S133-E-006036 (25 Feb. 2011) --- Astronaut Michael Barratt, STS-133 mission specialist, works with the Microbe Group Activation Pack containing eight Fluid Processing Apparatuses on the middeck of space shuttle Discovery while en route to a rendezvous with the International Space Station. A previous set of similar tests made a key discovery about the mechanism that makes salmonella more infectious, aiding the fight against food poisoning on Earth.

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