The stain used to detect amyloid is?
Grams stain
Congo red
Oil red O
Reticulin stain
Ans. (b) Congo redRef: Robbin's pathology 9th ed. 1257* In biochemistry and histology, Congo red is used to stain microscopic preparations especially as a cytoplasm and erythrocyte stain.* Apple-green birefringence of Congo red stained preparations under polarized light is indicative for the presence of amyloid fibrils.* Additionally, Congo Red is used in microbiological epidemiology to rapidly identify the presence of virulent serotype 2A ShigellaFlexneri, where the dye binds the bacterium's unique lipopolysaccharide (LPS) structure
Histo Pathology