Immunitech Research
From The Stargate Omnipedia
A subsidiary company within Zeditron Industries. Immunitech successfully cloned dozens, if not hundreds, of symbiotes from the original Goa'uld which took over the body of Adrian Conrad. The N.I.D. implanted the duplicated Goa'uld into the population of Steveston, Oregon, in the hopes that the N.I.D. would eventually be able to gain useful technological information from the symbiotes, or a better method to quickly eliminate them.
Immunitech designed the symbiotes with a built-in "kill" switch in the event something disastrous occurred, such as the Goa'uld realizing that they were under surveillance.
KEY EPISODE
Nightwalkers - Carter, Teal'c and Quinn discover a town which has been taken over by Goa'uld symbiotes provided by Immunitech Research.