Source:http://linkedlifedata.com/resource/umls/id/C0035591
MSH: A family of small, gram-negative organisms, often parasitic in humans and other animals, causing diseases that may be transmitted by invertebrate vectors.,NCI: A taxonomic family of Gram negative, non acid fast bacterium in the phylum Proteobacteria that includes the genera Rickettsia and Wolbachia, among others.