This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
The most sensitive index for surveillance of malaria transmission is - 
Select and explain. 
A. Spleen rate, B. Parasite density index, C. Infant parasite rate, D. Propoional case rate
C: Infant parasite rate
Answer: C: Infant parasite rate 
Explanation: - infant parasite rate is defined as the percentage of infants below the age of one year showing malaria parasites in their blood films. - It is regarded as the most sensitive index of transmission of malaria in a locality. Reference : Park's textbook of preventive and social medicine, 23rd edition pg no: 261 <\p>