Rats injected with a beneficial bacterium were exposed to a stressor, and the immunized animals showed lower levels of a stress-induced protein. The findings, if replicated in clinical trials, could lead to new probiotic-based immunizations to protect people against PTSD, anxiety or depression.

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Rats injected with a beneficial bacterium were exposed to a stressor, and the immunized animals showed lower levels of a stress-induced protein. The findings, if replicated in clinical trials, could lead to new probiotic-based immunizations to protect people against PTSD, anxiety or depression.