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
Chandler's endemic index is used in: 
Select and explain. 
A. Dengue hemorrhagic fever, B. Malaria, C. Hookworm infestation, D. Cholera
C: Hookworm infestation
Answer: C: Hookworm infestation 
Explanation: Ans: C (Hookworm infestation) Ref: Textbook of Preventive and Social Medicine, K Park.20th edition, page no. 2/5Explanation:Chandler's endemic index - Hookworm InfestationEndemic index - Chandler worked out an index on the basis of average number of hookworm eggs per gram of faeces for the entire community, as below:Average number of eggs per gram of stools :Below 200 - Hook worm infection is not of much significance200 - 250 - May be regarded as potential danger250 - 300 - Minor public health problem Above 300 - Important public health problemChandler's index is still used in epidemiological studies of hookworm disease and also to assess the benefit of mass deworming program.