However, negative staining does not differentiate bacteria, one can only determine morphology. 1. Using a flamed inoculating loop, place 2-3 loopfuls of Congo Red in two separate circles on a clean ...

biopsy of labial salivary gland and fine-needle biopsy of the subcutaneous abdominal tissue. These biopsy methods have a high specificity and sensitivity when combined with Congo Red staining and ...