Lieutenant Commander Hester Dealt was the medical trustee of the Federation Medical Collection Station on 'aucdet IX.
In 2365, the USS Enterprise-D was dispatched to the station on 'aucdet IX to retrieve specimens of plasma plague for transfer to Science Station Tango Sierra.
After the approval of the containment module built by Lieutenant Geordi La Forge, the new Enterprise-D chief engineer, the specimens were transferred into the containment unit. During transport to Tango Sierra, Hester Dealt had the task of continually monitoring the specimens for signs of growth. (TNG: "The Child")