Résumé Des isolats marocains de Pyricularia grisea (Magnaporthe grisea) originaire d’Oryza sativa et de Stenotaphrum secundatum ont été croisés avec des isolats standard fertiles (signe sexuel Mat 1.1 et Mat 1.2) par l’utilisation de la méthode de culture de trois points sur milieu avoine. Les résultats obtenus ont montré que les isolats du riz sont de signe sexuel Mat 1.1 et peuvent être considérés comme des isolats mâles, alors que les isolats originaires de S. secundatum ne sont ni de signe Mat 1.1 ni de signe Mat 1.2. Les inoculations croisées ont montré que les isolats de P. grisea originaires de S. secundatum sont pathogènes sur certaines variétés du riz. De même, S. secudatum s'est montré sensible à certains isolats originaires du riz.

The use of medical devices (MDs) in the field of medical imaging has always been governed by rigorous regulations, in particular the authorizations and compliance of radiological installations and premises in view of the risks generated by the ionizing radiation produced by these MDs. The regulatory bases that deal with equipment emitting ionizing radiation are diversified between those specific to the protection of the public and users of ionizing radiation and those relating to medical devices. In addition, radio-diagnostic equipment must provide all the guarantees in terms of the balance between benefits and risks. Although radiation protection is essential, materiovigilance is one of the key elements of technological monitoring and surveillance of the risks that may result from the use of these medical devices after they have been placed on the market. The Moroccan legislation has a legal arsenal in accordance with the model of the World Health Organization’s global regulatory framework for medical devices. It outlines regulations and adheres to international guidelines in the field of vigilance against ionizing radiation. However, it is necessary to move on to the specification of procedures in order to remove any ambiguity.

Given the importance of medical devices in improving health, a system of monitoring their use is necessary to ensure an acceptable benefit/risk ratio. The present study focuses on the post-marketing monitoring system, of which the aimis to develop, a national strategy for the establishment of a multidimensional vigilance system to monitor medical devices in Morocco. Methods : The study is based on a systemic review selected by the PRISMA method for the period between [2011-2021] and on the Scopus, Pubmed, Science direct and Web of science databases. Results: A preliminary analysis of the data identified some challenges such as under-reporting and lack of standardization of adverse reaction coding, standard nomenclature problem for international trade, lack of clarity of requirements for manufacturers, and insufficient regulation and significant incentives for the use of unique device identifiers. Recommendations for a more effective national system are put for ward which address the regulation and computerization of the system for the development of medical devices monitoring mechanisms.