Identifying main drivers and testing control strategies for CCHFV spread.

Crimean Congo Haemorrhagic Fever (CCHF) is an emerging zoonotic disease. The causative agent is a virus (CCHFV), mainly transmitted by ticks of the species Hyalomma marginatum in Eastern Europe and Turkey. In order to test potential scenarios for the control of pathogen spread, the basic reproduction number (R0) for CCHF was calculated. This calculation was based on a population dynamics model and parameter values from the literature for pathogen transmission. The tick population dynamics model takes into account the major processes involved and gives estimates for tick survival from one stage to the other and number of feeding ticks. It also considers the influence of abiotic (meteorological variables) and biotic factors (host densities) on model outputs, which were compared with data collected in Central Anatolia (Turkey). R0 computation was thereafter used to test control strategies and especially the effect of acaricide treatment. Simulation results indicate that such treatments could have valuable effects provided that the acaricide is applied regularly throughout the spring and summer, and over several years. Furthermore, a sensitivity analysis to abiotic and biotic factors showed that, even though temperature has a strong impact on model outputs, host (mainly hare) densities also play a role. The kind of model we have developed provides insight into the ability of different strategies to prevent and control disease spread and has proved its relevance when associated with field trials.

Evaluation of percutaneous biopsies of renal masses under MRI-guidance: a retrospective study about 26 cases.

OBJECTIVE: To determine whether MRI allows safe and accurate guidance for biopsies of renal masses. MATERIALS AND METHODS: Between May 2010 and September 2013, 26 patients (15 men and 11 women) with 26 renal masses underwent MRI-guided percutaneous biopsy. For each patient, we retrospectively collected the epidemiological, procedural and histopathological data. RESULTS: Mean size of tumour was 3.6 cm (range 0.6 - 9 cm). Mean procedure time was 48 minutes (range 37 - 70 min). Malignancy was found in the percutaneous samples in 81 % (21/26) of the masses. All these cases were considered as true positive biopsies. Benignity was found in the percutaneous samples in 5/26 (19 %) of the masses but was confirmed only in 3 cases. The other 2 cases included one false negative case and one undetermined biopsy, as patient was lost to follow-up. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy of this study were 95.4 %, 100 %, 100 %, 75 % and 96 %, respectively CONCLUSION: MRI-guidance is safe and accurate to target renal masses.

[Public health program planning through the capabilities lens]. / Penser la programmation en santé publique dans une perspective de capabilités.

As a theory of distributive justice, Amartya Sen's theory of capabilities questions the choices and decisions associated with the development and planning of public health programs. In this paper, the authors describe Sen's approach and explore its implications for public health by applying it to the case of tobacco control programs. Based on the tobacco control objectives set by the WHO and on the MPOWER package of measures, they notice that the translation of the objectives in capabilities call for a greater attention to the conditions of living of the different population groups. It also put into doubt the measures restricting access to tobacco products that do not account for their differing impacts on adults. The authors conclude that this ethical perspective is likely to be controversial as it may rank freedom as a value that overrides health.

Immunoinflammatory processes: Overlapping mechanisms between obesity and eating disorders?

Obesity and eating disorders are conditions that involve eating behaviors and are sometimes comorbid. Current evidence supports alterations in immunoinflammatory processes in both obesity and eating disorders. A plausible hypothesis is that immunoinflammatory processes may be involved in the pathophysiology of obesity and eating disorders. The aim of this review is to highlight the link between obesity and eating disorders, with a particular focus on immunoinflammatory processes. First, the relation between obesity and eating disorders will be presented, followed by a brief review of the literature on their association with immunoinflammatory processes. Second, developmental factors will be discussed to clarify the link between obesity, eating disorders, and immunoinflammatory processes. Genetic and epigenetic risk factors as well as the potential roles of stress pathways and early life development will be presented. Finally, implications of these findings for future research are discussed. This review highlighted biological and developmental aspects that overlap between obesity and EDs, emphasizing the need for biopsychosocial research approaches to advance current knowledge and practice in these fields.

Elizabethkingia anophelis outbreak in France.

OBJECTIVE: We report an outbreak of Elizabethkingia anophelis infections in France. To the best of our knowledge, this is the first outbreak described in Europe. METHODS: Each E. anophelis-positive microbiological sample was considered a case. All patients were hospitalized in an infectious diseases unit. Clinical, environmental, and microbiological investigations (MALDI-TOF mass spectrometry, PCR, E-test) were performed for each case. RESULTS: Twenty cases were reported from September 2020 to September 2021, mainly community-acquired infections, responsible for nine deaths. The phylogenetic analysis showed a clonal origin and excluded nosocomial transmission. Despite the analysis of multiple environmental specimens, no source of contamination was identified. All strains were highly resistant to cefotaxime, ceftazidime, and imipenem. CONCLUSIONS: Clinicians and microbiologists should be aware of this multidrug-resistant bacterium, capable of causing severe infections. Most strains showed the lowest minimum inhibitory concentration values for cotrimoxazole and ciprofloxacin, making them the best choice for empirical antibiotic therapy.

Accuracy of gradient diffusion method for susceptibility testing of dalbavancin and comparators.

OBJECTIVES: This multicenter study aimed to assess the performances of gradient diffusion (GD) method in comparison to broth microdilution (BMD) method for susceptibility testing of dalbavancin, daptomycin, vancomycin, and teicoplanin. METHODS: Minimum Inhibitory Concentrations (MICs) were retrospectively determined concomitantly by BMD and GD methods, for 93 staphylococci and enterococci isolated from clinical samples. BMD was considered as the gold standard. Essential (EA) and categorical agreements (CA) were calculated. Discordant categorical results were categorized as major (ME) and very major errors (VME). RESULTS: EA and CA were 95.7% and 96.8%, 82.8% and 100%, 97.8% and 96.8%, and 94.6% and 95.7% for dalbavancin, daptomycin, vancomycin, and teicoplanin respectively. Concerning dalbavancin, 3 ME without any VME were observed and discrepancies were low (≤ to 2 two-fold dilutions) between both methods. VME were noted in 1 and 3 cases for vancomycin and teicoplanin, respectively, and resulted from 1 two-fold dilution discrepancy in each case. EA was lower for daptomycin. When they were discrepant, BMD MICs were systematically higher than GD ones. Nevertheless, no categorical discrepancy was noted. CONCLUSIONS: GD appears as an acceptable and convenient alternative for dalbavancin, vancomycin, and teicoplanin MICs determination. Our study also emphasizes how achieving accurate daptomycin MICs remains challenging.

Placental NEGR1 DNA methylation is associated with BMI and neurodevelopment in preschool-age children.

Studies have linked maternal pre-pregnancy obesity and hyperglycaemia with metabolic and neurodevelopmental complications in childhood. DNA methylation (DNAm) might enable foetal adaptations to environmental adversities through important gene loci. NEGR1 is involved in both energy balance and behaviour regulation. The aim of this study was to investigate associations between placental DNAm at the NEGR1 gene locus and childhood anthropometric and neurodevelopmental profiles in preschoolers. We analysed 276 mother-child dyads from Gen3G, a prospective birth cohort from Sherbrooke. At 3yo (40.4 ± 3.0 months), we measured body mass index (BMI) and the mothers reported on offspring neurobehavior using the Strengths and Difficulties Questionnaire (SDQ). We quantified DNAm levels at 30 CpGs at the NEGR1 locus using the MethylationEPIC Array in placental biopsies. DNAm at four CpGs located before NEGR1 second exon predicted child's BMI z-score (cg26153364: ß=-0.16 ± 0.04; p=0.008, cg23166710: ß=0.14 ± 0.08; p=0.03) and SDQ total score (cg04932878: ß=0.22 ± 1.0; p= 3.0x10-4, cg16525738: ß=-0.14 ± 0.18; p=0.01, cg23166710: ß=-0.13 ± 0.36; p= 0.04), explaining 4.2% (p=0.003) and 7.3% (p= 1.3 x 10-4) of BMI-z and SDQ variances. cg23166710 was associated with both childhood phenotypes and correlated with NEGR1 placental expression (r=-0.22, p=0.04), suggesting its possible functional role. Together, maternal metabolic characteristics during pregnancy with NEGR1 DNAm levels explained 7.4% (p=4.2 x 10-4) of BMI-z and 14.2% (p=2.8 x 10-7) of SDQ variance at 3yo. This longitudinal study suggests that placental NEGR1 DNAm is associated with adiposity and neurodevelopment in preschool children and highlights its potential role in their comorbidity.

Dedicated low-field MRI in mice.

The rationale of this work is to point out the relevance of in vivo MR images of mice obtained using a dedicated low-field system. For this purpose a small 0.1 T water-cooled electro-magnet and solenoidal radio frequency (RF) transmit-receive coils were used. All MR images were acquired in three-dimensional (3D) mode. An isolation cell was designed allowing easy placement of the RF coils and simple delivery of gaseous anesthesia as well as warming of the animal. Images with and without contrast agent were obtained in total acquisition times on the order of half an hour to four hours on normal mice as well as on animals bearing tumors. Typical in plane pixel dimensions range from 200 x 200 to 500 x 500 microm(2) with slice thicknesses ranging between 0.65 and 1.50 mm. This work shows that, besides light installation and low cost, dedicated low-field MR systems are suitable for small rodents imaging, opening this technique even to small research units.

Preclinical evaluation of the atraumatic nature of a spring loaded blunt tip coaxial needle in a swine model.

PURPOSE: To test in vivo in an animal model the inherent atraumatic characteristics of the spring loaded blunt tip of a coaxial needle (Gangi-SoftGuard®, Apriomed, Sweden) against a conventional sharp stylet coaxial needle. MATERIAL AND METHODS: The study was conducted on a 40kg male swine that was its own control for a vascular trauma model. The procedure consisted of voluntary attempts to transfix and traverse the artery/aorta under continuous real-time angiogram. Test and control needles were positioned in the region of the intercostal, superior mesenteric and femoral/deep femoral arteries, and in the aorta. Computed tomography (CT) angiogram was performed post trauma to check for bleeding in the form of extravasation of contrast material. One attempt was performed per site and needle, except for the intercostal artery where a second attempt was done with the test needle, resulting in a total of 4 and 5 tests for the control and test needles, respectively. RESULTS: With the spring loaded blunt tip, no vascular trauma or bleeding was noted in the intercostal, superior mesenteric and femoral arteries, nor in the aorta. Vascular spasm that recovered with time was noted during the second attempt to transfix the same intercostal artery. There were consistent vascular traumas and bleedings with the control needle in all three tested arteries and the aorta, confirmed on angiogram as well as CT angiogram. CONCLUSION: The atraumatic feature offered by the spring loaded blunt tip prevented vascular trauma during the 5 attempts made to transfix the artery/aorta in a swine.

[Eosinophilic esophagitis in children: Evaluation of practices through a multicenter study]. / L'œsophagite à éosinophiles chez l'enfant : évaluation des pratiques.

Eosinophilic esophagitis (EE) is a recent pathology defined by abnormal immune response of the esophageal mucosa to exogenous allergens, leading to chronic mucosa infiltration by 15 eosinophils per High-Power-Field (Eos/HPF). The present retrospective study was designed to assess the hospital care for children suffering from EE in several hospitals in western France in order to highlight discrepancies and improve future care. Twenty-eight children ranging from 1.5 months to 17 years old were included in the study. Episodes of food blockage were the most frequently reported symptoms (46 %). A ratio of 29 % of EE patients reported macroscopically normal endoscopy; diagnosis was then established upon histological anomalies found in biopsies. The mean eosinophil count was 72.4 Eos/HPF. Centralized immunohistochemical staining revealed the presence of IgG4-responding plasma cells in 76.5 % of patients, as well as IgG4 intraepithelial degranulation in 14 % of them. The evaluation of the treatment plan showed important inter-center discrepancies with only 43 % of patients receiving endoscopic reevaluation. This study objectively highlights heterogeneities in diagnosis and care provided to children suffering from EE. Therefore, improving the consistency of practices seems to be crucial to optimize the patients' outcome. The role of IgG4 as a new diagnosis marker remains to be clarified.

MRI-Guided Percutaneous Biopsy of Mediastinal Masses Using a Large Bore Magnet: Technical Feasibility.

OBJECTIVE: To evaluate the diagnostic accuracy and safety of magnetic resonance imaging (MRI)-guided percutaneous biopsy of mediastinal masses performed using a wide-bore high-field scanner. MATERIALS AND METHODS: This is a retrospective study of 16 consecutive patients (8 male, 8 female; mean age 74 years) who underwent MRI-guided core needle biopsy of a mediastinal mass between February 2010 and January 2014. Size and location of lesion, approach taken, time for needle placement, overall duration of procedure, and post-procedural complications were evaluated. Technical success rates and correlation with surgical pathology (where available) were assessed. RESULTS: Target lesions were located in the anterior (n = 13), middle (n = 2), and posterior mediastinum (n = 1), respectively. Mean size was 7.2 cm (range 3.6-11 cm). Average time for needle placement was 9.4 min (range 3-18 min); average duration of entire procedure was 42 min (range 27-62 min). 2-5 core samples were obtained from each lesion (mean 2.6). Technical success rate was 100%, with specimens successfully obtained in all 16 patients. There were no immediate complications. Histopathology revealed malignancy in 12 cases (4 of which were surgically confirmed), benign lesions in 3 cases (1 of which was false negative following surgical resection), and one inconclusive specimen (treated as inaccurate since repeat CT-guided biopsy demonstrated thymic hyperplasia). Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy in our study were 92.3, 100, 100, 66.7, and 87.5%, respectively. CONCLUSION: MRI-guided mediastinal biopsy is a safe procedure with high diagnostic accuracy, which may offer a non-ionizing alternative to CT guidance.

[Knowledge of adolescents with inflammatory bowel disease: Results of a multicenter cross-sectional survey]. / Connaissances des adolescents atteints de maladie inflammatoire chronique intestinale : résultats d'une enquête transversale multicentrique.

AIM: To assess knowledge acquired by adolescents about their inflammatory bowel disease (IBD). METHODS: An anonymous questionnaire was given during consultation to adolescents followed for IBD by pediatricians from 13 hospitals between 1 September 2012 and 1 July 2013. After parental consent, these physicians completed a form at the inclusion of each patient, in which the characteristics of IBD were detailed. The patients mailed back their questionnaire. RESULTS: A total of 124 patients from 12 to 19 years of age were included with a response rate of 82% (all anonymous); 23% of the patients thought that diet was a possible cause of IBD and 22% that one of the targets of their treatment was to cure their disease for good. Of the patients reported having Crohn disease, 46% knew the anoperineal location and 14% knew that Crohn disease can affect the entire digestive tract. Twenty-five percent of the patients were able to name one side effect of azathioprine (88% had already received this treatment), 24% were able to name one side effect of infliximab (54% had already received this treatment), 70% of the adolescents knew that smoking worsens Crohn disease, 68% declared they had learned about their IBD from their pediatrician, and 81% said they would like to receive more information. CONCLUSION: Adolescents with IBD have gaps in their general knowledge and the different treatments of their disease. Their main source of information is their pediatrician, warranting the implementation of customized patient education sessions.

Secondary structure determination of 15N-labelled human Long-[Arg-3]-insulin-like growth factor 1 by multidimensional NMR spectroscopy.

Insulin-like growth factors (IGFs) are a group of proteins that promote cell growth and differentiation. Long-[Arg-3]-IGF-I (Francis et al. (1992) J. Mol. Endocrinol. 8, 213-223), a potent analogue of IGF-I, which has a Glu-3 to Arg-3 substitution and a hydrophobic, thirteen amino acid N-terminal extension, has been studied by 1H,15N NMR spectroscopy. All the backbone 1H and 15N assignments and most of the 1H sidechain assignments have been completed. The secondary structure elements were identified by determining the sequential and medium range NOEs from sensitivity-enhanced 15N-NOESY-HSQC and sensitivity-enhanced 15N-HSQC-NOESY-HSQC spectra. The IGF-I domain of Long-[Arg-3]-IGF-I was found to have an almost identical structure to IGF-I. The N-terminal seven amino acid residues of the extension have very few medium range or long range NOEs but the next five amino acids form a turn-like structure that is spatially close to the beginning of helix 1 in the IGF-I domain. Hydrogen-deuterium exchange experiments show that all the slowly exchanging backbone amide protons in the IGF-I domain are either in the helical or the extended structural elements. Many of the amide protons in the N-terminal extension are also protected from the solvent although the residues in this part of the extension do not have any identifiable secondary structure. The results are interpreted in terms of the increased biological potency of Long-[Arg-3]-IGF-I and the decreased binding to insulin-like growth factor binding proteins.

[Public health professionals' perceptions regarding two dimensions of health promotion: the ecological approach and community participation]. / La perception de professionnels de santé publique face à deux dimensions de la promotion de la santé: approche écologique et participation.

The aim of this paper is to explore public health professionals' perceptions regarding two dimensions of the new health promotion movement: the ecological approach and the principle of community participation. Data were collected by focus-groups of public health professionals (n = 22) in one Public Health Directorate in Québec. Results indicate a fair degree of integration of these two dimensions into the respondents' professional practice. However, limitations related to the work environment and to the theoretical underpinnings of these two components might impede the respondents' ability to integrate them into their practice.

[The interpreter in an intercultural clinical milieu]. / L'interprète en milieu clinique interculturel.

The public's diversified language profile means that nursing practice must adjust to provide the same quality of care to all clients, no matter what language they speak. To improve quality and quantity of information exchanged in the nurse-client-interpreter triangle, the authors have investigated the type of information likely to be filtered and studied the various factors underlying the interpreter's choice to filter information. The authors also analyzed the values interpreters assign to information and the factors that form the background for filtering, including mistrust. The authors suggest adequately preparing interpreters; using interpreters' expertise; and developing an appropriate training program for intercultural interpreters to enable them to better function within health care institutions.

Evaluation of an image-based tracking workflow with Kalman filtering for automatic image plane alignment in interventional MRI.

Recently, a workflow for magnetic resonance (MR) image plane alignment based on tracking in real-time MR images was introduced. The workflow is based on a tracking device composed of 2 resonant micro-coils and a passive marker, and allows for tracking of the passive marker in clinical real-time images and automatic (re-)initialization using the microcoils. As the Kalman filter has proven its benefit as an estimator and predictor, it is well suited for use in tracking applications. In this paper, a Kalman filter is integrated in the previously developed workflow in order to predict position and orientation of the tracking device. Measurement noise covariances of the Kalman filter are dynamically changed in order to take into account that, according to the image plane orientation, only a subset of the 3D pose components is available. The improved tracking performance of the Kalman extended workflow could be quantified in simulation results. Also, a first experiment in the MRI scanner was performed but without quantitative results yet.

Towards a Hall effect magnetic tracking device for MRI.

This paper presents the first prototype of a magnetic tracking device for Magnetic Resonance Imaging. The unique relationship between the space coordinates of a MRI scanner bore and the magnetic field gradients used in MRI allows building a localization system based on an accurate measurement of these gradients. These gradients are measured thanks to a 3D Hall device with a footprint of only 50µm(2), integrated with its specific conditioning circuit in a low cost, low voltage 0.35µm CMOS process. The first experimental results show that a sub-millimeter localization is possible. It opens the way to the development of MRI compatible magnetic tracking systems integrable in a surgical tool.

Evaluation of an image-based tracking workflow using a passive marker and resonant micro-coil fiducials for automatic image plane alignment in interventional MRI.

In this paper, an original workflow is presented for MR image plane alignment based on tracking in real-time MR images. A test device consisting of two resonant micro-coils and a passive marker is proposed for detection using image-based algorithms. Micro-coils allow for automated initialization of the object detection in dedicated low flip angle projection images; then the passive marker is tracked in clinical real-time MR images, with alternation between two oblique orthogonal image planes along the test device axis; in case the passive marker is lost in real-time images, the workflow is reinitialized. The proposed workflow was designed to minimize dedicated acquisition time to a single dedicated acquisition in the ideal case (no reinitialization required). First experiments have shown promising results for test-device tracking precision, with a mean position error of 0.79 mm and a mean orientation error of 0.24°.