498 results on '"Peyron F"'
Search Results
152. Chloroquine-induced inhibition of the production of TNF, but not of IL-6, is affected by disruption of iron metabolism
- Author
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Stephane Picot, Peyron F, Donadille A, Jp, Vuillez, Barbe G, and Ambroise-Thomas P
- Subjects
Antimalarials ,Dose-Response Relationship, Drug ,Interleukin-6 ,Tumor Necrosis Factor-alpha ,Iron ,Macrophages ,Malaria, Cerebral ,Homeostasis ,Humans ,Chloroquine ,Research Article - Abstract
There is now considerable evidence that cerebral malaria may be related to the over-production of tumour necrosis factor (TNF). Nevertheless, our knowledge is very poor concerning the biological events which lead up to this TNF over-production. Furthermore, interleukin-6 (IL-6) is produced in large amounts during malaria infection and seems to have inhibitory action on TNF production. Anti-malarial drugs were investigated for their ability to interfere with TNF and IL-6 secretion by human non-immune macrophages stimulated by lipopolysaccharides (LPS) or Plasmodium falciparum culture supernatant. Macrophages were pretreated with chloroquine, quinine, proguanil, mefloquine or halofantrine before stimulation. TNF and IL-6 production were suppressed in a dose-dependent manner when macrophages were treated with chloroquine, but not with other anti-malarial drugs. Considering that chloroquine probably acts via lysosomotropic mechanisms, and that iron metabolism may interfere with the non-specific immune response, we focused our attention on these biochemical events in order to investigate the mechanisms by which chloroquine inhibits cytokine production. Our results demonstrated that chloroquine-induced inhibition of TNF and IL-6 production is not mediated through a lysosomotropic mechanism, and that chloroquine probably acts on TNF secretion by disrupting iron homeostasis. Inhibition of IL-6 production seems not to be mediated through these pathways. These observations suggest that chloroquine may help to prevent cerebral malaria whatever the drug sensitivity of the parasite strain, and may provide new tools for an anti-disease therapy regardless of the emergence of parasite multi-drug resistance.
153. Plasmodium falciparumgrowth inhibition by human plateletsin vitro
- Author
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Peyron, F., primary, Polack, B., additional, Lamotte, D., additional, Kolodie, L., additional, and Ambroise-Thomas, P., additional
- Published
- 1989
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154. Formulation of malaria treatment policy for children in Côte d'Ivoire as chloroquine resistantPlasmodium falciparumspreads into West Africa
- Author
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Soro, B., primary, Davis, C. E., additional, Peyron, F. M., additional, Yao, F., additional, Saki, Z. M., additional, Nguyen-Dinh, P., additional, and Breman, J. G., additional
- Published
- 1989
- Full Text
- View/download PDF
155. Doxycycline-induced photo-onycholysis.
- Author
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Rabar D, Combemale P, Peyron F, Rabar, Didier, Combemale, Patrick, and Peyron, François
- Published
- 2004
156. Kinetics of the catalytic dehydration of 2-propanol
- Author
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de Mourgues, L., Peyron, F., Trambouze, Y., and Prettre, M.
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- 1967
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157. TNF levels in severe malaria treated by exchange transfusion.
- Author
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Salord, F., Peyron, F, Vuillez, J P, and Gaussorgues, P
- Published
- 1991
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158. Mother-to-child transmission of toxoplasmosis: risk estimates for clinical counselling.
- Author
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Dunn D, Wallon M, Peyron F, Petersen E, Peckham C, and Gilbert R
- Published
- 1999
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159. Toxoplasma gondii: Comparison of human CD34+ and monocyte-derived dendritic cells after parasite infection
- Author
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Persat, F., Diana, J., Benadiba, C., Ferrandiz, J., Péguet-Navarro, J., Peyron, F., Picot, S., Schmitt, D., and Vincent, C.
- Subjects
- *
DENDRITIC cells , *LYMPHOID tissue , *TOXOPLASMA gondii , *CELL membranes - Abstract
Abstract: Human dendritic cells (DC) obtained in vitro from CD34+ progenitors (CD34-DC) or blood monocytes (mo-DC) are different DC which may be used in a model of T. gondii infection. We compared the survival, infection rate and cell surface receptor expression of both DC types after living T. gondii tachyzoite infection. CD34-DC appeared less resistant to the parasite than mo-DC. At 48h post-infection, chemokine receptors responsible for DC homing and migration were absent in mo-DC, while down regulation of CCR6 and up regulation of CCR7 was observed in CD34-DC. This result, suggesting migration ability of CD34-DC, was confirmed by in vitro migration experiments against different chemokines. Tachyzoite supernatant, used as chemokine, attracted immature CD34-DC as observed by MIP3α, while MIP3β, as expected, attracted mature CD34-DC. Under similar conditions, no significant difference was noticed between mature or immature mo-DC. These data indicated that CD34-DC represent an alternative model that allows migration assay of infected DC by T. gondii. [Copyright &y& Elsevier]
- Published
- 2007
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- View/download PDF
160. Real-time PCR for detection of molecular markers of resistance in Plasmodium falciparum
- Author
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de Monbrison, F., Raynaud, D., Latour-Fondanaiche, C., Angei, C., Kaiser, K., Peyron, F., and Picot, S.
- Subjects
- *
PLASMODIUM falciparum , *MALARIA treatment , *DRUG resistance - Abstract
Plasmodium falciparum drug resistance is a major problem in malaria endemic areas. Molecular markers and in vitro tests have been developed to study and monitor drug resistance. However, none used alone, can provide sufficient data concerning the level of drug resistance and to issue precise guideline for drug use policies in endemic areas. We propose real-time PCR for the simultaneous detection of pfcrt and pfmdr1 genes mutations. The aim of this study was not to provide definitive data concerning the rate of mutations in an endemic area, but to describe a powerful method allowing the detection of major pfmdr1 and pfcrt mutations. [Copyright &y& Elsevier]
- Published
- 2003
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161. Inter-subject variability in biological fluid drug levels during long-term malaria prophylaxis with chloroquine/proguanil
- Author
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Chaulet, J.F., Flechaire, A., Delolme, H., Fever, G., Brazier, J.L., and Peyron, F.
- Published
- 1994
- Full Text
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162. Identification of human IgG autoantibodies specific for IL-10.
- Author
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Menetrier-Caux, C., Briere, F., Jouvenne, P., Peyron, E., Peyron, F., and Banchereau, J.
- Subjects
- *
AUTOANTIBODIES , *IMMUNOGLOBULINS , *INTERLEUKIN-10 , *ENEMIES , *SEPHAROSE , *PROTEIN binding - Abstract
Since autoantibodies to IL-1α, interferon-alpha (IFN-α) and IL-6 have been described, this study concentrated on the search for autoantibodies to hIL-10 using an assay based on the precipitation of 125I-hIL-10 anti-IL-10 autoantibody complexes using Protein G-Sepharose. Among 1860 tested sera, only seven were found to specifically precipitate IL-10, thus indicating the rare occurrence of such autoantibodies. Four of those seven anti-IL-10 autoantibody sera were specific for hIL-10, two recognized both human and viral IL-10, while the last one recognized human, viral and murine IL-10, thus suggesting the existence of at least three different epitopic specificities. The purification of anti-IL-10 autoantibody from one serum demonstrated the existence of a single (IgG1, λ) autoantibody that neutralized IL-10 biological activity. Thus, autoantibodies to IL-10 may represent natural antagonists to IL-10. [ABSTRACT FROM AUTHOR]
- Published
- 1996
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- View/download PDF
163. Evaluation of an immunochromatographic assay: Giardia-Strip® (Coris BioConcept) for detection of Giardia intestinalis in human fecal specimens.
- Author
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Nguyen, T., Kherouf, H., Blanc-Pattin, V., Allais, E., Chevalier, Y., Richez, A., Ramade, C., and Peyron, F.
- Subjects
- *
LETTERS to the editor , *GIARDIA lamblia , *CHROMATOGRAPHIC detectors - Abstract
A letter to the editor is presented in response to the article regarding the use of an immunochromatographic assay for detecting Giardia intestinalis in human fecal samples.
- Published
- 2012
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164. Comparative diagnostic performance of two commercial rapid tests for malaria in a non-endemic area.
- Author
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De Monbrison, F., Gérome, P., Chaulet, J. F., Wallon, M., Picot, S., and Peyron, F.
- Subjects
- *
FEVER , *MALARIA , *PROTOZOAN diseases , *AVIAN malaria , *BLACKWATER fever , *RAPID methods (Microbiology) - Abstract
In the study reported here, the diagnostic performance of two new rapid tests for the diagnosis of malaria was evaluated in symptomatic patients in a non-endemic area. Of 557 consecutive patients, 109 (19.6%) had documented malaria. For the NOW ICT MALARIA P.f./P.v. (Binax, Portland, ME, USA) and OptiMAL IT (Diamed, Cressier, Switzerland) tests, respectively, sensitivity values were 96.3% and 79.8% (P-value, 0.0001), and specificity values were 98.8% and 98.4%. The NOW ICT test did not detect two of 80Plasmodium falciparuminfections, and it generated false-positive results for five patients. The OptiMAL IT test failed to detect ten of theP. falciparuminfections, and it generated seven false-positive results. The results suggest that these rapid diagnostic tests for malaria may be useful, but they cannot replace microscopic examination of blood films. [ABSTRACT FROM AUTHOR]
- Published
- 2004
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165. Genetic and epigenetic factors at COL2A1 and ABCA4 influence clinical outcome in congenital toxoplasmosis
- Author
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Ruth Gilbert, Aubrey Hargrave, Christopher S. Peacock, Rima McLeod, Jenefer M. Blackwell, Ernest Mui, E. Nancy Miller, Michael J. Kirisits, Hooi Kuan Tan, Marie-Hélène Bessières, Lee-Anne de Roubaix, Paul Meier, Jacqueline Franck, Heather J. Cordell, Dorota Nowakowska, Eskild Petersen, Sarra E. Jamieson, François Peyron, Andrea-Romana Prusa, Philippe Thulliez, Kenneth M. Boyer, Jessica J. Coyne, Mario Cortina-Borja, Babill Stray-Pedersen, François Kieffer, Martine Wallon, Nicole Ferret, Wilma Buffolano, Małgorzata Paul, Jamieson, Se, de Roubaix, La, Cortina Borja, M, Tan, Hk, Mui, Ej, Cordell, Hj, Kirisits, Mj, Miller, En, Peacock, C, Hargrave, Ac, Coyne, Jj, Boyer, K, Bessieres, Mh, Buffolano, Wilma, Ferret, N, Franck, J, Kieffer, F, Meier, P, Nowakowska, De, Paul, M, Peyron, F, Stray Pedersen, B, Prusa, Ar, Thulliez, P, Wallon, M, Petersen, E, Mcleod, R, Gilbert, Re, and Blackwell, J. M.
- Subjects
Infectious Diseases/Epidemiology and Control of Infectious Diseases ,Genotype ,Public Health and Epidemiology/Infectious Diseases ,ABCA4 ,lcsh:Medicine ,Disease ,Eye ,Bioinformatics ,Linkage Disequilibrium ,Toxoplasmosis, Congenital ,Epigenesis, Genetic ,Cohort Studies ,Genomic Imprinting ,Ophthalmology/Eye Infections ,Genetics and Genomics/Epigenetics ,medicine ,Genetic predisposition ,Humans ,Allele ,lcsh:Science ,Collagen Type II ,Genetics and Genomics/Genetics of Disease ,Genetics and Genomics/Medical Genetics ,Pregnancy ,Multidisciplinary ,biology ,business.industry ,lcsh:R ,Infectious Diseases/Protozoal Infections ,Brain ,Toxoplasma gondii ,medicine.disease ,biology.organism_classification ,Pathology/Molecular Pathology ,Toxoplasmosis ,Ophthalmology/Inherited Eye Disorders ,Treatment Outcome ,biology.protein ,ATP-Binding Cassette Transporters ,lcsh:Q ,business ,Research Article - Abstract
Udgivelsesdato: 2008-null BACKGROUND: Primary Toxoplasma gondii infection during pregnancy can be transmitted to the fetus. At birth, infected infants may have intracranial calcification, hydrocephalus, and retinochoroiditis, and new ocular lesions can occur at any age after birth. Not all children who acquire infection in utero develop these clinical signs of disease. Whilst severity of disease is influenced by trimester in which infection is acquired by the mother, other factors including genetic predisposition may contribute. METHODS AND FINDINGS: In 457 mother-child pairs from Europe, and 149 child/parent trios from North America, we show that ocular and brain disease in congenital toxoplasmosis associate with polymorphisms in ABCA4 encoding ATP-binding cassette transporter, subfamily A, member 4. Polymorphisms at COL2A1 encoding type II collagen associate only with ocular disease. Both loci showed unusual inheritance patterns for the disease allele when comparing outcomes in heterozygous affected children with outcomes in affected children of heterozygous mothers. Modeling suggested either an effect of mother's genotype, or parent-of-origin effects. Experimental studies showed that both ABCA4 and COL2A1 show isoform-specific epigenetic modifications consistent with imprinting. CONCLUSIONS: These associations between clinical outcomes of congenital toxoplasmosis and polymorphisms at ABCA4 and COL2A1 provide novel insight into the molecular pathways that can be affected by congenital infection with this parasite.
- Published
- 2008
166. Novel paradigm enables accurate monthly gestational screening to prevent congenital toxoplasmosis and more.
- Author
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Zhou Y, Leahy K, Grose A, Lykins J, Siddiqui M, Leong N, Goodall P, Withers S, Ashi K, Schrantz S, Tesic V, Abeleda AP, Beavis K, Clouser F, Ismail M, Christmas M, Piarroux R, Limonne D, Chapey E, Abraham S, Baird I, Thibodeau J, Boyer KM, Torres E, Conrey S, Wang K, Staat MA, Back N, L'Ollivier C, Mahinc C, Flori P, Gomez-Marin J, Peyron F, Houzé S, Wallon M, and McLeod R
- Subjects
- Female, Humans, Infant, Newborn, Pregnancy, Antibodies, Protozoan blood, False Positive Reactions, Immunoglobulin M blood, Prenatal Diagnosis methods, Sensitivity and Specificity, Toxoplasma immunology, Toxoplasmosis, Congenital diagnosis, Toxoplasmosis, Congenital prevention & control
- Abstract
Background: Congenital toxoplasmosis is a treatable, preventable disease, but untreated causes death, prematurity, loss of sight, cognition and motor function, and substantial costs worldwide., Objectives: We asked whether high performance of an Immunochromatographic-test (ICT) could enable accurate, rapid diagnosis/treatment, establishing new, improved care-paradigms at point-of-care and clinical laboratory., Methods: Data were obtained in 12 studies/analyses addressing: 1-feasibility/efficacy; 2-false-positives; 3-acceptability; 4-pink/black-line/all studies; 5-time/cost; 6-Quick-Information/Limit-of-detection; 7, 8-acute;-chronic; 9-epidemiology; 10-ADBio; 11,12-Commentary/Cases/Chronology., Findings: ICT was compared with gold-standard or predicate-tests. Overall, ICT performance for 1093 blood/4967 sera was 99.2%/97.5% sensitive and 99.0%/99.7% specific. However, in clinical trial, FDA-cleared-predicate tests initially caused practical, costly problems due to false-positive-IgM results. For 58 persons, 3/43 seronegative and 2/15 chronically infected persons had false positive IgM predicate tests. This caused substantial anxiety, concerns, and required costly, delayed confirmation in reference centers. Absence of false positive ICT results contributes to solutions: Lyon and Paris France and USA Reference laboratories frequently receive sera with erroneously positive local laboratory IgM results impeding patient care. Therefore, thirty-two such sera referred to Lyon's Reference laboratory were ICT-tested. We collated these with other earlier/ongoing results: 132 of 137 USA or French persons had false-positive local laboratory IgM results identified correctly as negative by ICT. Five false positive ICT results in Tunisia and Marseille, France, emphasize need to confirm positive ICT results with Sabin-Feldman-Dye-test or western blot. Separate studies demonstrated high performance in detecting acute infections, meeting FDA, CLIA, WHO REASSURED, CEMark criteria and patient and physician satisfaction with monthly-gestational-ICT-screening., Conclusions/significance: This novel paradigm using ICT identifies likely false positives or raises suspicion that a result is truly positive, rapidly needing prompt follow up and treatment. Thus, ICT enables well-accepted gestational screening programs that facilitate rapid treatment saving lives, sight, cognition and motor function. This reduces anxiety, delays, work, and cost at point-of-care and clinical laboratories., Trial Registration: NCT04474132, https://clinicaltrials.gov/study/NCT04474132 ClinicalTrials.gov., Competing Interests: We have read the journal’s policy and the authors of this manuscript have the following competing interests: DL and RP are/were affiliated with LDBIO Diagnostics, DL is the scientist and CEO share holder and RP was the R&D Director Scientist until January 13, 2023. A patent application was submitted by DL with the scientists at the University of Chicago and in Lyon, France in August 2018. This application is pending review in the United States in accordance with US Bayh Dole Laws. This is for the development of the whole blood point of care test and the practical clinical utility of the ICT to guide treatment for gestational infection to prevent congenital toxoplasmosis. This is to insure its continued high-quality performance and reproducibility of the results described herein. It is pending in review at the US patent office. All other authors have declared no conflict of interest., (Copyright: © 2024 Zhou et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
- Published
- 2024
- Full Text
- View/download PDF
167. [Overview of hospital city repay for paediatric preparations initiated within the Marseille Public University Hospital system].
- Author
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Bouguergour C, Peyron F, Curti C, Baillié N, and Gallice S
- Subjects
- Child, Humans, Hospitals, University, Pharmaceutical Preparations, Prescriptions, Medication Errors, Outpatients
- Abstract
Objectives: Hospital internal-use pharmacies are required to make pharmaceutical preparations in order to obtain a medication in a dosage and/or Galenic form (FG) suitable for pediatric use. The aim of this study is to assess the procedures for continuing pharmaceutical preparations initiated within the Assistance Publique des Hôpitaux de Marseille in an outpatient setting., Methods: Hospital discharge prescriptions and/or consultation prescriptions involving paediatric magistral preparations and issued by our Hospital Centre were collected from two pharmacies with significant preparation activity at national level. An analysis of regulatory compliance was carried out, as well as a comparison of the formulation of preparations made in the outpatient setting and in the hospital., Results: Au total, 45 prescriptions were collected, representing 52 preparation lines. The regulatory analysis revealed that all the prescriptions contained at least one non-conformity, 60.8% of which related to drug treatments. The prepared FG differed in the outpatient setting compared to the hospital in 46.2% of cases, and in 56% of cases, the vehicle and concentration of the active ingredient used differed when the FG was a liquid oral form., Conclusions: The lack of clear and complete hospital prescriptions makes it difficult to carry out treatment initiated in hospital in the outpatient setting. The multiplicity of information systems between hospitals and outpatient settings are obstacles to the interoperability needed to coordinate patient treatment, particularly in paediatrics. The quality of discharge prescriptions needs to be improved to optimise the patient care pathway., (Copyright © 2024 Académie Nationale de Pharmacie. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2024
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168. Long-term Ocular Outcomes in Congenital Toxoplasmosis Treated Perinatally.
- Author
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Journé A, Garweg J, Ksiazek E, Peyron F, Binquet C, and Wallon M
- Subjects
- Child, Infant, Newborn, Pregnancy, Female, Humans, Child, Preschool, Prognosis, Prenatal Diagnosis, Toxoplasmosis, Congenital diagnosis, Toxoplasmosis, Congenital drug therapy, Toxoplasmosis, Congenital epidemiology, Toxoplasmosis, Ocular diagnosis, Toxoplasmosis, Ocular drug therapy, Toxoplasmosis, Ocular epidemiology, Chorioretinitis diagnosis, Chorioretinitis epidemiology, Chorioretinitis complications
- Abstract
Background: Congenital toxoplasmosis (CT) can be accompanied by serious organ manifestations, particularly retinochoroiditis, and may occur throughout life. We aimed to monitor long-term ocular prognosis in a large French cohort of patients with CT and its changes over time in the context of mandatory prenatal screening (since 1992) and incidence decrease since 2008., Methods: Patients with CT diagnosed between 1987 and 2021 were prospectively included and followed for up to 35 years. The effect of the period of conception on the risk of first retinochoroiditis has been tested using a flexible extension of the Cox model. Incidence rates of retinochoroiditis were estimated., Results: A total of 646 infected live born children were followed for a median of 12 years (range, 0.5-35); 187 patients (29%) had at least 1 ocular lesion (first at a median age of 5 years; range, 0-26 years) with peaks at 7 and 12 years. Early maternal infection and the presence of nonocular signs at birth were associated with a higher risk of retinochoroiditis, whereas delayed diagnosis of CT (after birth versus before or at birth) was associated with a lower risk (13% decrease for each additional month after birth; P = .01). A period effect for the risk of developing retinochoroiditis in patients born after 2008 was not detected., Conclusions: Despite prenatal screening and prolonged perinatal treatment, retinochoroiditis is not a rare event in French patients with CT and can occur well into adulthood, with peak incidences at 7 and 12 years of age. It rarely causes severe damage but warrants regular follow-up into adulthood., (Copyright © 2024 by the American Academy of Pediatrics.)
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- 2024
- Full Text
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169. [Temporary circulatory assistance by Impella™ in interventional cardiology: Observational study and medico-economic assessment after four years of use].
- Author
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Bouillot E, Cherpin A, Remacle Bonnet A, Bonello L, and Peyron F
- Subjects
- Humans, Retrospective Studies, Cost-Benefit Analysis, Treatment Outcome, Shock, Cardiogenic therapy, Cardiology
- Abstract
Objectives: During life-threatening emergencies or risky cardiologic interventions, pharmacology can be limited and the use of appropriate medical devices is then necessary. The Impella™ catheter, CP and 2.5, has been referenced for the exclusive use of the interventional cardiology technical platform at Hôpital Nord (AP-HM) in the absence of rapid access to the Extracorporeal Circulation unit. It is a temporary mechanical circulatory support device mainly indicated in refractory cardiogenic shock and coronary angioplasty at high risk of hemodynamic instability. The objective of this study, observational and retrospective, is to carry out a clinical and economic assessment linked to the use of this device over a period of four years (2017-2020)., Methods: The criteria relating to the 71 patients (51 Impella™ CP and 20 Impella™ 2.5) and their clinical evolution as well as the costs and valuation of the stays were determined., Results: In particular, the Impella™ CP enabled myocardial recovery in 18 out of 51 patients and it was an intermediary in the context of heavier care for 11 patients. The balance between expenditure and valuation shows a deficit of -819,937 euros over the study period, with however a probable margin for improvement., Conclusions: The Impella™ is of clinical interest under very specific conditions. Its high cost and the absence of inclusion on the list of reimbursements in addition to Homogeneous Groups of Stays represent a significant financial burden for health care establishments. Thus, optimizing the rating of future stays is a necessity., (Copyright © 2023 Académie Nationale de Pharmacie. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
170. [Causality analysis of a low-viscosity bone cement in orthopaedic surgery following serious adverse events].
- Author
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Cherpin A, Poirier M, Mattei JC, Lassale B, and Peyron F
- Abstract
Objectives: Low-viscosity bone cement impregnated with gentamicin is frequently used to fix femoral prostheses. Three cardiac arrests occured successively during cementoplasty oh hip replacements, leading to the death of two patients. The objective of this study is to describe the actions undertaken to establish a potential link between the use of the bone cement and the occurrence of these serious adverse events (SAE)., Methods: A mortality and morbidity review was organised in order to study the causality of bone cement and to propose improvement actions, following 3 considered SAE associated to materiovigilance reporting., Results: All three SAE occurred following the injection of the same reference of bone cement. The incriminated batches were rapidly placed in quarantine. Analysis by the manufacturer revealed no defects in production quality requirements but suggested the possibility of Bone Cement Implantation Syndrome (BCIS). A literary review on BCIS confirmed that this rare intraoperative complication was plausible in all three cases. Management of these SAE via a health care safety process enabled to provide a rapid answer concerning the causality of the cement and practice deviations of its use., Conclusions: Systemic analysis completed by the manufacturer's analysis provided corrective actions for professional practices. Implementation and efficacy of these actions will be monitored as part of the facility's programme for the improvement of quality and patient safety., (Copyright © 2023 Académie Nationale de Pharmacie. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2023
- Full Text
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171. Refractory Pseudomonas aeruginosa Bronchopulmonary Infection After Lung Transplantation for Common Variable Immunodeficiency Despite Maximal Treatment Including IgM/IgA-Enriched Immunoglobulins and Bacteriophage Therapy.
- Author
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Levêque M, Cassir N, Mathias F, Fevre C, Daviet F, Bermudez J, Brioude G, Peyron F, Reynaud-Gaubert M, and Coiffard B
- Abstract
Recipients transplanted for bronchiectasis in the context of a primary immune deficiency, such as common variable immunodeficiency, are at a high risk of severe infection in post-transplantation leading to poorer long-term outcomes than other transplant indications. In this report, we present a fatal case due to chronic Pseudomonas aeruginosa bronchopulmonary infection in a lung transplant recipient with common variable immunodeficiency despite successful eradication of an extensively drug-resistant (XDR) strain with IgM/IgA-enriched immunoglobulins and bacteriophage therapy. The fatal evolution despite a drastic adaptation of the immunosuppressive regimen and the maximal antibiotic therapy strategy raises the question of the contraindication of lung transplantation in such a context of primary immunodeficiency., Competing Interests: Dr Cindy Fevre reports personal fees from Pherecydes Pharma, outside the submitted work. The authors report no other conflicts of interest in this work., (© 2023 Levêque et al.)
- Published
- 2023
- Full Text
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172. Novel paradigm enables accurate monthly gestational screening to prevent congenital toxoplasmosis and more.
- Author
-
Zhou Y, Leahy K, Grose A, Lykins J, Siddiqui M, Leong N, Goodall P, Withers S, Ashi K, Schrantz S, Tesic V, Abeleda AP, Beavis K, Clouser F, Ismail M, Christmas M, Piarroux R, Limonne D, Chapey E, Abraham S, Baird I, Thibodeau J, Boyer K, Torres E, Conrey S, Wang K, Staat MA, Back N, Gomez Marin J, Peyron F, Houze S, Wallon M, and McLeod R
- Abstract
Background: Congenital toxoplasmosis is a treatable, preventable disease, but untreated causes death, prematurity, loss of sight, cognition and motor function, and substantial costs worldwide., Methods/findings: In our ongoing USA feasibility/efficacy clinical trial, data collated with other ongoing and earlier published results proved high performance of an Immunochromatographic-test(ICT) that enables accurate, rapid diagnosis/treatment, establishing new paradigms for care. Overall results from patient blood and/or serum samples tested with ICT compared with gold-standard-predicate-test results found ICT performance for 4606 sera/1876 blood, 99.3%/97.5% sensitive and 98.9%/99.7% specific. However, in the clinical trial the FDA-cleared-predicate test initially caused practical, costly problems due to false-positive-IgM results. For 58 persons, 3/43 seronegative and 2/15 chronically infected persons had false positive IgM predicate tests. This caused substantial anxiety, concerns, and required costly, delayed confirmation in reference centers. Absence of false positive ICT results contributes to solutions: Lyon and Paris France and USA Reference laboratories frequently receive sera with erroneously positive local laboratory IgM results impeding patient care. Therefore, thirty-two such sera referred to Lyon's Reference laboratory were ICT-tested. We collated these with other earlier/ongoing results: 132 of 137 USA or French persons had false positive local laboratory IgM results identified correctly as negative by ICT. Five false positive ICT results in Tunisia and Marseille, France, emphasize need to confirm positive ICT results with Sabin-Feldman-Dye-test or western blot. Separate studies demonstrated high performance in detecting acute infections, meeting FDA, CLIA, WHO ASSURED, CEMark criteria and patient and physician satisfaction with monthly-gestational-ICT-screening., Conclusions/significance: This novel paradigm using ICT identifies likely false positives or raises suspicion that a result is truly positive, rapidly needing prompt follow up and treatment. Thus, ICT enables well-accepted gestational screening programs that facilitate rapid treatment saving lives, sight, cognition and motor function. This reduces anxiety, delays, work, and cost at point-of-care and clinical laboratories., Author’s Summary: Toxoplasmosis is a major health burden for developed and developing countries, causing damage to eyes and brain, loss of life and substantial societal costs. Prompt diagnosis in gestational screening programs enables treatment, thereby relieving suffering, and leading to > 14-fold cost savings for care. Herein, we demonstrate that using an ICT that meets WHO ASSURED-criteria identifying persons with/without antibody to Toxoplasma gondii in sera and whole blood with high sensitivity and specificity, is feasible to use in USA clinical practice. We find this new approach can help to obviate the problem of detection of false positive anti- T.gondii IgM results for those without IgG antibodies to T.gondii when this occurs in present, standard of care, predicate USA FDA cleared available assays. Thus, this accurate test facilitates gestational screening programs and a global initiative to diagnose and thereby prevent and treat T.gondii infection. This minimizes likelihood of false positives (IgG and/or IgM) while maintaining maximum sensitivity. When isolated IgM antibodies are detected, it is necessary to confirm and when indicated continue follow up testing in ∼2 weeks to establish seroconversion. Presence of a positive ICT makes it likely that IgM is truly positive and a negative ICT makes it likely that IgM will be a false positive without infection. These results create a new, enthusiastically-accepted, precise paradigm for rapid diagnosis and validation of results with a second-line test. This helps eliminate alarm and anxiety about false-positive results, while expediting needed treatment for true positive results and providing back up distinguishing false positive tests.
- Published
- 2023
- Full Text
- View/download PDF
173. Long-Term Outcomes in Children with Congenital Toxoplasmosis-A Systematic Review.
- Author
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Garweg JG, Kieffer F, Mandelbrot L, Peyron F, and Wallon M
- Abstract
Even in the absence of manifestations at birth, children with congenital toxoplasmosis (CT) may develop serious long-term sequelae later in life. This systematic review aims to present the current state of knowledge to base an informed decision on how to optimally manage these pregnancies and children. For this, a systematic literature search was performed on 28 July 2022 in PubMed, CENTRAL, ClinicalTrials.gov, Google Scholar and Scopus to identify all prospective and retrospective studies on congenital toxoplasmosis and its long-term outcomes that were evaluated by the authors. We included 31 research papers from several countries. Virulent parasite strains, low socioeconomic status and any delay of treatment seem to contribute to a worse outcome, whereas an early diagnosis of CT as a consequence of prenatal screening may be beneficial. The rate of ocular lesions in treated children increases over time to 30% in European and over 70% in South American children and can be considerably reduced by early treatment in the first year of life. After treatment, new neurological manifestations are not reported, while ocular recurrences are observed in more than 50% of patients, with a mild to moderate impact on quality of life in European cohorts when compared to a significantly reduced quality of life in the more severely affected South American children. Though CT is rare and less severe in Europe when compared with South America, antenatal screening is the only effective way to diagnose and treat affected individuals at the earliest possible time in order to reduce the burden of disease and achieve satisfying outcomes.
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- 2022
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174. Building Programs to Eradicate Toxoplasmosis Part II: Education.
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Felín MS, Wang K, Moreira A, Grose A, Leahy K, Zhou Y, Clouser FA, Siddiqui M, Leong N, Goodall P, Michalowski M, Ismail M, Christmas M, Schrantz S, Caballero Z, Norero X, Estripeaut D, Ellis D, Raggi C, Castro C, Rengifo-Herrera C, Moossazadeh D, Ramirez M, Pandey A, Ashi K, Dovgin S, Dixon A, Li X, Begeman I, Heichman S, Lykins J, Villalobos-Cerrud D, Fabrega L, Montalvo JLS, Mendivil C, Quijada MR, Fernández-Pirla S, de La Guardia V, Wong D, de Guevara ML, Flores C, Borace J, García A, Caballero N, de Saez MTM, Politis M, Ross S, Dogra M, Dhamsania V, Graves N, Kirchberg M, Mathur K, Aue A, Restrepo CM, Llanes A, Guzman G, Rebellon A, Boyer K, Heydemann P, Noble AG, Swisher C, Rabiah P, Withers S, Hull T, Frim D, McLone D, Su C, Blair M, Latkany P, Mui E, Vasconcelos-Santos DV, Villareal A, Perez A, Galvis CAN, Montes MV, Perez NIC, Ramirez M, Chittenden C, Wang E, Garcia-López LL, Muñoz-Ortiz J, Rivera-Valdivia N, Bohorquez-Granados MC, de-la-Torre GC, Padrieu G, Hernandez JDV, Celis-Giraldo D, Dávila JAA, Torres E, Oquendo MM, Arteaga-Rivera JY, Nicolae DL, Rzhetsky A, Roizen N, Stillwaggon E, Sawers L, Peyron F, Wallon M, Chapey E, Levigne P, Charter C, De Frias M, Montoya J, Press C, Ramirez R, Contopoulos-Ioannidis D, Maldonado Y, Liesenfeld O, Gomez C, Wheeler K, Zehar S, McAuley J, Limonne D, Houze S, Abraham S, Piarroux R, Tesic V, Beavis K, Abeleda A, Sautter M, El Mansouri B, El Bachir A, Amarir F, El Bissati K, Holfels E, Penn R, Cohen W, de-la-Torre A, Britton G, Motta J, Ortega-Barria E, Romero IL, Meier P, Grigg M, Gómez-Marín J, Kosagisharaf JR, Llorens XS, Reyes O, and McLeod R
- Abstract
Purpose of Review: Review work to create and evaluate educational materials that could serve as a primary prevention strategy to help both providers and patients in Panama, Colombia, and the USA reduce disease burden of Toxoplasma infections., Recent Findings: Educational programs had not been evaluated for efficacy in Panama, USA, or Colombia., Summary: Educational programs for high school students, pregnant women, medical students and professionals, scientists, and lay personnel were created. In most settings, short-term effects were evaluated. In Panama, Colombia, and USA, all materials showed short-term utility in transmitting information to learners. These educational materials can serve as a component of larger public health programs to lower disease burden from congenital toxoplasmosis. Future priorities include conducting robust longitudinal studies of whether education correlates with reduced adverse disease outcomes, modifying educational materials as new information regarding region-specific risk factors is discovered, and ensuring materials are widely accessible., Competing Interests: Conflict of Interest Denis Limone Pharm D,is Chairman , shareholder and CEO and Raphael Piarroux Pharm D, PhD, is RandD Director and employee at LDBio Diagnostics. A patent application was submitted in the United States for the development of the whole blood point of care test with the scientists at the University of Chicago to insure its continued high quality performance and reproducibility. The authors declare no other competing interests..
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- 2022
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175. Congenital toxoplasmosis: Should we still care about screening?
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Petersen E, Meroni V, Vasconcelos-Santos DV, Mandelbrot L, and Peyron F
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Prenatal systematic screening for congenital toxoplasmosis has been performed in Austria and France since 1975 and neonatal screening for congenital toxoplasmosis has been part of the New England Newborn screening program since 1986. In this narrative review we review the data leading up to the systematic screening programs in Austria and France, highlighting the main finding of the European Union funded research in the 1990s and early 2000s. Different descriptive studies of the effect of pre- or postnatal treatment are discussed. Toxoplasma gondii has different genetic lineages with different pathogenicity in humans. This means that results in areas with a low pathogenic lineage cannot be extrapolated to an area with highly pathogenic lineages. The importance of meat as a source of infection is discussed in the light of an increased prevalence of T.gondii in organic livestock production ., Competing Interests: On behalf of all authors we declare no conflict of interest., (© 2022 The Authors.)
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- 2022
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176. Building Programs to Eradicate Toxoplasmosis Part IV: Understanding and Development of Public Health Strategies and Advances "Take a Village".
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Felín MS, Wang K, Moreira A, Grose A, Leahy K, Zhou Y, Clouser FA, Siddiqui M, Leong N, Goodall P, Michalowski M, Ismail M, Christmas M, Schrantz S, Caballero Z, Norero X, Estripeaut D, Ellis D, Raggi C, Castro C, Moossazadeh D, Ramirez M, Pandey A, Ashi K, Dovgin S, Dixon A, Li X, Begeman I, Heichman S, Lykins J, Villalobos-Cerrud D, Fabrega L, Montalvo JLS, Mendivil C, Quijada MR, Fernández-Pirla S, de La Guardia V, Wong D, de Guevara ML, Flores C, Borace J, García A, Caballero N, Rengifo-Herrera C, de Saez MTM, Politis M, Ross S, Dogra M, Dhamsania V, Graves N, Kirchberg M, Mathur K, Aue A, Restrepo CM, Llanes A, Guzman G, Rebellon A, Boyer K, Heydemann P, Noble AG, Swisher C, Rabiah P, Withers S, Hull T, Frim D, McLone D, Su C, Blair M, Latkany P, Mui E, Vasconcelos-Santos DV, Villareal A, Perez A, Galvis CAN, Montes MV, Perez NIC, Ramirez M, Chittenden C, Wang E, Garcia-López LL, Padrieu G, Muñoz-Ortiz J, Rivera-Valdivia N, Bohorquez-Granados MC, de-la-Torre GC, Hernandez JDV, Celis-Giraldo D, Dávila JAA, Torres E, Oquendo MM, Arteaga-Rivera JY, Nicolae DL, Rzhetsky A, Roizen N, Stillwaggon E, Sawers L, Peyron F, Wallon M, Chapey E, Levigne P, Charter C, De Frias M, Montoya J, Press C, Ramirez R, Contopoulos-Ioannidis D, Maldonado Y, Liesenfeld O, Gomez C, Wheeler K, Zehar S, McAuley J, Limonne D, Houze S, Abraham S, Piarroux R, Tesic V, Beavis K, Abeleda A, Sautter M, El Mansouri B, El Bachir A, Amarir F, El Bissati K, Holfels E, Frim D, McLone D, Penn R, Cohen W, de-la-Torre A, Britton G, Motta J, Ortega-Barria E, Romero IL, Meier P, Grigg M, Gómez-Marín J, Kosagisharaf JR, Llorens XS, Reyes O, and McLeod R
- Abstract
Purpose of Review: Review international efforts to build a global public health initiative focused on toxoplasmosis with spillover benefits to save lives, sight, cognition and motor function benefiting maternal and child health., Recent Findings: Multiple countries' efforts to eliminate toxoplasmosis demonstrate progress and context for this review and new work., Summary: Problems with potential solutions proposed include accessibility of accurate, inexpensive diagnostic testing, pre-natal screening and facilitating tools, missed and delayed neonatal diagnosis, restricted access, high costs, delays in obtaining medicines emergently, delayed insurance pre-approvals and high medicare copays taking considerable physician time and effort, harmful shortcuts being taken in methods to prepare medicines in settings where access is restricted, reluctance to perform ventriculoperitoneal shunts promptly when needed without recognition of potential benefit, access to resources for care, especially for marginalized populations, and limited use of recent advances in management of neurologic and retinal disease which can lead to good outcomes., Supplementary Information: The online version contains supplementary material available at 10.1007/s40124-022-00268-x., Competing Interests: Conflict of Interest/Competing Interests There are no other disclosures and no other competing interests., (© The Author(s) 2022.)
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- 2022
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177. Building Programs to Eradicate Toxoplasmosis Part I: Introduction and Overview.
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Felín MS, Wang K, Moreira A, Grose A, Leahy K, Zhou Y, Clouser FA, Siddiqui M, Leong N, Goodall P, Michalowski M, Ismail M, Christmas M, Schrantz S, Caballero Z, Norero X, Estripeaut D, Ellis D, Raggi C, Castro C, Moossazadeh D, Ramirez M, Pandey A, Ashi K, Dovgin S, Dixon A, Li X, Begeman I, Heichman S, Lykins J, Villalobos-Cerrud D, Fabrega L, Montalvo JLS, Mendivil C, Quijada MR, Fernández-Pirla S, de La Guardia V, Wong D, de Guevara ML, Flores C, Borace J, García A, Caballero N, Rengifo-Herrera C, de Saez MTM, Politis M, Wroblewski K, Karrison T, Ross S, Dogra M, Dhamsania V, Graves N, Kirchberg M, Mathur K, Aue A, Restrepo CM, Llanes A, Guzman G, Rebellon A, Boyer K, Heydemann P, Noble AG, Swisher C, Rabiah P, Withers S, Hull T, Su C, Blair M, Latkany P, Mui E, Vasconcelos-Santos DV, Villareal A, Perez A, Galvis CAN, Montes MV, Perez NIC, Ramirez M, Chittenden C, Wang E, Garcia-López LL, Muñoz-Ortiz J, Rivera-Valdivia N, Bohorquez-Granados MC, de-la-Torre GC, Padrieu G, Hernandez JDV, Celis-Giraldo D, Dávila JAA, Torres E, Oquendo MM, Arteaga-Rivera JY, Nicolae DL, Rzhetsky A, Roizen N, Stillwaggon E, Sawers L, Peyron F, Wallon M, Chapey E, Levigne P, Charter C, De Frias M, Montoya J, Press C, Ramirez R, Contopoulos-Ioannidis D, Maldonado Y, Liesenfeld O, Gomez C, Wheeler K, Holfels E, Frim D, McLone D, Penn R, Cohen W, Zehar S, McAuley J, Limonne D, Houze S, Abraham S, Piarroux R, Tesic V, Beavis K, Abeleda A, Sautter M, El Mansouri B, El Bachir A, Amarir F, El Bissati K, de-la-Torre A, Britton G, Motta J, Ortega-Barria E, Romero IL, Meier P, Grigg M, Gómez-Marín J, Kosagisharaf JR, Llorens XS, Reyes O, and McLeod R
- Abstract
Purpose of Review: Review building of programs to eliminate Toxoplasma infections., Recent Findings: Morbidity and mortality from toxoplasmosis led to programs in USA, Panama, and Colombia to facilitate understanding, treatment, prevention, and regional resources, incorporating student work., Summary: Studies foundational for building recent, regional approaches/programs are reviewed. Introduction provides an overview/review of programs in Panamá, the United States, and other countries. High prevalence/risk of exposure led to laws mandating testing in gestation, reporting, and development of broad-based teaching materials about Toxoplasma. These were tested for efficacy as learning tools for high-school students, pregnant women, medical students, physicians, scientists, public health officials and general public. Digitized, free, smart phone application effectively taught pregnant women about toxoplasmosis prevention. Perinatal infection care programs, identifying true regional risk factors, and point-of-care gestational screening facilitate prevention and care. When implemented fully across all demographics, such programs present opportunities to save lives, sight, and cognition with considerable spillover benefits for individuals and societies., Supplementary Information: The online version contains supplementary material available at 10.1007/s40124-022-00269-w., Competing Interests: Conflict of InterestDenis Limonne Pharm D, PhD and Raphael Piarroux Pharm D, PhD, are the owner and Scientists at LDBio. A patent application was submitted in the United States for the development of the whole blood point of care test with the scientists at the University of Chicago to insure its continued high-quality performance and reproducibility of the results described herein. In the United States and Panama in the more recent studies the LDBio kit was provided for the studies without charge by D Limonne. The Roche kit was provided without charge in Panama. For the predicate test costs for the comparison test for 70 consecutive persons for the feasibility clinical trial the cost of performing the Biorad IgG and IgM tests was provided by Kiphard Foundation. Kamal El Bissati is heading the initiatives to prevent toxoplasmosis in Morocco. Patents have been obtained for the medicine, anti-sense, vaccine, biomarker development work to facilitate their development toward clinical use and sustain availability if/when they are used in clinical practice. RMcLeod was reimbursed for time in performing a literature review concerning Spiramycin by Sanofi Pasteur in accordance with Sunshine laws. RMcLeod (with her colleagues) shared first prize merit award in the Alzgerm initiative to identify the highest quality and rigorously developed and described work demonstrating that a pathogen can initiate, progress and contribute to neurodegenerative diseases, and that there can be effect of this chronic active infection on cognition, motor function and other disease processes. This monetary prize was used to further this ongoing work.Competing InterestsThere are no other disclosures and no competing interests., (© The Author(s) 2022.)
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- 2022
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178. Concerning one case of rupture of a flow regulator: How patient safety procedures contribute to the correct use of medical devices.
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Cherpin A, Peyron F, Desmazes-Dufeu N, Ragni E, Lassale B, and Bues-Charbit M
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- Humans, Infusions, Intravenous, Male, Pharmaceutical Preparations, Parenteral Nutrition, Patient Safety
- Abstract
Flow regulators are widely used in hospitals to assist with intravenous (IV) infusion of medication. The rupture of a flow regulator at the base of the clamp was observed during parenteral nutrition. This rupture resulted in fluid leakage and an inlet of air, responsible for an air embolism in a fragile patient who had undergone a bilateral lung transplant. The patient's clinical condition required him to be transferred to a continuous monitoring unit. A serious Adverse Event in Healthcare (AEH) was reported, as well as a medical device vigilance report. A Feedback Committee (FC) was set up and it recommended an audit within the health care departments to study the conditions for use of flow regulators and to propose corrective actions. Despite the technical data sheet of the device not recommending the administration of lipid emulsions and glucose solutions above 10%, the manufacturer's expert report concluded that the mechanical failure could not be linked to the type of solution. However, the audit did reveal a lack of knowledge of certain rules for using this device. The analysis of this AEH is part of the establishment's patient safety procedure. The AEH highlighted a deviation in care concerning the conditions for use of flow regulators, thus resulting in misuse. The collaboration between the various actors involved in the analysis of this AEH led to the implementation of improvement actions on the root causes, related to the lack of information and of training for professionals on correct use of the medical device.
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- 2021
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179. High performance of a novel point-of-care blood test for Toxoplasma infection in women from diverse regions of Morocco.
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El Mansouri B, Amarir F, Peyron F, Adlaoui EB, Piarroux R, Lykins J, El Abbassi M, Nekkal N, Bouhlal N, Makkaoui K, Barkat A, Lyaghfouri A, Zhou Y, Rais S, Oudghiri M, Elkoraichi I, Zekri M, Belkadi N, Mellouk H, Rhajaoui M, Boutajangout A, Sadak A, Limonne D, McLeod R, and El Bissati K
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- Adolescent, Adult, Aged, Antibodies, Protozoan blood, Female, Humans, Immunoglobulin G blood, Immunoglobulin M blood, Middle Aged, Morocco epidemiology, Point-of-Care Testing economics, Pregnancy, Prevalence, Risk Factors, Sensitivity and Specificity, Seroepidemiologic Studies, Toxoplasmosis epidemiology, Toxoplasmosis immunology, Toxoplasmosis, Congenital blood, Toxoplasmosis, Congenital diagnosis, Young Adult, Point-of-Care Testing standards, Toxoplasma immunology, Toxoplasmosis blood, Toxoplasmosis diagnosis
- Abstract
Point-of-care (POC) testing for Toxoplasma infection has the potential to revolutionize diagnosis and management of toxoplasmosis, especially in high-risk populations in areas with significant environmental contamination and poor health infrastructure precluding appropriate follow-up and preventing access to medical care. Toxoplasmosis is a significant public health challenge in Morocco, with a relatively heavy burden of infection and, to this point, minimal investment nationally to address this infection. Herein, we analyse the performance of a novel, low-cost rapid test using fingerstick-derived whole blood from 632 women (82 of whom were pregnant) from slums, educational centres, and from nomad groups across different geographical regions (i.e. oceanic, mountainous) of Morocco. The POC test was highly sensitive and specific from all settings. In the first group of 283 women, sera were tested by Platelia ELISA IgG and IgM along with fingerstick whole blood test. Then a matrix study with 349 women was performed in which fingerstick - POC test results and serum obtained by venipuncture contemporaneously were compared. These results show high POC test performance (Sensitivity: 96.4% [IC95 90.6-98.9%]; Specificity: 99.6% [IC95 97.3-99.9%]) and high prevalence of Toxoplasma infection among women living in rural and mountainous areas, and in urban areas with lower educational levels. The high performance of POC test confirms that it can reduce the need for venipuncture and clinical infrastructure in a low-resource setting. It can be used to efficiently perform seroprevalence determinations in large group settings across a range of demographics, and potentially expands healthcare access, thereby preventing human suffering.
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- 2021
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180. [Toxoplasmosis in pregnancy: Practical Management].
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Mandelbrot L, Kieffer F, Wallon M, Winer N, Massardier J, Picone O, Fuchs F, Benoist G, Garcia-Meric P, L'Ollivier C, Paris L, Piarroux R, Villena I, and Peyron F
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- Child, Female, Humans, Infant, Newborn, Infectious Disease Transmission, Vertical prevention & control, Pregnancy, Prenatal Diagnosis, Pregnancy Complications, Infectious diagnosis, Pregnancy Complications, Infectious drug therapy, Toxoplasmosis diagnosis, Toxoplasmosis drug therapy, Toxoplasmosis, Congenital diagnosis, Toxoplasmosis, Congenital drug therapy, Toxoplasmosis, Congenital prevention & control
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The burden of congenital toxoplasmosis has become small in France today, in particular as a result of timely therapy for pregnant women, fetuses and newborns. Thus, the French screening and prevention program has been evaluated and recently confirmed despite a decline over time in the incidence of toxoplasmosis. Serological diagnosis of maternal seroconversion is usually simple but can be difficult when the first trimester test shows the presence of IgM, requiring referral to an expert laboratory. Woman with confirmed seroconversion should be referred quickly to an expert center, which will decide with her on treatment and antenatal diagnosis. Although the level of proof is moderate, there is a body of evidence in favor of active prophylactic prenatal treatment started as early as possible (ideally within 3 weeks of seroconversion) to reduce the risk of maternal-fetal transmission, as well as symptoms in children. The recommended therapies to prevent maternal-fetal transmission are: (1) spiramycin in case of maternal infection before 14 gestational weeks; (2) pyrimethamine and sulfadiazine (P-S) with folinic acid in case of maternal infection at 14 WG or more. Amniocentesis is recommended to guide prenatal and neonatal care. If fetal infection is diagnosed by PCR on amniotic fluid, therapy with P-S should be initiated as early as possible or continued in order reduce the risk of damage to the brain or eyes. Further research is required to validate new approaches to preventing congenital toxoplasmosis., (Copyright © 2021. Published by Elsevier Masson SAS.)
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- 2021
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181. Chronic Toxoplasma gondii infection and sleep-wake alterations in mice.
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Dupont D, Lin JS, Peyron F, Akaoka H, and Wallon M
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- Animals, Dexamethasone pharmacology, Dexamethasone therapeutic use, Electroencephalography drug effects, Electroencephalography methods, Glucocorticoids pharmacology, Glucocorticoids therapeutic use, Male, Mice, Mice, Inbred CBA, Sleep drug effects, Sleep physiology, Sleep Stages drug effects, Toxoplasmosis drug therapy, Wakefulness drug effects, Sleep Stages physiology, Toxoplasmosis physiopathology, Wakefulness physiology
- Abstract
Aim: Toxoplasma gondii (Tg) is an intracellular parasite infecting more than a third of the human population. Yet, the impact of Tg infection on sleep, a highly sensitive index of brain functions, remains unknown. We designed an experimental mouse model of chronic Tg infection to assess the effects on sleep-wake states., Methods: Mice were infected using cysts of the type II Prugniaud strain. We performed chronic sleep-wake recordings and monitoring as well as EEG power spectral density analysis in order to assess the quantitative and qualitative changes of sleep-wake states. Pharmacological approach was combined to evaluate the direct impact of the infection and inflammation caused by Tg., Results: Infected mouse exhibited chronic sleep-wake alterations over months, characterized by a marked increase (>20%) in time spent awake and in cortical EEG θ power density of all sleep-wake states. Meanwhile, slow-wave sleep decreased significantly. These effects were alleviated by an anti-inflammatory treatment using corticosteroid dexamethasone., Conclusion: We demonstrated for the first time the direct consequences of Tg infection on sleep-wake states. The persistently increased wakefulness and reduced sleep fit with the parasite's strategy to enhance dissemination through host predation and are of significance in understanding the neurodegenerative and neuropsychiatric disorders reported in infected patients., (© 2021 The Authors. CNS Neuroscience & Therapeutics Published by John Wiley & Sons Ltd.)
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- 2021
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182. Toxoplasma gondii seroprevalence among pregnant women in Rabat, Morocco.
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Laboudi M, Taghy Z, Duieb O, Peyron F, and Sadak A
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Background: Toxoplasmosis is an infectious disease caused by a protozoan parasite named Toxoplasma gondii (T.gondii). Pregnant women are considered one of the risk groups. The objective of this retrospective study is to provide an updated estimate of the seroprevalence of anti-T. gondii antibodies among a group of Moroccan pregnant women monitored at the Parasitology Laboratory of the National Institute of Hygiene in Rabat in Morocco., Methods: Serum samples were tested for the presence of specific anti-T. gondii immunoglobulin G (IgG) and immunoglobulin M (IgM) antibodies using indirect enzyme-linked immunosorbent assay (ELISA). Anti-Toxoplasma IgM- and IgG-positive cases were also evaluated with the anti-Toxoplasma IgG avidity test. All cases were evaluated according to the age, parity, and historical of abortion., Results: Among 677 pregnant women, 94.1% (637/677) were serologically screened for the first time and therefore had no knowledge of their serological status, and only 5.9% (40/677) were screened for the second or third time. The overall anti-T. gondii IgG and IgM seropositivity among the 637 pregnant women included in the study analysis was 43% (274/637) and 3.9% (25/637), respectively. The use of the IgG avidity test allowed excluding recent infection among 83% of cases with IgG and IgM positive sera. The mean age was 29.4 ± 6.3 years. The result of the bivariate analysis revealed that the age influenced significantly the seroprevalence rate, while the parity and the existence of previous spontaneous abortion did not have any significant statistical correlation with seropositivity to T. gondii., Conclusion: This study shows that 43% of pregnant women were positive and 57% of them had no antibody against the T. gondii infection. However, the pregnancy follow-up and the counseling of pregnant women remain essential for the prevention of congenital toxoplasmosis.
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- 2021
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183. The cost-effectiveness of neonatal versus prenatal screening for congenital toxoplasmosis.
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Binquet C, Lejeune C, Seror V, Peyron F, Bertaux AC, Scemama O, Quantin C, Béjean S, Stillwaggon E, and Wallon M
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- Austria, Clinical Decision-Making, Female, France, Humans, Infant, Newborn, Models, Theoretical, Pregnancy, Slovenia, Toxoplasmosis, Congenital economics, Cost-Benefit Analysis methods, Neonatal Screening economics, Prenatal Diagnosis economics, Toxoplasmosis, Congenital diagnosis
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Background: Congenital Toxoplasmosis (CT) can have severe consequences. France, Austria, and Slovenia have prenatal screening programs whereas some other countries are considering universal screening to reduce congenital transmission and severity of infection in children. The efficiency of such programs is debated increasingly as seroprevalence among pregnant women and incidence of congenital toxoplasmosis show a steady decrease. In addition, uncertainty remains regarding the effectiveness of pre- and postnatal treatments., Method: To identify cost-effective strategies, prenatal and neonatal screenings were compared using a decision-analytic model based on French guidelines and current knowledge of long-term evolution of the disease in treated children. Epidemiological data were extracted from the scientific literature and clinical data from the French Lyon cohort. Strategies were compared at one year of age, when infection can be definitively evaluated, and at 15 years of age, after which validated outcome data become scarce. The analysis was performed from the French Health Insurance System perspective and included direct medical costs for pregnant women and their children., Results: The 1-year Incremental Cost-Effectiveness Ratio showed that prenatal screening would require investing €14,826 to avoid one adverse event (liveborn with CT, fetal loss, neonatal death or pregnancy termination) compared to neonatal screening. Extra investment increased up to €21,472 when considering the 15-year endpoint., Conclusions: Prenatal screening is cost-effective as compared to neonatal screening in moderate prevalence areas with predominant Type II strains. In addition, prenatal screening, by providing closer follow-up of women at risk increases the number of occasions for education avoiding toxoplasmosis., Competing Interests: The authors have declared that no competing interests exist.
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- 2019
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184. Plasmonic gold chips for the diagnosis of Toxoplasma gondii, CMV, and rubella infections using saliva with serum detection precision.
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Li X, Pomares C, Peyron F, Press CJ, Ramirez R, Geraldine G, Cannavo I, Chapey E, Levigne P, Wallon M, Montoya JG, and Dai H
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- Adolescent, Adult, Antibodies, Protozoan analysis, Antibodies, Viral analysis, Antigens, Protozoan chemistry, Antigens, Viral chemistry, Child, Child, Preschool, Cytomegalovirus immunology, Cytomegalovirus isolation & purification, Humans, Immunoglobulin G analysis, Immunoglobulin M analysis, Infant, Infant, Newborn, Middle Aged, Rubella virus immunology, Rubella virus isolation & purification, Sensitivity and Specificity, Toxoplasma immunology, Toxoplasma isolation & purification, Young Adult, Cytomegalovirus Infections diagnosis, Gold chemistry, Protein Array Analysis standards, Rubella diagnosis, Saliva immunology, Serologic Tests standards, Toxoplasmosis diagnosis
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Sampling the blood compartment by an invasive procedure such as phlebotomy is the most common approach used for diagnostic purposes. However, phlebotomy has several drawbacks including pain, vasovagal reactions, and anxiety. Therefore, alternative approaches should be tested to minimize patient's discomfort. Saliva is a reasonable compartment; when obtained, it generates little or no anxiety. We setup a multiplexed serology assay for detection of Toxoplasma gondii IgG and IgM, rubella IgG, and CMV IgG, in serum, whole blood, and saliva using novel plasmonic gold (pGOLD) chips. pGOLD test results in serum, whole blood, and saliva were compared with commercial kits test results in serum. One hundred twenty serum/saliva sets (Lyon) and 28 serum/whole blood/saliva sets (Nice) from France were tested. In serum and whole blood, sensitivity and specificity of multiplex T. gondii, CMV, and rubella IgG were 100% in pGOLD when compared to commercial test results in serum. In saliva, sensitivity and specificity for T. gondii and rubella IgG were 100%, and for CMV IgG, sensitivity and specificity were 92.9% and 100%, respectively, when compared to commercial test results in serum. We were also able to detect T. gondii IgM in saliva with sensitivity and specificity of 100% and 95.4%, respectively, when compared to serum test results. Serological testing by multiplex pGOLD assay for T. gondii, rubella, and CMV in saliva is reliable and likely to be more acceptable for systematic screening of pregnant women, newborn, and immunocompromised patients.
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- 2019
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185. Maternal and Congenital Toxoplasmosis: Diagnosis and Treatment Recommendations of a French Multidisciplinary Working Group.
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Peyron F, L'ollivier C, Mandelbrot L, Wallon M, Piarroux R, Kieffer F, Hadjadj E, Paris L, and Garcia-Meric P
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Women infected with toxoplasmosis during pregnancy do not present symptoms in most cases, but the consequences of the congenital infection may be severe for the unborn child. Fetal damage can range from asymptomatic to severe neurological alterations to retinal lesions prone to potential flare up and relapses lifelong. Despite the possible severity of outcome, congenital toxoplasmosis (CT) is a neglected disease. There is no consensus regarding screening during pregnancy, prenatal/postnatal treatment or short or medium term follow-up. Since 1992, France has offered systematic serological testing to non-immune pregnant women, monthly until delivery. Any maternal infection is thus detected; moreover, diagnosis of congenital infection can be made at birth and follow-up can be provided. "Guidelines" drawn up by a multidisciplinary group are presented here, concerning treatment, before and after birth. The recommendations are based on the regular analysis of the literature and the results of the working group. The evaluation of the recommendations takes into account the robustness of the recommendation and the quality of the evidence.
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- 2019
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186. Comparison of immunoblotting (IgA and IgG) and the Goldmann-Witmer coefficient for diagnosis of ocular toxoplasmosis in immunocompetent patients.
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Mathis T, Beccat S, Sève P, Peyron F, Wallon M, and Kodjikian L
- Subjects
- Enzyme-Linked Immunosorbent Assay, Eye Infections, Parasitic blood, Eye Infections, Parasitic parasitology, Female, Humans, Immunoblotting methods, Male, Retrospective Studies, Toxoplasmosis, Ocular blood, Toxoplasmosis, Ocular parasitology, Antibodies, Protozoan analysis, Eye Infections, Parasitic diagnosis, Immunocompromised Host immunology, Immunoglobulin A immunology, Immunoglobulin G immunology, Toxoplasma immunology, Toxoplasmosis, Ocular diagnosis
- Abstract
Background: Ocular toxoplasmosis (OT) is a common cause of posterior uveitis worldwide. The diagnosis of OT is based on clinical findings, but in most cases, laboratory tests are required to confirm the aetiology, especially when other diseases are suspected. The aim of this study was to evaluate which methods, between the Goldmann-Witmer coefficient (GWC) and immunoblotting (IB) with both IgG and IgA, in aqueous humour (AH) samples, can be the most sensitive to diagnose OT, in current practice, especially in the first three weeks., Methods: Retrospectively reviewed records of 87 consecutive patients who had underwent AH and serum sample, 42 patients with suspected OT and 45 patients with suspected other ocular inflammatory diseases. All samples were analysed by both GWC and IB., Results: The GWC was significant in 47.6% of patients presenting with suspected OT. The intraocular production of specific antibody anti-Toxoplasma gondii IgG and IgA was revealed by IB in 71.4% of samples. The combination of these two methods increased the sensitivity to 76.2%. Based on the interval between symptom onset and paracentesis, IB had a greater sensitivity than GWC when sample of AH was taken in the first three weeks (64.7% vs 23.5%, P=0.039), while the difference between the sensitivity of IB and GWC was less important in cases with an interval >3 weeks (76% vs 64% P=0.625)., Conclusion: IB seems to be more useful than the GWC if only one of these methods can be performed, especially during the first three weeks after symptom onset., Competing Interests: Competing interests: None declared., (© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.)
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- 2018
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187. Global initiative for congenital toxoplasmosis: an observational and international comparative clinical analysis.
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El Bissati K, Levigne P, Lykins J, Adlaoui EB, Barkat A, Berraho A, Laboudi M, El Mansouri B, Ibrahimi A, Rhajaoui M, Quinn F, Murugesan M, Seghrouchni F, Gómez-Marín JE, Peyron F, and McLeod R
- Subjects
- Colombia, France, Humans, Morocco, Public Health, Toxoplasma genetics, Toxoplasma isolation & purification, Toxoplasmosis, Congenital drug therapy, United States, Toxoplasma physiology, Toxoplasmosis, Congenital parasitology
- Abstract
Globally, congenital toxoplasmosis remains a significant cause of morbidity and mortality, and outbreaks of infection with T. gondii represent a significant, emerging public health burden, especially in the developing world. This parasite is a threat to public health. Disease often is not recognized and is inadequately managed. Herein, we analyze the status of congenital toxoplasmosis in Morocco, Colombia, the United States, and France. We identify the unique challenges faced by each nation in the implementation of optimal approaches to congenital toxoplasmosis as a public health problem. We suggest that developed and developing countries use a multipronged approach, modeling their public health management protocols after those in France. We conclude that education, screening, appropriate treatment, and the development of novel modalities will be required to intervene successfully in caring for individuals with this infection. Gestational screening has been demonstrated to be cost-effective, morbidity-sparing, and life-saving. Recognition of the value and promise of public health interventions to prevent human suffering from this emerging infection will facilitate better patient and societal outcomes.
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- 2018
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188. Rapid, inexpensive, fingerstick, whole-blood, sensitive, specific, point-of-care test for anti-Toxoplasma antibodies.
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Lykins J, Li X, Levigne P, Zhou Y, El Bissati K, Clouser F, Wallon M, Morel F, Leahy K, El Mansouri B, Siddiqui M, Leong N, Michalowski M, Irwin E, Goodall P, Ismail M, Christmas M, Adlaoui EB, Rhajaoui M, Barkat A, Cong H, Begeman IJ, Lai BS, Contopoulos-Ioannidis DG, Montoya JG, Maldonado Y, Ramirez R, Press C, Peyron F, and McLeod R
- Subjects
- Abortion, Spontaneous, Adult, Case-Control Studies, Female, Humans, Immunoglobulin G blood, Immunoglobulin M blood, Morocco epidemiology, Point-of-Care Systems, Pregnancy, Pregnancy Complications, Parasitic blood, Sensitivity and Specificity, Time Factors, Toxoplasma, Toxoplasmosis blood, United States epidemiology, Antibodies, Protozoan blood, Pregnancy Complications, Parasitic diagnosis, Serologic Tests economics, Serologic Tests methods, Toxoplasmosis diagnosis
- Abstract
Competing Interests: I have read the journal’s policy and the authors of this manuscript have the following competing interests: Dr. Rima McLeod worked on a literature review for Sanofi Pasteur.
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- 2018
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189. Oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate in lung cancer surgery: a randomized clinical trial.
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D'Journo XB, Falcoz PE, Alifano M, Le Rochais JP, D'Annoville T, Massard G, Regnard JF, Icard P, Marty-Ane C, Trousse D, Doddoli C, Orsini B, Edouard S, Million M, Lesavre N, Loundou A, Baumstarck K, Peyron F, Honoré S, Dizier S, Charvet A, Leone M, Raoult D, Papazian L, and Thomas PA
- Subjects
- Aged, Chlorhexidine administration & dosage, Cross Infection etiology, Cross Infection prevention & control, Decontamination methods, Double-Blind Method, Female, Humans, Male, Middle Aged, Preoperative Care, Respiration, Artificial, Respiratory Insufficiency etiology, Respiratory Insufficiency therapy, Anti-Infective Agents, Local administration & dosage, Chlorhexidine analogs & derivatives, Lung Neoplasms surgery, Nasopharynx microbiology, Oropharynx microbiology, Pneumonectomy adverse effects
- Abstract
Purpose: Respiratory complications are the leading causes of morbidity and mortality after lung cancer surgery. We hypothesized that oropharyngeal and nasopharyngeal decontamination with chlorhexidine gluconate (CHG) would be an effective method to reduce these complications as reported in cardiac surgery., Methods: In this multicenter parallel-group randomized double-blind placebo-controlled trial, we enrolled consecutive adults scheduled for anatomical pulmonary resection for lung cancer. Perioperative decontamination consisted in oropharyngeal rinse solution (0.12% CHG) and nasopharyngeal soap (4% CHG) or a placebo. The primary outcome measure was the proportion of patients requiring postoperative invasive and/or noninvasive mechanical ventilation (MV). Secondary outcome measures included occurrence of respiratory and non-respiratory healthcare-associated infections (HAIs) and outcomes within 90 days., Results: Between July 2012 and April 2015, 474 patients were randomized. Of them, 24 had their surgical procedure cancelled or withdrew consent. The remaining 450 patients were included in a modified intention-to-treat analysis: 226 were allocated to CHG and 224 to the placebo. Proportions of patients requiring postoperative MV were not significantly different [CHG 14.2%; placebo 15.2%; relative risks (RRs) 0.93; 95% confidence interval (CI) 0.59-1.45; P = 0.76]. Neither of the proportions of patients with respiratory HAIs were different (CHG 13.7%; placebo 12.9%; RRs 1.06; 95% CI 0.66-1.69; P = 0.81). The CHG group had significantly decreased incidence of bacteremia, surgical-site infection and overall Staphylococcus aureus infections. However, there were no significant between-group differences for hospital stay length, change in tracheal microbiota, postoperative antibiotic utilization and outcomes by day 90., Conclusions: CHG decontamination decreased neither MV requirements nor respiratory infections after lung cancer surgery. Additionally, CHG did not change tracheal microbiota or postoperative antibiotic utilization., Trial Registration: This study is registered on ClinicalTrials.gov, number NCT01613365.
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- 2018
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190. Congenital Toxoplasmosis: A Plea for a Neglected Disease.
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Wallon M and Peyron F
- Abstract
Maternal infection by Toxoplasma gondii during pregnancy may have serious consequences for the fetus, ranging from miscarriage, central nervous system involvement, retinochoroiditis, or subclinical infection at birth with a risk of late onset of ocular diseases. As infection in pregnant women is usually symptomless, the diagnosis relies only on serological tests. Some countries like France and Austria have organized a regular serological testing of pregnant women, some others have no prenatal program of surveillance. Reasons for these discrepant attitudes are many and debatable. Among them are the efficacy of antenatal treatment and cost-effectiveness of such a program. A significant body of data demonstrated that rapid onset of treatment after maternal infection reduces the risk and severity of fetal infection. Recent cost-effectiveness studies support regular screening. This lack of consensus put both pregnant women and care providers in a difficult situation. Another reason why congenital toxoplasmosis is disregarded in some countries is the lack of precise information about its impact on the population. Precise estimations on the burden of the disease can be achieved by systematic screening that will avoid bias or underreporting of cases and provide a clear view of its outcome., Competing Interests: FP runs reference centers for toxoplasmic serology funded respectively by Abbott and Siemens companies.
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- 2018
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191. Eight cases of cutaneous leishmaniasis due to Leishmania infantum with protean presentation.
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Dupont D, Phan A, Durupt F, and Peyron F
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- Adult, Child, Facial Dermatoses parasitology, Humans, Leishmaniasis, Visceral, Leishmania infantum, Leishmaniasis, Cutaneous parasitology
- Published
- 2017
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192. Point-of-care testing for Toxoplasma gondii IgG/IgM using Toxoplasma ICT IgG-IgM test with sera from the United States and implications for developing countries.
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Begeman IJ, Lykins J, Zhou Y, Lai BS, Levigne P, El Bissati K, Boyer K, Withers S, Clouser F, Noble AG, Rabiah P, Swisher CN, Heydemann PT, Contopoulos-Ioannidis DG, Montoya JG, Maldonado Y, Ramirez R, Press C, Stillwaggon E, Peyron F, and McLeod R
- Subjects
- Costs and Cost Analysis, Developing Countries, Diagnostic Tests, Routine economics, Diagnostic Tests, Routine methods, Humans, Immunoassay economics, Sensitivity and Specificity, United States, Antibodies, Protozoan blood, Immunoassay methods, Immunoglobulin G blood, Immunoglobulin M blood, Point-of-Care Testing economics, Toxoplasma immunology, Toxoplasmosis diagnosis
- Abstract
Background: Congenital toxoplasmosis is a serious but preventable and treatable disease. Gestational screening facilitates early detection and treatment of primary acquisition. Thus, fetal infection can be promptly diagnosed and treated and outcomes can be improved., Methods: We tested 180 sera with the Toxoplasma ICT IgG-IgM point-of-care (POC) test. Sera were from 116 chronically infected persons (48 serotype II; 14 serotype I-III; 25 serotype I-IIIa; 28 serotype Atypical, haplogroup 12; 1 not typed). These represent strains of parasites infecting mothers of congenitally infected children in the U.S. 51 seronegative samples and 13 samples from recently infected persons known to be IgG/IgM positive within the prior 2.7 months also were tested. Interpretation was confirmed by two blinded observers. A comparison of costs for POC vs. commercial laboratory testing methods was performed., Results: We found that this new Toxoplasma ICT IgG-IgM POC test was highly sensitive (100%) and specific (100%) for distinguishing IgG/IgM-positive from negative sera. Use of such reliable POC tests can be cost-saving and benefit patients., Conclusions: Our work demonstrates that the Toxoplasma ICT IgG-IgM test can function reliably as a point-of-care test to diagnose Toxoplasma gondii infection in the U.S. This provides an opportunity to improve maternal-fetal care by using approaches, diagnostic tools, and medicines already available. This infection has serious, lifelong consequences for infected persons and their families. From the present study, it appears a simple, low-cost POC test is now available to help prevent morbidity/disability, decrease cost, and make gestational screening feasible. It also offers new options for improved prenatal care in low- and middle-income countries.
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- 2017
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193. Lifelong Persistence of Toxoplasma Cysts: A Questionable Dogma?: (Trends in Parasitology 33, 93-101; 2017).
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Rougier S, Montoya JG, and Peyron F
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- 2017
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194. Cutaneous myiasis.
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Graveriau C and Peyron F
- Subjects
- Aged, Animals, Arm parasitology, French Guiana, Humans, Male, Skin parasitology, Travel, Diptera pathogenicity, Larva pathogenicity, Myiasis parasitology, Myiasis pathology, Myiasis surgery
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- 2017
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195. In Reply: Sulfadoxine-Pyrimethamine Combination in Congenital Toxoplasmosis.
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Dupont D and Peyron F
- Subjects
- Antimalarials, Drug Combinations, Drug Therapy, Combination, Humans, Pyrimethamine, Sulfadoxine, Toxoplasmosis, Congenital
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- 2017
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196. Congenital Toxoplasmosis in France and the United States: One Parasite, Two Diverging Approaches.
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Peyron F, Mc Leod R, Ajzenberg D, Contopoulos-Ioannidis D, Kieffer F, Mandelbrot L, Sibley LD, Pelloux H, Villena I, Wallon M, and Montoya JG
- Subjects
- Female, France epidemiology, Humans, Infant, Newborn, Pregnancy, Pregnancy Complications, Parasitic therapy, Prognosis, Seroepidemiologic Studies, Toxoplasma genetics, Toxoplasma isolation & purification, Toxoplasmosis, Congenital therapy, United States epidemiology, Antiprotozoal Agents therapeutic use, Pregnancy Complications, Parasitic epidemiology, Pregnancy Complications, Parasitic parasitology, Toxoplasmosis, Congenital epidemiology, Toxoplasmosis, Congenital parasitology
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- 2017
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197. Evaluation of the LDBIO point of care test for the combined detection of toxoplasmic IgG and IgM.
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Chapey E, Wallon M, and Peyron F
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- Female, Humans, Infant, Infant, Newborn, Pregnancy, Seroconversion, Immunoglobulin G blood, Immunoglobulin M blood, Point-of-Care Testing, Toxoplasma immunology
- Abstract
The toxoplasma ICT IgG-IgM rapid diagnostic test for the simultaneous detection of specific toxoplasmic immunoglobulin (Ig) G and IgM was compared with the Architect fully automated chemiluminescence test. Four hundred sera were included, among which 248 scored negative in Architect. The cassettes were easily read with the naked eye. Diagnostic sensitivity and specificity were 97% and 96%, respectively. The test scored 8 false-positive IgG and yielded negative results in 3 sera displaying unspecific IgM in Architect. The LDBIO appears to be a reliable first line test, although the false-positive results for IgG deserve further investigation. Such an easily performed test could be used advantageously for screening for toxoplasmosis in pregnant women., (Copyright © 2016 Elsevier B.V. All rights reserved.)
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- 2017
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198. Assessment of the diagnostic performance of the IDS-iSYS tests for toxo IgG, toxo IgM and avidity.
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Levigne P, Peyron F, and Wallon M
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- Automation, Laboratory methods, Female, Humans, Infant, Newborn, Luminescent Measurements, Pregnancy, Prospective Studies, Sensitivity and Specificity, Antibodies, Protozoan blood, Antibody Affinity, Immunoglobulin G blood, Immunoglobulin M blood, Serologic Tests methods, Toxoplasmosis diagnosis
- Abstract
When acquired during pregnancy toxoplasmosis can have devastating consequences on the fetus. As maternal infection is in the majority of cases subclinical, the diagnosis of toxoplasmosis relies on serological tests for the detection of IgG, IGM and the mesure of IgG avidity. We evaluated the performance of IDS-iSYS a new automatized instrument based on chemiluminescence for the diagnosis of the disease. Our study was based on non-selected samples received in our laboratory either for the determination of serological status or for distinguishing acute from chronic infection. Seven hundred eighty three samples were enrolled in the study. Compared with Architect IgG and IgM assays, the sensitivity and specificity were respectively 99% and 99% for IgG, and 75% and 97% for IgM. We observed higher remaining titers for IDS iSYS IgG, which could reduce the proportions of patients who have to be retested because of doubtful titers. IgM detection and avidity scored equivalent performance with both methods. This automate appears to be a reliable and easy-to-use tool for diagnosing toxoplasmosis in different clinical settings., (Copyright © 2016 Elsevier Inc. All rights reserved.)
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- 2016
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199. Treatment of Congenital Toxoplasmosis: Safety of the Sulfadoxine-Pyrimethamine Combination in Children Based on a Method of Causality Assessment.
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Teil J, Dupont D, Charpiat B, Corvaisier S, Vial T, Leboucher G, Wallon M, and Peyron F
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- Causality, Drug Combinations, Female, Follow-Up Studies, Humans, Infant, Infant, Newborn, Male, Pregnancy, Retrospective Studies, Antimalarials adverse effects, Antimalarials therapeutic use, Drug-Related Side Effects and Adverse Reactions epidemiology, Drug-Related Side Effects and Adverse Reactions pathology, Pyrimethamine adverse effects, Pyrimethamine therapeutic use, Sulfadoxine adverse effects, Sulfadoxine therapeutic use, Toxoplasmosis, Congenital drug therapy
- Abstract
Background: The treatment of newborns and infants with congenital toxoplasmosis is standard practice. Some observational studies have examined safety in newborns, but most of these failed to provide sufficient details for a provisional assessment of causality. The aim of this study was to evaluate the clinical and biological adverse effects of the combination of sulfadoxine-pyrimethamine., Methods: Sixty-five children treated for 1 year with a combination of sulfadoxine-pyrimethamine (1 dose every 10 days) for congenital toxoplasmosis were followed up to evaluate abnormal hematological values and potential adverse events using a standardized method of causality assessment., Results: Nine patients (13.8%) presented at least 1 adverse clinical event that was nonspecific, such as diarrhea on the day of drug administration, vomiting and agitation. In 1 patient, erythema appeared at the end of the treatment and resolved within 10 days. None of these events was attributed to the treatment. Six patients (9.2%) developed an adverse hematological event (neutropenia, n = 3; eosinophilia, n = 2 and both anemia and eosinophilia, n = 1) that was considered to be possibly related to the sulfadoxine-pyrimethamine combination. Four treatments were temporarily interrupted, and toxicity was observed after readministration of treatment in 1 case only. However, none of these adverse events was life threatening., Conclusions: According to our results and previously published data, the combination of sulfadoxine-pyrimethamine seems to be well tolerated. However, the sample size of our study was too small to rule out the risk of less frequent, but nevertheless severe, reactions and, in particular, of hypersensitivity reactions.
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- 2016
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200. Effect of Antenatal Treatment on the Severity of Congenital Toxoplasmosis.
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Wallon M and Peyron F
- Subjects
- Humans, Toxoplasmosis, Pregnancy Complications, Parasitic, Toxoplasmosis, Congenital
- Published
- 2016
- Full Text
- View/download PDF
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