A person working in an abattoir presented with a papule on hand, which turned into an ulcer. Which will best help in diagnosis?
A. Trichrome Methylene Blue
B. Carbol Fuschin
C. Acid Fast Stain
D. Calcoflour White
Correct answer : A. Trichrome Methylene Blue
The clinical features are suggestive of cutaneous anthrax. Trichrome methylene blue is used to demonstrate McFadyean’s reaction which is characteristic of Bacillus anthracis.