Research for infection protection


Unicellular microorganisms with spherical (cocci), rod-like (rods) or corkscrew-like (spirals) shapes. Additionally, bacteria are distinguished by their physiological-biochemical characteristics, for example: 

  • their relation to oxygen,
  • their dependency on temperature and pH value,
  • their need for nutrients,
  • and their staining (Gram-positiveGram-negative

As the do not have a cell nucleus, their DNA is located in the cytoplasm. Hence, bacteria belong to the group of prokaryotes (Greek “before nucleus”).

Diagram of a Bacterium