Mycobacteria are common in the nature, as in watercourses, the ground or in animals that are germ carriers. Mycobacteria are characterized by a thick, hydrophobic and waxy cell wall. Some Mycobacteria have a slow growth.
The microbiological testing is done through microscope with a Ziehl-Neesen staining (acid-fast) and through cultur media (e.g. media which contains eggs for mycobacterium tuberculosis).
