University Experiment
Evidence of the spread of bacteria
Article No: P4140200
Microorganisms are ubiquitous, i.e. they are present everywhere around us. This fact can be proved by touching the objects that are to be examined in view of the presence of microorganisms against the sterile nutrient medium in a Petri dish and by incubating the plates afterwards. The easy working methods that are to be applied for this purpose are described based on the following examples. Benefits Experiment teaches all essential work techniques of microbiology. Complementary experiment available which uses these work techniques. Tasks Provide evidence concerning the presence of microorganisms in the air on objects of daily use on the skin on insects Learning objectives Disinfection Nutrient agar Sterility