Query: NC_014212:319815 Meiothermus silvanus DSM 9946 chromosome, complete genome Lineage: Meiothermus silvanus; Meiothermus; Thermaceae; Thermales; Deinococcus-Thermus; Bacteria General Information: Isolation: Hot spring; Country: Portugal; Temp: Thermophile; Temp: 50C; Habitat: Hot spring. An aerobic, thermophilic, nonmotile Gram-negative bacterium isolated from the hot spring located at the end of a 450 m tunnel and from thermal water piped to a spa at Vizela in northern Portugal. M. silvanus is of special interest as it causes colored biofilms in the paper making industry and may thus be of economic importance as a biofouler. M. silvanus has also been detected in the gut of an invasive wood-boring beetle and in seawater adjacent to a Pacillopora meandrina coral colony at Palmyra Atoll.
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General Information: This organism was isolated from the blood of wild rats and from fleas obtained from wild rats. Transmission of these organisms is often through an insect vector. Once in a host, this intracellular pathogen is internalized by an actin-dependent mechanism, and primarily targets endothelial cells, although other cells can be infected. The proliferation of the vascular endothelium (bacillary angiomatosis) is characterisitic of Bartonella infection and results in multiplication of the bacterium's host cells. Infected macrophages are stimulated to release vascular endothelial growth factor (VEGF) and interleukin 1 beta, both of which promote angiogenesis. Endothelial cells are also stimulated to grow and divide by direct contact with bacterial cells. In addition, programmed cell death (apoptosis) of endothelial cells is inhibited, combatting a common mechanism eukaryotic cells use to deal with bacterial infection. Other pathogenicity factors include pili and outer membrane adhesins for attachment to host cells. This organism is genetically related to Bartonella elizabethae which was isolated from a case of endocarditis in a human.