stain may not show positivity, or the expected apple green birefringence may be very difficult to demonstrate due to the small quantities of amyloid present.
Cerebral amyloid angiopathy can be differentiated from CADASIL because it presents in older individuals, and staining with Congo red
is negative in the latter condition.
This dye, which only later became known as Congo red
, was the first of many so-called direct dyes.
Calcofluor and Congo Red
were tested as staining fluorescent chemical markers in 29 wild individuals with a body weight between 212 g and 6,000 g (Table 2).
medium to distinguish between invasive and noninvasive E.
Microscopically, there were amyloid deposits within the walls of both atria (confirmed by Congo red
stains), but these deposits were much more prominent within the left atrial wall (Figure 2).
The thermal stability time determined from congo red
These nodules stain positive with PAS but do not show any reactivity with silver or Congo red
Under polarized light, Congo red
staining showed the characteristic apple-green birefringence of amyloidosis.
solani with 80 [micro]M lebbeckalysin for 4h, Congo red
or SYTOX green was added a final concentration of 50 and 5 [micro]M, respectively.
The Congo red
and yeast mixture must be boiled for a short time and then cooled to room temperature.
stains of the bone marrow biopsy and of the aspirate of abdominal wall fat were negative for amyloidosis.