It's not just pigs, even snakes, frogs, egrets, birds, bats and most domestic animals are reservoirs of the Japanese Encephalitis, commonly known as 'brain fever,' which has been taking a heavy toll
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/even-snakes-birds-spread-je
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/deccan-chronicle-hyderabad
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health