Acid-fast and non-acid-fast bacteria stained with Ziehl-Neelsen. Acid-fast bacteria under the microscope. Mycobacterium and staphylococcus stained with Ziehl-Neelsen stain. Appearance under the microscope.

Ziehl-Neelsen stain, Z-N staining technique

Mycobacterium sp. and Staphylococcus aureus. Ziehl-Neelsen stain (counterstained with malachite green).