Charles Kawalsky's Goa'uld

The Symbiont is a Goa'uld infant who inserted itself in Major Kawalsky.

Infiltrating Kawalsky
When a prisoner of Apophis shot down a Jaffa the Symbiont saw no other alternative to take Major Kawalsky as its host. The symbiont first showed up when Kawalsky needed to be examind by Dr.Nimzicki who discovered the Goa'uld. When the symbiote realized it's identity had been discovered, it killed Nimzicki and hid the body. His corpse was found by Daniel Jackson in one of the quarters. After it killed Nimzicki it went watching to the Stargate. After an Order of Hammond to be examind again it tried to kill Dr.William Warner because he found the Symbiont two but it ran away when the Dr. turned on the alarm. It made his way to the control room and was dialing for Chulak.Major Carter stopped him and was injured that way. Hammond ordered Dr.Warner to remove the Symbiont from kawalsky. After almost 2 hours of surgerie it was removed but not before blending with Kawalsky. It wanted a meeting with Teal'c and when he arrived he send away the 2 guards and attacked Teal'c. After that he made his way into the control room and dialed Chulak again. When he wanted to enter the Stargate he was attacked by Teal'c who killed him by holding its head inside the Event-Horizon of a closing Stargate.