Anti-zerg nanites

Anti-Zerg nanites are a form of advanced technology in the StarCraft universe. They are used to sever Infested Terrans from the Zerg Swarm and some versions of the technology can even reverse the infestation process.

Terran Experiments
Terran experiments with a captured Zerg Brood resulted in the creation of mutates such as Sistask, a member of Jim Raynor's "Alliance. Nanites were used to keep the mutates' violent impulses in check... barely.

Scientists with the remnants of the Terran Confederacy also conducted similar experiments, using nanites in experiments which restored faculties in Infested Terrans.

Protoss Experiments
The Protoss had devised a "radical nanotech serum" which could reverse the infestation process. Some time after the Zerg won the Battle of Omega, Protoss leader Artanis summoned his Terran ally, Jim Raynor, to help solve a problem. Their old adversary, Alexei Stukov had been resurrected by a Zerg Cerebrate, Kaloth, and had returned to the world of Braxis. Raynor and his small force were given samples of the serum to inject Stukov with, in order to return Stukov to normal. The experiment was a success.