Fig. 2: Increased virulence of spaceflight-exposed S. marcescens is reversible on the ground.

a Graph showing survival of w1118 flies after injection with first subcultures of ground or spaceflight Db11 samples. b Graph showing in vivo growth of Db11 after injection into w1118 flies. There was no significant difference in survival of w1118 flies after injection with first subcultures, nor was there significant difference revealed in the assay for in vivo bacterial growth. Error bars represent one standard error.