Macchiavello stain


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Macchiavello stain

[‚mäk·ē·ə′vel·ō ‚stān]
(microbiology)
A differential staining procedure for rickettsiae, in which the fixed tissue smear is stained with basic fuchsin, differentiated with a 0.5% solution of citric acid, and counterstained with a 1% solution of methylene blue, rickettsiae stain red, and tissue cells stain blue.