Abstract: It is based on an apparatus (1) forming a closed chamber (2) inside of which is installed an upper centered digital camera (15) oriented toward a removable support (17) over which is placed either a panel fitted with receptacles for holding the liquid culture mediums or a plate for placing on it a solid culture medium, the support (17) being located between lower lighting means (18) and upper lateral lighting means (19) complemented with light diffusers (20) and (21). The apparatus includes external operation indicators, switches, outlets and connections providing for appropriate operation and control through a central computer. The system captures and interprets the images produced by the reactions taking place in said culture mediums, either liquid or solid, allowing the bacterial reactions to be converted into values, in addition to analyzing microorganism growth.