Evidence of the spread of bacteria

螢幕截圖 2016-03-15 11.00.14 螢幕截圖 2016-03-15 11.01.09 p4140200_31

Item no.: P4140200

Principle

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. 

Tasks

Provide evidence concerning the presence of microorganisms

  1. in the air.
  2. on objetcs of dailys use.
  3. of microorganisms on the skin.
  4. of microogranisms on insects.

What you can learn about

  • Disinfection
  • Nutrient agar
  • Sterility