sentences:  "Mycobacterium vaccae" originates from the Ugandan Lang'o District, where locals claimed that a "muddy substance had the power to cure a number of ailments".Research areas being pursued with regard to killed "Mycobacterium vaccae" vaccine include immunotherapy for allergic asthma, cancer, depression, leprosy, psoriasis, dermatitis, eczema and tuberculosis.A research group at Henry Wellcome Laboratories for Integrative Neuroscience and Endocrinology, University of Bristol, Bristol, England, UK has shown that "Mycobacterium vaccae" stimulated a newly discovered group of neurons, increased levels of serotonin and decreased levels of anxiety in mice.