Highest yield for parasite in case of Kala azar is obtained on:
Bone marrow aspiration
Splenic tap
Peripheral smear
None of the above
Splenic aspiration is one of the most sensitive and widely used procedure and sensitivity may be as high as 95-97%. As a prerequisite for deciding splenic aspiration it is essential to determine prothrombin time and platelet count. If the prothrombin time is more than 5 seconds longer than the control sample and the total platelet count is less than 40000/cu.mm the splenic aspiration is contraindicated. Ref: