methenamine silver stain

methenamine silver stain

a stain used for cysts of Pneumocystis carinii.

meth·e·na·mine sil·ver stain

(me-then'ă-mēn sil'vĕr stān) A stain primarily used for cysts of Pneumocystis jiroveci (formerly P. carinii), but valid for other pathogens (e.g., fungi, helminths).