The USS Pasteur was an Olympic class Medical Cruiser serving in Starfleet during the 24th century.
USS Pasteur in orbit.
She was preceded in Starfleet by name with a science vessel and a M'Benga class hospital ship. She was named, like her predecessors, for Louis Pasteur.
In 2371 she was serving along the Neutral Zone as part of the First Fleet.
Later that year she transported UFP Envoy Razzoti to Naussica in order to participate in a humanitarian mission. ("Meltdown")
After the Battle of Psellus she arrived in orbit of Psellus III to provide medical care to the new Fedreation Protectorate. ("Armistice Part II")