(meth-en'ă-mēn sĭl'vĕr),
A hexamethylenetetramine-silver complex prepared by adding silver nitrate to methenamine; a white precipitate, which dissolves upon shaking and is stable under refrigeration, appears in the solution; used in various histological and histochemical staining methods.
See also: Gomori methenamine-silver stain.
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The histochemical stain results for acid-fast bacilli (Ziehl-Neelsen) and fungi (Gomori methenamine-silver stain) were likewise negative.
Tissues were sectioned in 5-[micro]n slices and were subsequently stained with hematoxylin and eosin, Gram's, Ziehl-Neelsen, periodic acid--Schiff, and Grocott methenamine-silver techniques.
Ziehl-Neelsen and Brown and Brenn stains were again non-contributory, but a Grocott-Gomori methenamine-silver stain (Fig.
Stains for acid-fast bacilli with Grocott-Gomori methenamine-silver nitrate were negative.
4) The organisms are readily apparent with the use of special histochemical stains, such as Gridley fungus stain, periodic acid-Schiff (with or without diastase), and Gomori methenamine-silver stain (Figure 3).
Grocott methenamine-silver and acid-fast stains were negative for fungal and mycobacterial organisms, respectively.
Microcrystalline cellulose, on the other hand, retains the staining properties of native wood cellulose and can be highlighted by periodic acid-Schiff (with or without diastase), Congo-red (without apple-green birefringence), and Gomori methenamine-silver stains.
Two histologic stains--periodic acid-Schiff (PAS) and Grocott-Gomori methenamine-silver stains--were used to visualize the tissue and the fungal pathogen.
They stained positively with periodic acid-Schiff (Figure 4) and Grocott-Gomori methenamine-silver stain (Figure 5).
Four-micrometer cross sections of tissue were stained with hematoxylineosin and Gomori methenamine-silver.
Fite and Gomori methenamine-silver stains were negative for acid-fast and fungal organisms.
Special stains, including Fite, Ziehl-Neelsen, and Gomori methenamine-silver stains, were negative.