Query: NC_011988:1036618 Agrobacterium vitis S4 chromosome 2, complete genome
Lineage: Agrobacterium vitis; Agrobacterium; Rhizobiaceae; Rhizobiales; Proteobacteria; Bacteria
General Information: Agrobacterium vitis is the causative agent of crown gall disease in grapes. Agrobacterium are Gram-negative, motile, soil-dwelling plant pathogens with the species name given based on the disease phenotype associated with the bacteria. Disease causing Agrobacterium spp. possess a tumor-inducing (Ti) plasmid, which carries genes for the formation of opines. A segment of the Ti plasmid gets transferred to the plant cell and integrates into the host cell genome. The plant cell then starts synthesizing opines, which can be catabolized by Agrobacterium spp, but not by the plant cells.
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.