在這裏，蚊子多的地方才有發病率

http://www.dogs4dogs.com/blog/2009/06/16/heartworm-preventative-options/

Doglover關於預防針的答複
http://bbs.wenxuecity.com/pet/514709.html

所有跟帖： 

• 俺這裏是心絲蟲病的重災區, 蚊子多蟲子多, 每個月都得給Copper用藥, 很無奈~ -凡人一個- ♀ (82 bytes) () 08/18/2012 postreply 11:48:35