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Subcutaneous challenge with whole heat-killed M. vaccae in M. vaccae-preimmunized mice decreased immobility in the forced swim test measured 12 h following challenge. Abbreviations: (Sal), s.c. preimmunization with saline vehicle. For additional abbreviations, see Fig. 1 legend. #P < 0.05 compared to M. vaccae-preimmunized, saline-challenged control group. *P < 0.01 compared to saline-preimmunized, M. vaccae-challenged control group.
