User blog comment:Garhdo/Omega: First thoughts/@comment-4220180-20121128152304/@comment-24174486-20121128192452

"Also, Nyreen's extreme fear of the Adjutants wasn't really properly explained, unless I've missed something."

As mentioned in the Codex (and Mass Effect: Invasion where adjutants first appeared), adjutants can infect other life-forms, transforming them into new adjutants.