This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Most sensitive method for detecting low density microfilaraemia 
Select and explain. 
A. Mass blood survey, B. DEC Provocation test, C. Membrane filter concentration method, D. Xenodiagnosis
C: Membrane filter concentration method
Answer: C: Membrane filter concentration method 
Explanation: None