Query: NC_010830:1451887 Candidatus Amoebophilus asiaticus 5a2, complete genome Lineage: Amoebophilus asiaticus; Amoebophilus; Amoebophilaceae; Cytophagales; Bacteroidetes; Bacteria General Information: Candidatus Amoebophilus asiaticus 5a2 is an obligate endosymbiont found in Acanthamoeba sp. TUMSJ-321. This organism is a member of the highly diverse bacterial phylum Bacteroidetes which includes the endosymbiont lineages represented by the sister taxa Candidatus A. asiaticus and Candidatus Cardinium hertigii, a symbiont of arthropods.
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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.