Mesophilic are organisms developed in the medium temperature (20-40 ° C):
Depending on the requirement for oxygen, organisms are divided into aerobic and anaerobic ones.
Anaerobic microorganisms live without oxygen. They can exist in such products which are packaged tightly or in the absence of air. Salmonella and botulinum inoculum (Clostridium Botulinum) are examples of anaerobic organisms: