Caught Red Handed- Congo Staining in the Oropharynx
نویسندگان
چکیده
منابع مشابه
Detection of cellulolytic fungi by using Congo red as an indicator: a comparative study with the dinitrosalicyclic acid reagent method
Cellulolytic fungi can easily be screened within 2 d for the production of cellulolytic enzymes by staining with Congo red, or by measuring the amount of reducing sugar (glucose) produced with the dinitrosalicyclic acid reagent method. Endoglucanase activity is visible in carboxymethyl cellulose agar plates after staining with Congo red, and fixing with HCI or NaOH. This method is essentially b...
متن کاملThe congo red stain revisited.
The Congo red stain has undergone several modifications since it was first used by Bennhold in 1922 in order to increase the specificity for staining amyloid. Most of the laboratories in the United States use the method of Puchtler which uses alkaline Congo red solution. Some of the variables associated with the procedure were investigated by us. Our results showed the following: (1) amyloid sh...
متن کاملA n evaluation of current methods for the diagnostic histochemistry of amyloid.
Six current histological methods for demonstrating amyloid (crystal violet, thioflavine-T fluorescence, Congo-red staining and fluorescence, Sirius-red staining, and Congo- or Sirius-red birefringence) were applied in 25 cases of amyloidosis of various types and 47 pseudo-amyloid lesions. The results were compared and were correlated with those of ancillary histochemical tests and clinico-patho...
متن کاملPositive staining with Congo red in tissues with heat artifact due to cautery.
Congo red staining is rarely the source of false positives for amyloid. On the other hand, the heat artifact due to cautery in surgical specimens adopts some hyaline features, which can mimic amyloid deposits many times. Therefore, we decided to investigate the behavior of these artifacted areas with some of the ancillary techniques that are commonly used when diagnosing amyloidosis: Congo red ...
متن کامل[Hyperpigmented axillary papules].
A punch biopsy of the axillary region was performed for histopathological study, staining with hematoxylin-eosin (Figure 2), periodic acid-Schiff (PAS), and Congo red. The histological findings included papillomatosis, orthokeratotic hyperkeratosis and epidermal acanthosis, focal atrophy of the granular layer, and mild hyperpigmentation of the basal layer of the epidermis. There was a moderate ...
متن کامل