Query: NC_014100:172452 Caulobacter segnis ATCC 21756 chromosome, complete genome
Lineage: Caulobacter segnis; Caulobacter; Caulobacteraceae; Caulobacterales; Proteobacteria; Bacteria
General Information: Isolation: Soil; Temp: Mesophile; Habitat: Fresh water. Caulobacter segnis strain ATCC 21756 is a prostheca-less bacterium belonging to the genus Caulobacter; it was isolated from soil although its habitat is considered to be fresh-water. The absence of a stalk in this genus makes this an interesting bacterium to study.
Subject: NC_012633:276500 Rickettsia africae ESF-5, complete genome
Lineage: Rickettsia africae; Rickettsia; Rickettsiaceae; Rickettsiales; Proteobacteria; Bacteria
General Information: This organism was isolated from a cattle tick, Amblyomma variegatum, collected in Ethiopia. This organism, a member of the spotted fever group of the Rickettsiales, is found in sub-Saharan Africa and the Caribbean. Rickettsia africae causes a flu-like illness, characterized by a mild fever and severe headache, without the skin rash common to other spotted fever group Rickettsia species. Members of this genus, like other Rickettsial organisms such as Neorickettsia and Anaplasma, are obligate intracellular pathogens. In both groups, the bacteria are transmitted via an insect, usually a tick, to a host organism where they target endothelial cells and sometimes macrophages. They attach via an adhesin, rickettsial outer membrane protein A, and are internalized where they persist as cytoplasmically free organisms.