He discovered that Teal'cs genetic code was being rewritten as a result of the alien bug and he would eventually be transformed into one of the bugs. Later, after working on the problem, he believed he needed a sample of the insect's venom, which prompted SG-1 to fetch some from Svoriin. He studied the body of the insect SG-1 recovered. After extracting the venom, he was able to create an anti-venom, which would slow the transformation process and, coupled with a Goa'uld symbiote, would be able to reverse the process. Feeling guilty about informing the NID about Teal'c's condition, he destroyed all the samples of the alien bug in order to stop them learning anymore about it. (SG1: "Bane")