Method and system for detecting an analyte present in a liquid specimen

A system for detecting an analyte present in a liquid specimen, comprising:

• a medium equipped with a fluidic circuit, said fluidic circuit comprising at least one injection channel and a detection chamber into which said injection channel opens, said detection chamber having a non-zero volume enclosing polymeric beads covered with a reagent suitable for said analyte to be detected,
• a preparing device for preparing the liquid specimen to be analyzed, said medium being fitted on said preparing device, said preparing device comprising a coring implement for coring a sample of material and a dissolving or re-suspending implement for dissolving or re-suspending each core produced by said coring implement, said injection channel of the fluidic circuit being connected to said dissolving or re-suspending implement,
• an optical read-out device, comprising an image sensor arranged to acquire an image of at least one region of the detection chamber, and
• a processing unit configured to process the image acquired by the image sensor, comprising a module for determining a texture level of each acquired image and a module for determining a concentration of said analyte depending on the texture level determined for each image, said texture level depending on an agglutination level of the polymeric beads in the detection chamber in the presence of the analyte.