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
All fo the following statements regarding Dracunculiasis are true except - 
Select and explain. 
A. India has eradicated this disease, B. Niridazole prevents transmission of the disease, C. The disease is limited to tropical and subtropical regions, D. No animal reservoir has been approved
B: Niridazole prevents transmission of the disease
Answer: B: Niridazole prevents transmission of the disease 
Explanation: - drancunculiasis is caused by drancunculus medinensis. - temperature ourable is 25-30degC and will not develop below 19degC. Thus diseases is limited to tropical and subtropical regions. - India was declared free of guineaworm disease and the last case repoed was in July 1996. -reservoir of infection is infected person. Animal reservoir is may exist but not yet proved. - humans are definitive host and Cyclops are the intermediate host. - no drug cures the infection but metronidazole can be used to limit infection. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no :245 <\p>