Abstract
Mass spectrometry (MS) is an analytical technique that allows samples to be characterized by measuring the masses (strictly speaking their mass-to-charge ratio) of the component molecules. This technique has been used for more than one hundred years and technological development throughout this time has broadened its scope from isotopes to small molecules, more complex organic molecules, and in the last few decades, macromolecules (nucleic acids and proteins). MALDI-TOF (matrix-assisted laser desorption ionization time-of-flight) MS is a variant that allows analysis of complex mixtures of proteins and has recently been applied to the identification of cultured microorganisms, making it a rapid and effective tool for microbiological diagnosis. In a short time, MALDI-TOF MS has become a routinely used technique in many clinical microbiology services and its strong impact is prompting the development of new applications in the field of clinical microbiology.
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