Query: NC_008783:671349 Bartonella bacilliformis KC583, complete genome
Lineage: Bartonella bacilliformis; Bartonella; Bartonellaceae; Rhizobiales; Proteobacteria; Bacteria
General Information: Cauative agent of Carrion's disease. Like other members of this genus, Bartonella bacilliformis is an obligate intracellular parasite, which infects red blood cells. Bartonella bacilliformis is the causative agent of Carrion's disease, also called Oroya fever. This disease is found in the western Andes of South America, and is transmitted through an insect vector. Carrion's disease is characterized by an acute, febrile, anemia with a mortality of 40 to 90%. The anemic phase may be followed by a milder secondary episode, characterized by wart-like skin lesions.
Subject: NC_011528:386417 Coxiella burnetii CbuK_Q154, complete genome
Lineage: Coxiella burnetii; Coxiella; Coxiellaceae; Legionellales; Proteobacteria; Bacteria
General Information: Coxiella burnetii K Q154 was isolated from a patient with endocarditis and contains the plasmid QpRS. This organism is widely distributed in nature and can cause infections in reptiles, birds, and mammals. It causes Q fever, or 'query' fever, an atypical pneumonia first associated with abattoir workers in Australia. Transmission may be through insect vectors such as ticks that have bitten an infected wild or domesticated animal, or through an aerosol produced by domesticated animals such as sheep or cattle. The presence of a plasmid is believed to be associated with virulence and pathogenicity, however C. burnetii isolates containing plasmid QpDG are avirulent in guinea pigs and plasmidless isolates have been associated with endocarditis in humans. Coxiella burnetii has a developmental life cycle, and can grow vegetatively through binary fission, or asymmetrically and produce a spore-like cell. The spore-like cell may enable the organism to exist extracellularly for small amounts of time. This bacterium is an obligate intracellular pathogen. It is endocytosed by a host cell, a macrophage for example, and lives and replicates inside the phagolysozome, a unique property of this organism. The genome encodes proteins that have a higher than average pI, which may enable adaptation to the acidic environment of the phagolysozome. The chromosome also contains genes for a number of detoxification and stress response proteins such as dismutases that allow growth in the oxidative environment. The type IV system is similar to the one found in Legionella, which may be important for intracellular survival. This organism produces numerous ankyrin-repeat proteins that may be involved in interactions with the host cell. The genome has 83 pseudogenes, which may be a result of the typical genome-wide degradation observed with other intracellular organisms and also has a group I intron in the 23S ribosomal RNA gene.