM, respectively. BIRM 270 did not inhibit 5-lipoxygenase activity in a cell-free assay. In addition, the compound did not interfere with the conversion of exogenous 5-lipoxygenase substrate (15S)-hydroperoxyeicosatetraenoic acid to (5S, 15S)-dihydroxyeicosatetraenoic acid in intact, ionophore-stimulated neutrophils. Under the same experimental conditions, BIRM 270 inhibited the production of 5-lipoxygenase products from endogenous substrate, suggesting that the compound affected arachidonate availability rather than metabolism. Consistent with this concept, the inhibition of leukotriene B4 biosynthesis by BIRM 270 was overcome by the addition of exogenous arachidonic acid to the leukocyte preparation. Direct measurement of free arachidonate by gas chromatography-mass spectrometry confirmed that BIRM 270 inhibited arachidonate release from ionophore-stimulated neutrophils. The compound did not affect arachidonate reacylation. The blockage of arachidonate release coincided with inhibition of leukotriene B4 biosynthesis in these cells. BIRM 270 also inhibited ionophore-stimulated platelet-activating factor biosynthesis by human neutrophils. Although these results suggest that BIRM 270 inhibited phospholipase A2-mediated deacylation of membrane phospholipids, the compound did not directly inhibit the high molecular weight, cytosolic phospholipase A2 derived from human neutrophils or U937 cells. Thus, suppression of arachidonate mobilization by BIRM 270 may be due to indirect inhibition of intracellular phospholipase A2 or to inhibition of another acylhydrolase activity.
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Affiliation(s)
- P R Farina
- Department of Inflammatory Diseases, Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT 06877
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14
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Bostom AG, Yanek L, Hume AL, Eaton CB, McQuade W, Nadeau M, Perrone G, Jacques PF, Selhub J. High dose ascorbate supplementation fails to affect plasma homocyst(e)ine levels in patients with coronary heart disease. Atherosclerosis 1994; 111:267-70. [PMID: 7718029 DOI: 10.1016/0021-9150(94)90101-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Pharmacologic doses of folate, in the absence of clinical folate deficiency, can reduce plasma levels of the putatively atherothrombotic amino acid, homocysteine (H(e)). Data suggesting that H(e) may accumulate in experimental scurvy prompted us to explore the efficacy of high dose ascorbate supplementation as a H(e)-lowering treatment, in the absence of clinical ascorbate deficiency. A randomized, placebo-controlled trial of 12 weeks of high dose (4.5 g/day) ascorbate supplementation was completed by 44 patients with established coronary heart disease. No significant change in mean fasting total plasma H(e) levels was demonstrable despite a marked increase in mean fasting plasma ascorbate levels amongst those patients randomized to active treatment. Ascorbate supplementation to prevent the development of fasting hyperhomocysteinemia may only be relevant at scorbutic levels of plasma ascorbate.
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Affiliation(s)
- A G Bostom
- Division of General Internal Medicine, Rhode Island Hospital, Providence
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Kim YI, Miller JW, da Costa KA, Nadeau M, Smith D, Selhub J, Zeisel SH, Mason JB. Severe folate deficiency causes secondary depletion of choline and phosphocholine in rat liver. J Nutr 1994; 124:2197-203. [PMID: 7965204 DOI: 10.1093/jn/124.11.2197] [Citation(s) in RCA: 119] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
It has previously been shown that choline deficiency causes depletion of hepatic folate concentration in rats. Two separate experiments were undertaken to investigate the converse phenomenon: whether folate deficiency would lead to depletion of hepatic choline. In Experiment 1, severe folate deficiency was induced in rats by feeding an amino acid-defined diet containing (per kg diet) 1.4 g choline, 0 mg folate and 10 g succinylsulfathiazole. Control rats were fed the same diet containing 8 mg folate/kg. After 4 wk, plasma and hepatic folate concentrations were significantly depleted in the severely folate-deficient rats compared with controls (P < 0.001), and hepatic choline and phosphocholine concentrations were 65 and 80% lower, respectively (P < 0.001). In Experiment 2, moderate folate deficiency was induced in rats by feeding the same diet as described above, but with the succinylsulfathiazole omitted. After 24 wk, significant systemic folate deficiency was present in the moderately folate-deficient rats compared with controls (P < 0.001). A modest reduction (36%, P = 0.087) in hepatic choline concentration was observed in the moderately folate-deficient rats compared with controls. No significant differences in hepatic phosphocholine concentrations were detected between the two groups. These results indicate that severe folate deficiency causes secondary hepatic choline deficiency in rats.
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Affiliation(s)
- Y I Kim
- U.S. Department of Agriculture Human Nutrition Research Center on Aging, Tufts University, Boston, MA 02111
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Zhao X, Nadeau M, Garwan MA, Kilius LR, Litherland AE. Observation of the negative ions: Ra-, Pa-, and Pu-. Phys Rev A 1993; 48:3980-3982. [PMID: 9910073 DOI: 10.1103/physreva.48.3980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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17
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Cravo M, Glória L, Nadeau M, Gouveia-Oliveira A, Resende M, Selhub J, Camilo M, Cardoso J, Nobre Leitão C, Costa Mira F. Homocysteinemia in chronic alcoholics: an indicator of vitamin deficiencies? Clin Nutr 1993. [DOI: 10.1016/0261-5614(93)90236-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abstract
A total of 3306 isolates of A. pleuropneumoniae originating from lung tissues of pigs that died of acute pleuropneumonia and 140 isolates recovered from tonsils or nasal cavities of apparently healthy pigs from chronically infected herds were serotyped. Various serotyping methods, such as slide agglutination, tube agglutination, ring precipitation, coagglutination, immunodiffusion, indirect hemagglutination and counterimmunoelectrophoresis either alone or in combination were used. The techniques used for serotyping continued to evolve during the last 10 years depending on the problem encountered in serotyping. Antisera prepared in rabbits against formalinized whole cell suspensions of reference strains of A. pleuropneumoniae of serotypes 1 to 12 were employed for serotyping. Serotype 1 was predominant ranging from 55 to 87% from year to year during the last 10 years with an average prevalence of 68%. Serotype 5 was second in prevalence ranging from 9 to 30% with a mean of 23%. Both subtypes of serotype 5 (5a and 5b) were present in Quebec. Serotypes 3, 6, 7, 8, 10 and 12 were isolated in small numbers together accounting for about 9%. Serotypes 4, 9 and 11 were not present. Cross-reactions were observed among isolates of serotypes 3, 6 and 8, and 1, 9 and 11 and were easily differentiated from each other by quantitation of type and group specific antigens by coagglutination and immunodiffusion tests. Serotypes 1, 5 and 7 were isolated most frequently from tonsils of pigs from chronically infected herds. Prevalence of different serotypes in different countries has also been reviewed.
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Affiliation(s)
- K R Mittal
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, University of Montreal, Que, Canada
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Thouez JP, Ekoé JM, Foggin PM, Verdy M, Nadeau M, Laroche P, Rannou A, Ghadirian P. Obesity, hypertension, hyperuricemia and diabetes mellitus among the Cree and Inuit of northern Québec. Arctic Med Res 1990; 49:180-8. [PMID: 2278597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In the last thirty years, sociocultural and political changes have profoundly affected the way of life of the Cree and Inuit of Northern Québec. Their health status profile has also changed. This study presents the main results of a health survey performed among the Cree and Inuit in 1982-1984 by a multidisciplinary team. Obesity, arterial hypertension, hyperuricemia and diabetes mellitus while almost unknown in the past, have now been added to the list of Cree and Inuit health problems. Crees have the highest risk for obesity, hypertension and diabetes mellitus. Hyperuricemia for unknown reasons seems more prevalent among the Inuit. Our findings suggest that further in-depth studies of chronic conditions in these communities are needed.
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Affiliation(s)
- J P Thouez
- Department of Geography, University of Montreal
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Brisebois LM, Charlebois R, Higgins R, Nadeau M. Prevalence of Streptococcus suis in four to eight week old clinically healthy piglets. Can J Vet Res 1990; 54:174-7. [PMID: 2306669 PMCID: PMC1255624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The study was undertaken to determine the prevalence, in the nasal cavities, of Streptococcus suis in four to eight week old clinically healthy piglets. Streptococci biochemically compatible with S. suis were isolated from 94% of piglets and 98% of farms. Of the 782 isolates submitted to serotyping, only 164 (21%) were included in the nine official serotypes. These 164 typable isolates originated from 121 (31%) of the 388 piglets and from 36 (73%) of the 49 farms included in the study. The most frequent serotypes found in piglets were, in decreasing order, 3, 4, 8 and 2. Serotype 1 was not detected in this survey. As many as 32% of piglets were found positive for two different serotypes and three different serotypes were found in 1%.
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Affiliation(s)
- L M Brisebois
- Groupe de Recherche sur les Maladies Infectieuses Porcines, Faculté de Médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebéc
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Moreau A, Higgins R, Bigras-Poulin M, Nadeau M. Rapid detection of Streptococcus suis serotype 2 in weaned pigs. Am J Vet Res 1989; 50:1667-71. [PMID: 2802297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A survey to detect Streptococcus suis serotype 2 in 1,716 weaned pigs was done in Quebec. Forty-nine sow herds were included in this survey: in 26 herds, S suis serotype 2 had been isolated during the preceding 12 months and in 23 herds (control), the organism had not been detected during a previous study. Swab specimens of the nasal cavity and tonsils of pigs were obtained for bacteriologic culture, and S suis serotype 2 was easily detected by the use of brain-heart infusion agar containing a Streptococcus-selective supplement and 5% goat antiserum raised against S suis serotype 2. After measurement of the diameter of the precipitation zone of 539 isolates, a slide agglutination test was performed to identify the S suis serotype 2 isolates. The mean precipitation zone diameter obtained for group S suis serotype 2 was larger (P less than 0.001) than that for the group designated as "others". With slide agglutination test results as reference and on the basis of discriminant analysis to stimulate detection of S suis serotype 2, 93.1% of all isolates were correctly classified, using the precipitation zone diameter as unique classification criterion. Relative specificity was 94.5% and relative sensitivity was 88.7%. Use of the precipitation zone diameter on a quantitative basis led to the proposal of a simple and reliable technique to screen swine herds for S suis serotype 2 in weaned pigs. Nasal and tonsillar swab specimens were obtained and analyzed concurrently for S suis serotype 2. The organism was found in both sites in only 20.4% of 103 carrier pigs.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A Moreau
- Groupe de Recherche sur les Maladies Infectieuses du Porc, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Qc, Canada
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Mafu AA, Higgins R, Nadeau M, Cousineau G. The Incidence of Salmonella , Campylobacter , and Yersinia enterocolitica in Swine Carcasses and the Slaughterhouse Environment. J Food Prot 1989; 52:642-645. [PMID: 31003290 DOI: 10.4315/0362-028x-52.9.642] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was done to evaluate the degree of contamination of cooler-ready hog carcasses and the slaughterhouse environment by Salmonella spp., Campylobacter spp. and Yersinia enterocolitica . Samples from diaphragms and feces were collected from 200 market hogs in a Quebec slaughterhouse. Scalding-tank water and environmental swabs were also collected in the slaughterhouse. Specimens were tested for the presence of Salmonella spp., Y. enterocolitica , and Campylobacter spp. Salmonella spp. were isolated from 45 (10%) of 448 samples. The distribution of the isolates were slaughtering floor (8.9%), feces (80.2%), cold-room floor (4.4%), and diaphragms (6.7%). Campylobacter spp. were isolated from 247 (61.7%) of 400 specimens, and C. coli , C. jejuni , and C. laridis accounted for 97%, 2%, and 1% of isolates, respectively. Ninety-nine percent of fecal samples were positive for the presence of C. coli . Y. enterocolitica was found in 42 (9.3%) of the 448 specimens. Of these, 85.7%, 11.9%, and 2.4% of the isolates came from fecal, diaphragm, and cold-room floor samples, respectively. Neither Salmonella spp. nor Y. enterocolitica were isolated from scalding-tank water.
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Affiliation(s)
- Akier A Mafu
- Département de Pathologie et Microbiologie, Facultedé Medécine Vétérinaire, Université de Montréal. C. P. 5000. Saint-Hyacinthe, Québec, Canada. J2S 7C6
| | - R Higgins
- Département de Pathologie et Microbiologie, Facultedé Medécine Vétérinaire, Université de Montréal. C. P. 5000. Saint-Hyacinthe, Québec, Canada. J2S 7C6
| | - M Nadeau
- Département de Pathologie et Microbiologie, Facultedé Medécine Vétérinaire, Université de Montréal. C. P. 5000. Saint-Hyacinthe, Québec, Canada. J2S 7C6
| | - G Cousineau
- Département de Pathologie et Microbiologie, Facultedé Medécine Vétérinaire, Université de Montréal. C. P. 5000. Saint-Hyacinthe, Québec, Canada. J2S 7C6
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Nadeau M, Vanden-Abeele J. Maximal H- and M-responses of the right and left gastrocnemius lateralis and soleus muscles. Electromyogr Clin Neurophysiol 1988; 28:307-11. [PMID: 3248553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Nadeau M, Larivière S, Higgins R, Martineau GP. Minimal inhibitory concentrations of antimicrobial agents against Actinobacillus pleuropneumoniae. Can J Vet Res 1988; 52:315-8. [PMID: 3167716 PMCID: PMC1255455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Forty-five isolates of Actinobacillus pleuropneumoniae were tested for susceptibility to 12 antimicrobial agents using a microdilution method for the minimal inhibitory concentration determinations. These results confirmed the high prevalence of A. pleuropneumoniae strains resistant to antibiotics as reported earlier using the disc diffusion method (Kirby-Bauer method). While 36% of the isolates were resistant to the penicillins, 47% were resistant to chloramphenicol and 68% were resistant to tetracycline. Minimal inhibitory concentrations for the resistant isolates were approximately 32 times higher than those for the susceptible isolates to the above antibacterial agents. The isolates were in general weakly susceptible or resistant to spectinomycin, lincomycin, tiamulin and spiramycin whereas most of them were susceptible to gentamicin, trimethoprim and erythromycin. The susceptibility pattern was similar throughout the 1980 to 1984 period. The 14 serotype 5 isolates were more resistant to tetracycline but less resistant to chloramphenicol and the penicillins than the 28 serotype 1 isolates.
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Affiliation(s)
- M Nadeau
- Groupe de recherche sur les Maladies Infectieuses Porcines, Faculté de Médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec
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Abstract
A total of 260 isolates of streptococci collected over a 9-year period from diseased pigs submitted for necropsy were studied. Seventy-seven percent of isolates were identified as S. suis and 32% of S. suis isolates were retrieved in pure culture. S. suis was found more frequently in lungs and was often isolated in conjunction with Actinobacillus pleuropneumoniae, Pasteurella multocida, Escherichia coli and other microorganisms. A total of 151 (76%) of S. suis isolates could be serotyped within the 9 recognized serotypes. Serotype 2 was the most prevalent with 33%, followed by serotypes 3, 5 and 7. All isolates were sensitive to ampicillin, penicillin, cephradine, chloramphenicol and trimethoprim-sulfamethoxazole. Resistance to streptomycin, neomycin and tetracycline appeared to be very high.
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Affiliation(s)
- F Touil
- Ecole de Médecine vétérinaire de Constantine, Algérie
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Paulin A, Lord M, Nadeau M, Lavoie J. Influence du niveau de glycogène hépatique sur le métabolisme à l'exercice: effets d'une vagotomie hépatique. Sci Sports 1987. [DOI: 10.1016/s0765-1597(87)80063-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Borgeat P, Nadeau M, Salari H, Poubelle P, Fruteau de Laclos B. Leukotrienes: biosynthesis, metabolism, and analysis. Adv Lipid Res 1985; 21:47-77. [PMID: 2992241 DOI: 10.1016/b978-0-12-024921-3.50008-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Nadeau M, Fruteau de Laclos B, Picard S, Braquet P, Corey EJ, Borgeat P. Studies on leukotriene B4 omega-oxidation in human leukocytes. Can J Biochem Cell Biol 1984; 62:1321-6. [PMID: 6099214 DOI: 10.1139/o84-168] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The kinetics of the transformation of arachidonic acid into 5-lipoxygenase products in human blood leukocytes stimulated with the ionophore A23187 (2 microM) was studied using high performance liquid chromatography. The levels of 5-hydroxyeicosatetraenoic acid (5-HETE), leukotriene B4 (LTB4), delta 6-trans-LTB4, and leukotriene C4 (LTC4) were maximum after 4-5 min of incubation; at longer incubation times, the levels of delta 6-trans-LTB4 and LTC4 remained unchanged, whereas those of 5-HETE and LTB4 decreased rapidly. The disappearance of LTB4 was concomitant with the formation of omega-hydroxy-LTB4 and omega-carboxy-LTB4. When synthetic LTB4 was added to a suspension of unstimulated human leukocytes, a similar pattern of omega-oxidation products was observed. This omega-oxidation process showed some specificity for LTB4, as indicated by the slower reaction of three stereoisomers of LTB4. Studies with subpopulations of human blood cells and human plasma clearly indicated that the polymorphonuclear leukocytes were the main source of enzymic activity for the omega-oxidation of LTB4. The liquid chromatographic behaviors of natural omega-hydroxy-LTB4 and omega-carboxy-LTB4 were studied in two systems.
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Solomon C, Tuchweber B, Srivastava U, Nadeau M. Liver lysosomal enzymes in rats during long-term dietary restriction. 1. Changes during the developmental period of life. Mech Ageing Dev 1984; 24:9-27. [PMID: 6420622 DOI: 10.1016/0047-6374(84)90173-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The specific activities of the lysosomal enzymes acid phosphatase, beta-galactosidase, arylsulphatase B and cathepsin D were determined in homogenates of livers of rats fed ad libitum and of rats subjected to long-term dietary restriction (10%, 30% and 50% of diet consumed by the ad libitum group). Dietary restriction began soon after weaning and animals were sacrificed 3, 9, 15 and 24 weeks later. Dietary restriction influenced all four enzymes but the changes depended on the enzyme as well as on the degree and duration of the dietary restriction. Total activity of acid phosphatase increased significantly at 3 weeks of restriction but only in the 50% group. The activity returned to normal values at 9 weeks. Arylsulphatase B increased in all experimental groups with a more pronounced change observed at 3 weeks and in the more severely restricted rats. No notable change in the activities of beta-galactosidase and cathepsin D activities was observed. Changes in the liver ultrastructure paralleled the biochemical changes seen at 3 weeks. Numerous autophagic vacuoles and dense bodies resembling age pigments were formed in the hepatocytic cytoplasm. Mitochondrial enlargement, increased matrical density and rough endoplasmic reticulum fragmentation were also noted. Few of these changes were observed at 9 weeks, and the hepatocyte's morphology was virtually normal at 15 and 24 weeks. The marked changes seen at 3 weeks may be a manifestation of the body's adaptive processes to the nutritional stress.
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Nadeau M, Brassard A, Deshaies P. A new EMG method of recording H reflexes for clinical and kinesiological studies. Electromyogr Clin Neurophysiol 1983; 23:361-9. [PMID: 6884266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Brault-Dubuc M, Nadeau M, Dickie J. Iron status of French-Canadian children: a three year follow-up study. Hum Nutr Appl Nutr 1983; 37 A:210-21. [PMID: 6874411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Dietary iron intake and hematocrit, hemoglobin, serum iron, transferrin saturation and serum ferritin were studied longitudinally in 425 French-Canadian children from upper-middle class families at 3, 6, 9, 12, 15, 18, 24 and 36 months. At 3 to 9 months, the median iron intake exceeded the amount recommended (7 mg/d), at 12 to 36 months it was close to the amount recommended (8 mg). The proportion of anaemic children as diagnosed by low hematocrit and hemoglobin values did not exceed 5 percent except at three months of age. Transferrin saturation lower than 16 percent was detected in 12 percent of the children aged 12-18 months and 8 percent of those aged 24-36 months. Serum ferritin increased from 18 to 36 months of age; between 18 months and 3 years, the proportion of children with deficient serum ferritin (SF less than 10 ng/ml) and low iron reserves (SF 10-20 ng/ml) declined respectively from 29 to 2 percent and 55 to 26 percent. Thus, as the children grew older the iron intake still permitted the improvement of hematologic parameters of iron status in most subjects. The progressive increase of hematological values with age emphasizes the need for more specific standards for children of various ages.
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Nadeau M, Brassard A, Cuerrier JP. The bicycle ergometer for muscle power testing. Can J Appl Sport Sci 1983; 8:41-6. [PMID: 6850976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The force-velocity relationship implies that the faster a contracting muscle is permitted to shorten, the weaker it becomes or the slower a contracting muscle is permitted to shorten, the stronger it becomes until it reaches maximal isometric tension. The relationship is hyperbolic for a denervated muscle but is inverse and linear for functionally innervated muscle groups. When the force of contraction is multiplied by the velocity of contraction, a power production curve is obtained. The purposes of the study were to examine the force-velocity relationship on a standard bicycle ergometer, to deduce a power-velocity curve, to compare the results of young men and women and to see if the measures were reproducible. Fifty-eight young men and women volunteered for the study. Testing consisted of pedalling as quickly as possible for five seconds at resistance settings from 2 to 7-kg. In order to evaluate the reproducibility of the scores, retesting was done one hour later. It was shown that the relationship between the resistance settings and the number of revolutions completed by the male and female subjects was inverse and linear. The higher the resistance setting was, the larger was the difference in the scores of the young men and women. When a power curve was derived for each group, a peak power was only identified in the female subjects and this was encountered at a 5-kg resistance setting. The scores obtained at a resistance setting of 5 and 7 kg for female and male subjects respectively showed the best reproducibility. The bicycle ergometer may not be used as an alternative but as a complementary tool to an isokinetic dynamometer.
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Labrecque S, Grondin S, Nadeau M. The force-velocity curve on a Nautilus machine. Am Correct Ther J 1983; 37:53-5. [PMID: 6869158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Srivastava U, Nadeau M, Carbonneau N. Zinc content of meals served in the cafeteria of the Université de Montréal. Can J Public Health 1978; 69:469-74. [PMID: 743683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Lavau M, Nadeau M, Susini C. [In vitro metabolism of rat epididymal adipose tissue in a nutritional obesity state. II. Incubation with labeled glucose. Effects of insulin]. Biochimie 1972; 54:1057-67. [PMID: 4676062 DOI: 10.1016/s0300-9084(72)80057-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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