A doctor on the Citadel is looking for a Cerberus poison tailored to turians. Find a sample of the toxin and deliver it to the Huerta Memorial Hospital.
Walkthrough EditArrae: Ex-Cerberus Scientists in a corner of the main room on top of a box. It looks like a microscope.
After finding the poison return it to the doctor in the Examination Rooms section of the hospital. Upon completion, you will gain 5 Reputation, 30 experience and 1,000 credits. The Turian Sixth Fleet War Asset is also updated.
If you didn't find the poison during the mission it will be available for 1000 credits in the Spectre Requisitions store.