Abstract: A method of preparing a characterization zone of an analysis plate to carry out a characterization of a population of a microorganism in the presence of an antimicrobial agent by mass spectrometry using the MALDI technique. The method involves the following steps in succession: a step for providing an analysis plate for a characterization by means of the MALDI technique, the plate including an analysis zone carrying an antimicrobial agent; a step of depositing the population of a microorganism onto said analysis zone in contact with the antimicrobial agent; an incubation step of preserving the analysis plate under conditions and for a sufficient time to allow the antimicrobial agent and the microorganism that is present to interact; and a step of depositing a matrix that is suitable for the MALDI technique onto the analysis zone; associated characterization and functionalization methods, analysis plates and uses.

Abstract: A method of preparing a characterization zone of an analysis plate to carry out a characterization of a population of a microorganism in the presence of an antimicrobial agent by mass spectrometry using the MALDI technique. The method involves the following steps in succession: a step for providing an analysis plate for a characterization by means of the MALDI technique, the plate including an analysis zone carrying an antimicrobial agent; a step of depositing the population of a microorganism onto said analysis zone in contact with the antimicrobial agent; an incubation step of preserving the analysis plate under conditions and for a sufficient time to allow the antimicrobial agent and the microorganism that is present to interact; and a step of depositing a matrix that is suitable for the MALDI technique onto the analysis zone; associated characterization and functionalization methods, analysis plates and uses.