S Asia is ‘worst for snake bites’. bbcnews. November 04, 2008. South Asia has the highest number of casualties from snake bites in the world, a new study suggests.It found that more than 400,000 people a year are poisoned by snake bites worldwide, with 20,000 deaths annually.The research published by the US based Public Library of Science Medicine involved data from 68 countries.India, with its population of over a billion people, accounted for the highest estimated number of bites and deaths for a single country. [ See ]. See original article.