16-year-old boy had a flea bite while working in a wheat grain godown. After 4 days he developed fever and had axillary lymphadenopathy. The stain used for smear preparation is ?

• This is a case of plague—Working in godown (rats commonly found) • H/o flea bite, In patient 5 days, fever and lymphadenopathy. • Wayson stain a polychromatic stain-Y. Pestis can be best demonstrated (other is Giemsa) • Bipolar staining or safety pin appearance seen. •Albert stain use for C. diptheriae • Z-N stain use for M. tuberculosis and other acid fast bacteria • Mc Fayden reaction used for B. anthracis