Medical Term:

Ziehl-Neelsen stain

Pronunciation: zēl nāl′sen

Definition: a method for staining acid-fast bacteria using Ziehl stain, decolorizing in acid alcohol, and counterstaining with methylene blue; acid-fast organisms appear red, other tissue elements light blue; a modification of this stain is also used for Actinomycetes and Brucella.

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