Performances zootechniques du poulet de chair soumis à un régime à base de résidus de semoule de manioc supplémenté par la spiruline (Spirulina platensis)

Cette étude a été réalisée pour évaluer les performances zootechniques d’un régime alimentaire à base de résidus de semoule de manioc supplémentés par la spiruline chez les poulets de chair. Trois (03) groupes de poussins de souche Arbor Acres soumis aux rations témoins supplémentées ou non par la spiruline ont été comparés à neuf (09) autres groupes soumis aux rations dans lesquelles le maïs a été substitué par les résidus de semoule de manioc aux taux de 50, 75, et 100% et supplémentés par 0,5 ou 1% de spiruline. Les principaux résultats ont montré que tous les paramètres de croissance se détériorent avec le taux croissant d’incorporation de résidus de semoule de manioc supplémentés ou non par la spiruline. L’indice de consommation a augmenté de l’ordre de 10; 10 et 15% respectivement avec 50, 75 et 100% de substitution du maïs dans la ration. Le rendement carcasse, le poids relatif de la tête, des pattes, du foie, du coeur, du pancréas et de la graisse abdominale évolue en dents de scie d’un traitement à l’autre. Les résidus de semoule de manioc peuvent avantageusement être supplémentés par la spiruline au taux de 0,5% dans l’aliment des poulets de chair.© 2015 International Formulae Group. All rights reserved.Mots clés: Maïs, manioc, poulets de chair, spirulineEnglish Title:  Zootechnical performances of broiler chickens fed on Spirulina platensis-supplemented cassava root waste based dietEnglish AbstractThis study investigated the growth performances of broiler chickens fed on spirulina-supplemented cassava root waste based diet. Three (03) groups of Abor Acres chicks fed on control diets supplemented or not with spirulina were compared to nine (09) other groups fed on diets in which 50, 75 and 100% of maize were replaced by cassava root waste supplemented or not with 0.5 and 1% spirulina in a completely randomized design. Results revealed that growth parameters including feed intake, weight gain and feed conversion ratio  (FCR) depressed with increasing level of cassava root waste in the diet. FCR was poorer by 10, 10 and 15% respectively with 50, 75 and 100% of maize replaced with cassava root waste. Nevertheless, supplementing with spirulina, irrespective to the level of cassava root waste inclusion, demonstrated a production advantage. Carcass yield and relative weight of organs varied from one experimental diet to another. In conclusion, cassava root waste can be beneficially supplemented with spirulina at 0.5% in broiler diets.© 2015 International Formulae Group. All rights reserved.Keywords: Broiler chickens, cassava, maize, spirulin

Motion-preserving technologies for degenerative lumbar spine: The past, present, and future horizons

Over the past few decades, remarkable advancements in the understanding of the origin of low-back pain and lumbar spinal disorders have been achieved. Spinal fusion is generally considered the “gold standard” in the treatment of low-back pain; however, fusion is also associated with accelerated degeneration of adjacent levels. Spinal arthroplasty and dynamic stabilization technologies, as well as the continuous improvement in diagnosis and surgical interventions, have opened a new era of treatment options. Recent advancements in nonfusion technologies such as motion-preservation devices and posterior dynamic stabilization may change the gold standard. These devices are designed with the intent to provide stabilization and eliminate pain while preserving motion of the functional spinal unit. The adaption of nonfusion technologies by the surgical community and payers for the treatment of degenerative spinal conditions will depend on the long-term clinical outcome of controlled randomized clinical studies. Although the development of nonfusion technology has just started and the adoption is very slow, it may be considered a viable option for motion preservation in coming years. This review article provides technical and surgical views from the past and from the present, as well as a glance at the future endeavors and challenges in instrumentation development for lumbar spinal disorders. © 2011 SAS - The International Society for the Advancement of Spine Surgery. Published by Elsevier Inc. All rights reserved

Pharmacokinetics in vivo and pharmacodynamics ex vivo/in vitro of meropenem and cefpirome in the Yucatan micropig model: continuous infusion versus intermittent injection

ObjectiveTo investigate the pharmacodynamic disposition of two recently developed β-lactam antibiotics, meropenem and cefpirome, in the Yucatan micropig model, and to compare the bactericidal activity of these drugs against bacteria in this in vitro/ex vivo micropig model after administration by both intermittent injection and continuous infusion.MethodsCefpirome (1 g) was given to the micropig over a 12-h period by direct intravenous injection and 6-h continuous infusion (500 mg). Meropenem (250 mg) was administered either by 30-min intravenous and 8-h continuous infusion. The two drugs were assayed by HPLC. The pharmacodynamics of these drugs were evaluated by means of (1) serum killing curve against Klebsiella pneumoniae producing extended-spectrum β-lactamase, stably derepressed Enterobacter cloacae and methicillin-susceptible penicillinase-producing Staphylococcus aureus, and (2) calculations of index of surviving bacteria (ISB).ResultsThe bactericidal activity of meropenem against K. pneumoniae and E. cloacae in this in vitro/ex vivo model was excellent, with a 4 log decrease at peak concentrations. Meropenem produced a mixed concentration- and time-dependent, killing effect against E. cloacae and K. pneumoniae. The ISB value ranged from 25% to 30% for E. cloacae. With concentrations above MIC for S. aureus (1 mg/L), cefpirome has a time-dependent bactericidal activity, as shown by the ISB ranging from 20% to 80% after 4 h and between 20% and 40% after an 8-h drug exposure. For both antibiotics, the higher concentrations obtained just after intermittent injection had a rapid and strong killing effect against the strains tested, but the trough levels had no bactericidal activity. The continuous infusions produce consistent concentrations of antibiotic that can be maintained above the MIC, and the bactericidal activity of which ranges from 2 to 4 log10 decrease of inoculum.ConclusionsIn the present study the micropig has been shown to be an adequate model for the pharmacodynamic investigation of cefpirome and meropenem. In general, continuous infusion appears to optimize the pharmacodynamic profile of the two tested β-lactam antibiotics. However, against Gram-negative bacilli, the administration of a loading dose prior to continuous infusion of β-lactams would eliminate the only potential pharmacokinetic disadvantage of continuous infusion and ensure the rapid onset of antimicrobial activity

Multisubstituted pyrimidines effectively inhibit bacterial growth and biofilm formation of Staphylococcus aureus

Biofilms are multicellular communities of microorganisms that generally attach to surfaces in a self-produced matrix. Unlike planktonic cells, biofilms can withstand conventional antibiotics, causing significant challenges in the healthcare system. Currently, new chemical entities are urgently needed to develop novel anti-biofilm agents. In this study, we designed and synthesized a set of 2,4,5,6-tetrasubstituted pyrimidines and assessed their antibacterial activity against planktonic cells and biofilms formed by Staphylococcus aureus. Compounds 9e, 10d, and 10e displayed potent activity for inhibiting the onset of biofilm formation as well as for killing pre-formed biofilms of S. aureus ATCC 25923 and Newman strains, with half-maximal inhibitory concentration (IC50) values ranging from 11.6 to 62.0 mu M. These pyrimidines, at 100 mu M, not only decreased the number of viable bacteria within the pre-formed biofilm by 2-3 log(10) but also reduced the amount of total biomass by 30-50%. Furthermore, these compounds were effective against planktonic cells with minimum inhibitory concentration (MIC) values lower than 60 mu M for both staphylococcal strains. Compound 10d inhibited the growth of S. aureus ATCC 25923 in a concentration-dependent manner and displayed a bactericidal anti-staphylococcal activity. Taken together, our study highlights the value of multisubstituted pyrimidines to develop novel anti-biofilm agents.Peer reviewe

GamiFIN Conference 2020

In this study, we investigate how users’ general gaming preferences (i.e. on dimensions of achievement, immersion and social orientations) are related to their perception of the (enjoyment, usefulness, ethicalness motivationability and continued use) of different gamification features. The study was amongst 144 students as a vignette study, framed in the context of gamification of the Moodle educational platform. The results show that, while achievement–orientation in gaming preferences is positively associated with perceptions of achievement–related gamification features, immersion and social gaming orientations had little, if any, positive associations with the different perceptions related to gamification features. While the results indicate that achievement-related gamification may be preferred by achievement-oriented players, overall players’ gaming preferences types may not be a comprehensive predictor for gamification preferences.</p

Activity of highly dispersed Co/SBA-15 catalysts (low content) in carbon black oxidation

Peer reviewedPublisher PD

The Taste of Waste: The Edge of Eggshell Over Calcium Carbonate in Acrylonitrile Butadiene Rubber

Rubber technology experiences a new age by the use of biowaste or natural fillers. In this regard, taking properties of reinforcing agents from biowaste fillers remains as the challenging matter. Chicken eggshell (ES) biowaste has recently been introduced to substitute calcium carbonate (CaCO3) duo to its superior properties and low price. In this work, composites based on acrylonitrile butadiene rubber (NBR) reinforced with ES and CaCO3 microfillers at various loading levels were prepared and characterized. To improve the interactions between fillers and the NBR matrix, ES and CaCO3 were surface-functionalized using a terpolymer, namely poly(vinyl 2-pyrrolidone-co-maleic acid-co-acrylic acid). Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) were used to characterize the modified fillers. The incorporation of the functionalized fillers resulted in a significant rise in the maximum torque according to the rheometric measurements. The Young’s modulus of the ES-based and CaCO3-based compounds showed a mild improvement over a wide range of filler contents. The elongation at break of the NBR composites, however, was dependent on the filler content. This work provides exciting opportunities for the design of novel and innovative coupling agents to be used in rubber applications. © 2019, The Author(s)

Health financing reform in Kenya- assessing the social health insurance proposal

Kenya has had a history of health financing policy changes since its   independence in 1963. Recently, significant preparatory work was done on a new Social Health Insurance Law that, if accepted, would lead to universal health coverage in Kenya after a tr&amp;nsition period. Questions of economic  feasibility and political acceptability continue to be discussed, with   stakeholders voicing concerns on design features of the new proposal   submitted to the  Kenyan parliament in 2004. For economic, social, political and organisational reasons a transition period will be  necessary, which is likely to last more than a decade. However, important objectives such as access to health care  and avoiding impoverishment due to direct health care payments should be recognised from the start so that  steady progress towards effective universal coverage can be planned and achieved

Antimicrobial resistance among migrants in Europe: a systematic review and meta-analysis

BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings. METHODS: For this systematic review and meta-analysis, we searched MEDLINE, Embase, PubMed, and Scopus with no language restrictions from Jan 1, 2000, to Jan 18, 2017, for primary data from observational studies reporting antibacterial resistance in common bacterial pathogens among migrants to 21 European Union-15 and European Economic Area countries. To be eligible for inclusion, studies had to report data on carriage or infection with laboratory-confirmed antibiotic-resistant organisms in migrant populations. We extracted data from eligible studies and assessed quality using piloted, standardised forms. We did not examine drug resistance in tuberculosis and excluded articles solely reporting on this parameter. We also excluded articles in which migrant status was determined by ethnicity, country of birth of participants' parents, or was not defined, and articles in which data were not disaggregated by migrant status. Outcomes were carriage of or infection with antibiotic-resistant organisms. We used random-effects models to calculate the pooled prevalence of each outcome. The study protocol is registered with PROSPERO, number CRD42016043681. FINDINGS: We identified 2274 articles, of which 23 observational studies reporting on antibiotic resistance in 2319 migrants were included. The pooled prevalence of any AMR carriage or AMR infection in migrants was 25·4% (95% CI 19·1-31·8; I2 =98%), including meticillin-resistant Staphylococcus aureus (7·8%, 4·8-10·7; I2 =92%) and antibiotic-resistant Gram-negative bacteria (27·2%, 17·6-36·8; I2 =94%). The pooled prevalence of any AMR carriage or infection was higher in refugees and asylum seekers (33·0%, 18·3-47·6; I2 =98%) than in other migrant groups (6·6%, 1·8-11·3; I2 =92%). The pooled prevalence of antibiotic-resistant organisms was slightly higher in high-migrant community settings (33·1%, 11·1-55·1; I2 =96%) than in migrants in hospitals (24·3%, 16·1-32·6; I2 =98%). We did not find evidence of high rates of transmission of AMR from migrant to host populations. INTERPRETATION: Migrants are exposed to conditions favouring the emergence of drug resistance during transit and in host countries in Europe. Increased antibiotic resistance among refugees and asylum seekers and in high-migrant community settings (such as refugee camps and detention facilities) highlights the need for improved living conditions, access to health care, and initiatives to facilitate detection of and appropriate high-quality treatment for antibiotic-resistant infections during transit and in host countries. Protocols for the prevention and control of infection and for antibiotic surveillance need to be integrated in all aspects of health care, which should be accessible for all migrant groups, and should target determinants of AMR before, during, and after migration. FUNDING: UK National Institute for Health Research Imperial Biomedical Research Centre, Imperial College Healthcare Charity, the Wellcome Trust, and UK National Institute for Health Research Health Protection Research Unit in Healthcare-associated Infections and Antimictobial Resistance at Imperial College London

Forgotten Plotlanders: Learning from the survival of lost informal housing in the UK.

Colin Ward’s discourses on the arcadian landscape of ‘plotlander’ housing are unique documentations of the anarchistic birth, life, and death of the last informal housing communities in the UK. Today the forgotten history of ‘plotlander’ housing documented by Ward can be re-read in the context of both the apparently never-ending ‘housing crisis’ in the UK, and the increasing awareness of the potential value of learning from comparable informal housing from the Global South. This papers observations of a previously unknown and forgotten plotlander site offers a chance to begin a new conversation regarding the positive potential of informal and alternative housing models in the UK and wider Westernised world