Read the finding
Non-clinical sciences · Pattern recognition
Which special stain detects this target
5 findings. Cover the answers and work down the list — then flip it and predict the finding from the diagnosis.
Acid-fast bacilli (TB, leprosy)Ziehl–Neelsen
Amyloid (apple-green birefringence in polarised light)Congo red
Glycogen, fungi and basement membranesPeriodic acid–Schiff (PAS)
Iron (haemosiderin)Perls' Prussian blue
Spirochaetes (syphilis) and H. pyloriWarthin–Starry silver