Query: NC_013118:1109610 Brucella microti CCM 4915 chromosome 2, complete genome Lineage: Brucella microti; Brucella; Brucellaceae; Rhizobiales; Proteobacteria; Bacteria General Information: Brucella microti was isolated in 2000 from systemically infected voles in South Moravia, Czech Republic and has been more recently isolated from foxes and apparently free-living in soil in Czech soil. The organism is characterized by rapid growth on standard media and high metabolic activity, which is atypical for Brucella.
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General Information: This strain was isolated in the USA from the soft tick Ornithodoros turicatae. Borrelia turicatae is the causative agent of tick-borne relapsing fever in the southwestern USA. Ticks become infected with Borrelia while feeding on an infected mammal, usually a rodent or squirrel. Borrelia then multiplies rapidly, causing a generalized infection throughout the tick. While feeding, the tick passes the spirochete into a mammalian host through its infectious saliva. Relapsing fever is characterized by period of chills, fever, headache, and malaise, followed by an asymptomatic, followed by another episode of symptoms. The cycle of relapsing is due to changes in the surface proteins of Borrelia, which allow it to avoid detection and removal by the host immune system. This antigenic variation is the result of homologous recombination of silent proteins into an expressed locus, causing partial or complete replacement of one serotype with another. These plasmids carry genes involved in antigenic variation and pathogenicity.