A method of automatically analyzing and interpreting an antibiogram of a sample of a microorganism for analysis, preferably a bacterium, the method serving to determine a phenotype of resistance or sensitivity to at least one antimicrobial compound, preferably to a plurality of antimicrobial compounds, preferably antibiotic compounds, said phenotype being selected from a plurality of different reference phenotypes for each of the reference species of microorganism in a plurality of different species of reference microorganisms, wherein: a) the antibiogram of the sample of the microorganism for analysis, preferably belonging to one of said species of reference microorganisms, is prepared using a determined methodology on a solid culture medium, which methodology comprises: ▪ a determined concentration of microorganism, preferably of bacterium (CFU/mL), of the sample of microorganism, preferably of bacterium, deposited on said solid culture medium; ▪ a determined number n of a plurality of substrates deposited on said solid culture medium, the substrates being in a determined arrangement and of a determined form, preferably in the form of wafers, each containing a determined concentration of determined antimicrobial compound(s) and suitable for diffusing one or more different determined antimicrobial compounds for each of the n said substrates; and ▪ determined conditions and determined duration of incubation of the sample of microorganism deposited on said solid culture medium under, preferably 18 h to 24 h at a temperature in the range 35°C to 37°C; and b) acquiring a photographic image of the antibiogram obtained in step a), preferably using a photographic image capture apparatus comprising a scanner and camera; and c) determining said phenotype of the sample of microorganism for analysis, preferably of bacterium, by using image recognition software to compare the photographic image obtained in step b) with reference images of reference antibiograms in a database made up of said reference images, such that said database comprises a plurality of at least p different reference images of antibiograms of p different strains of the same microorganism for each reference phenotype of each reference species of microorganism. a) the antibiogram of the sample of the microorganism for analysis, preferably belonging to one of said species of reference microorganisms, is prepared using a determined methodology on a solid culture medium, which methodology comprises: ▪ a determined concentration of microorganism, preferably of bacterium (CFU/mL), of the sample of microorganism, preferably of bacterium, deposited on said solid culture medium; ▪ a determined number n of a plurality of substrates deposited on said solid culture medium, the substrates being in a determined arrangement and of a determined form, preferably in the form of wafers, each containing a determined concentration of determined antimicrobial compound(s) and suitable for diffusing one or more different determined antimicrobial compounds for each of the n said substrates; and ▪ determined conditions and determined duration of incubation of the sample of microorganism deposited on said solid culture medium under, preferably 18 h to 24 h at a temperature in the range 35°C to 37°C; and ▪ a determined concentration of microorganism, preferably of bacterium (CFU/mL), of the sample of microorganism, preferably of bacterium, deposited on said solid culture medium; ▪ a determined number n of a plurality of substrates deposited on said solid culture medium, the substrates being in a determined arrangement and of a determined form, preferably in the form of wafers, each containing a determined concentration of determined antimicrobial compound(s) and suitable for diffusing one or more different determined antimicrobial compounds for each of the n said substrates; and ▪ determined conditions and determined duration of incubation of the sample of microorganism deposited on said solid culture medium under, preferably 18 h to 24 h at a temperature in the range 35°C to 37°C; and b) acquiring a photographic image of the antibiogram obtained in step a), preferably using a photographic image capture apparatus comprising a scanner and camera; and c) determining said phenotype of the sample of microorganism for analysis, preferably of bacterium, by using image recognition software to compare the photographic image obtained in step b) with reference images of reference antibiograms in a database made up of said reference images, such that said database comprises a plurality of at least p different reference images of antibiograms of p different strains of the same microorganism for each reference phenotype of each reference species of microorganism.