- after reading the article by Isbister and Gray in the mja of australia I guess the ulcer on my leg is not a white tail spider. It happened feb 2010 and its now aug 2010. 8 different types of antibiotics have killed off the golden staph (its NEVER been left uncovered, wound care specialists orders!!) now being treated with silver dressings. Although the wound has granulated I feel it beginning to break down again. Is there anyone out there with sugggestions how to treat this rotten thing??