The present invention relates to pan-genomes of bacterial species that are stable with regard to their core genome and the addition of new genes, their uses, as well as a data base containing these pan-genomes, a method of determining an antimicrobial drug profile using a pan-genome, a method of determining an infection of a patient and a method of selecting a treatment of a patient using a pan-genome, and a computer program product for carrying out the methods.
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