methenamine silver stain

methenamine silver stain

a stain used for cysts of Pneumocystis carinii.

methenamine silver stain

a specialized stain consisting of methenamine and silver nitrate used in histological examinations for the detection of fungi. This stain is the best for detecting fungi in specimens but is very time consuming and mainly used in histology labs.

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).
References in periodicals archive ?
Interface changes are typically lacking, and special stains for fungi (Gomori-Grocott methenamine silver stain, periodic acid-Schiff) and tissue cultures will demonstrate organisms.
Histochemically, actinomycete filaments were colored deep bluish-purple with tissue Gram stain and deep Brown with Gomori Methenamine silver stain (Fig.
Methenamine silver stain showed numerous yeasts measuring approximately 4 to 10 [micro]m (Fig.
Although the patient in our case was not known to have AIDS at the time of diagnosis, the microscopic findings of the granular, frothy, pink material and associated granulomatous feature prompted a test with Grocott methenamine silver stain.
The acidfast stain for mycobacteria and the Gomori methenamine silver stain were negative.
Gomori methenamine silver stain, Gram stain, and modified acid-fast Fite stain (Figure 3, oil immersion, original magnification x1000) revealed the presence of gram-positive, branching, filamentous, beaded bacteria morphologically diagnostic of Nocardia species.
Gomori methenamine silver stain demonstrated budding yeasts compatible with H.
Grocott methenamine silver stain was negative for fungus, and Ziehl-Neelsen stain was negative for acid-fast bacilli.
They may stain weakly with hematoxylin-eosin, but are often positive for methenamine silver stain.
No bacterial or fungal agents were seen by light microscopy of specimens stained with hematoxylin and eosin, Giemsa, Warthin-Starry, Brown and Brenn, or Gomori methenamine silver stains or in a Wright-Giemsa-stained cytologic preparation of a joint aspirate.
Periodic acid-Schiff and Gomori's methenamine silver stains were negative for fungi, but the overall appearance was compatible with a fungal infection.
Fungal elements highlighted with periodic acid-Schiff and Gomori methenamine silver stains showed double-contoured cell walls surrounding a cytoplasmic mass and proliferation in the form of broad-based buds.