Abstract: Methods for supplying a foodstuff sample for microbiological testing comprise supplying the sample in a plastic bag, adding physiological nutrient solution to the sample in a specified weight ratio, mechanically comminuting and homogenizing the contents of the bag, and removing a partial quantity of the contents of the bag by means of pipette via a filter as sample liquid. The methods further comprise injecting the same liquid onto at least one nutrient medium situated in a petri dish and inserting the injected petri dish into an incubator. In the communution and homogenization of the contents of the bag, the bag is clamped shut and pressed between a fixed jaw and two jaws which oscillate alternately. In the injection of the nutrient medium, the sample liquid is injected in a spiral shape onto the nutrient medium. Additionally, a laboratory robot system is employed.