Abstract: A method for analysing a biological sample by means of an analysis instrument, the sample including biological agents and being arranged in an analysis receptacle in view of a holographic imaging system, the method including: acquiring a holographic image of the sample, the holographic image associating an intensity value with each pixel, determining, from the image acquired, an image mask which associates an active or inactive state with each pixel in accordance with the intensity values so that an inactive state is associated with pixels which correspond to artefacts caused by elements present in the field of view other than biological agents, determining a value of at least one biomass parameter which represents the quantitative spatial distribution of biological agents in the field of view, using only the pixels of the holographic image having an active state, and supplying the value of the biomass parameter from the analysis results.

Abstract: A detection of the Gram type of a bacterial strain includes: illumination, in the wavelength range 415 nm-440 nm, of at least one bacterium of said strain having a natural electromagnetic response in said range; acquisition, in the range 415 nm-440 nm, of a light intensity reflected by, or transmitted through, said illuminated bacterium; and determination of the Gram type of the bacterial strain as a function of the light intensity acquired in the range 415 nm-440 nm.

Abstract: A method and a system for determining the presence of at least one determined microorganism in a Petri dish comprising one or more colonies of microorganisms and a culture medium, and a computer program product which, when executed, allows the method of the invention to be performed.

Abstract: A method and a system for determining the presence of at least one determined microorganism in a Petri dish comprising one or more colonies of microorganisms and a culture medium, and a computer program product which, when executed, allows the method of the invention to be performed.