Weird Links

According to a paper published in Neuroscience this month, innoculating mice with Mycobacterium vaccae seems to alleviate depression by promoting the production of seratonin in the brain as part of the immune response.

Here's a bonus link to the abstract: Identification of an immune-responsive mesolimbocortical serotonergic system: Potential role in regulation of emotional behavior (Lowry et al 2007).