Ziehl-Neelsen stain

It is also known as the acid-fast stain and was first described by two German doctors Ziehl and Neelsen. It is a special bacteriological stain used to identify acid-fast Mycobacteria. Mycobacterium tuberculosis is the most important of this group, as it is responsible for tuberculosis (TB). It can also be used to stain other bacteria such as Nocardia.

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