28 research outputs found

    Paroxysmal strabismus and stridor acquired in childhood: Do not overlook calcemia!

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    International audienceHypocalcemia is known to induce stridor but was rarely reported to cause strabismus. We report the case of a 4-year-old girl who presented with paroxysmal stridor and strabismus with diplopia, persisting for several weeks. Severe hypocalcemia (1.25 mmol/L) was finally diagnosed and was related to hypoparathyroidism, which was the first manifestation of autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) in this patient. Strabismus and stridor both resolved after normalization of calcemia. This case report is a rare observation of paroxysmal strabismus caused by hypocalcemia and it highlights the importance of calcium monitoring in any situation of atypical neurological symptoms

    Description and performance of the CERN Spiral Reader (L.S.D.)

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    We give an algorithm that, for an elliptic curve E over Q−− in Weierstraß form, computes the infimum and supremum of the difference between the naïve and canonical height functions on E(Q−−)

    MiCODetect : vers le cahier des charges d’un Capteur Optique de DĂ©tection prĂ©symptomatique de Septoria tritici pour la lutte intĂ©grĂ©e contre la septoriose du blĂ©

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    Ce volume rassemble l'ensemble des travaux de recherche conduits dans le cadre des appels Ă  projets soutenus par le plan Ecophyto, et prĂ©sentĂ©s Ă  l'occasion du colloque Ecophyto Recherche des 13 et 14 octobre 2015National audienceSeptoria tritici blotch (STB) caused by the fungus Zymoseptoria tritici is the most important disease in wheat, and the first contributor to fungicide use in France and Europe. Adjusting sprayings to the specific requirements of the crop can lead to significant reductions in fungicide use without compromising yield. It has been shown that presymptomatic quantification of the pathogen could be key to achieve this. We hypothesized that the production of fluorescent secondary metabolites by the infected wheat crop could be used as biomarkers of the transition to necrotrophy, to quantify the pathogen, via an adapted sensor. We set up a metabolomic and transcriptomic screening of the wheatseptoria interaction and identified different upregulated metabolic pathways. Specifically, three metabolites from the tryptophan pathway are produced during infection, and emit UV-UV fluorescence. In the field, these metabolites are predictive of ulterior symptom dynamics, and modify the UV-UV spectrum of wheat leaves. Additional experiments will be necessary to determine which emission wavelengths are the most predictive, and to assess how specific and robust this fluorescence is.La septoriose provoquĂ©e par le champignon phytopathogĂšne Zymoseptoria tritici est la 1Ăšre maladie contributrice aux traitements fongicides sur blĂ© en France et en Europe. Le raisonnement de son traitement au plus proche des besoins rĂ©els peut apporter des Ă©conomies significatives de produit sans perte de performance technique. Pour cela, la quantification du champignon pendant sa phase asymptomatique d’incubation a Ă©tĂ© identifiĂ©e comme un point clef. Nous faisons l’hypothĂšse que des mĂ©tabolites secondaires fluorescents produits par la plante en rĂ©ponse Ă  l’infection, servant de biomarqueurs de la transition biotrophie-nĂ©crotrophie pourraient ĂȘtre quantifiĂ©s par un capteur ad hoc. Nous avons mis en place un protocole d’analyse mĂ©tabolomique et transcriptomique de l’interaction blĂ©- septoriose, et identifiĂ© plusieurs voies mĂ©taboliques induites. En particulier, trois mĂ©tabolites secondaires issus de la voie du tryptophane sont produits lors de l’infection, et Ă©mettent une fluorescence dans l'ultra-violet (UV-UV). Au champ, la production de ces mĂ©tabolites s’avĂšre effectivement prĂ©dictive du dĂ©veloppement ultĂ©rieur des symptĂŽmes, et modifie le spectre UV-UV des feuilles de blĂ©. Des expĂ©rimentations complĂ©mentaires sont Ă  effectuer pour prĂ©ciser les longueurs d’onde d’émission les plus prĂ©dictives et Ă©tablir le degrĂ© de spĂ©cificitĂ© et de robustesse de ce signal fluorescent
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