Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
A pathogenic prionic organism (PPO) is an organism of terran design.
PPOs were used to infect hydralisks as part of Project Tamed. The PPOs 'tricked' their hosts into growing a new cerebral lobe. This allowed the hydralisks to supposedly be controlled by their overseer. In reality, the control was ineffective, and the hydralisks remained under the control of the Queen of Blades.