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The Pasteur is a terran medical transportation starship. It was assigned to the Confederate Army before the Fall of Tarsonis, where it was present to help evacuate the planet, after which it became part of the Terran Dominion Navy Medical Corps.
The Pasteur is captained by Commander Hunicutt.
As a medical ship, the Pasteur is probably named after Louis Pasteur; the famous biologist who disproved the theory of spontaneous generation in organic matter, leading to major medical advances.