The present invention relates to a method for detecting and/or identifying bacteria present in a liquid or solid sample, characterized in that: a. the sample that may contain said bacteria is placed in a liquid culture medium, in a first container, b. a second container comprising at least one system for detecting said bacteria is provided, c. a means of transfer between the first container and the second container is provided, d. a temperature T1 is applied inside the second container, then e. a temperature T2 is applied inside the second container, f. the temperature T1 is higher than the temperature T2 such that a defined volume of culture medium is transferred from the first container to the second container, g. the presence or absence of bacteria is determined and/or the bacteria are identified within the detection system.