Query: NC_014109:27500 Candidatus Riesia pediculicola USDA chromosome, complete genome
Lineage: Riesia pediculicola; Riesia; Enterobacteriaceae; Enterobacteriales; Proteobacteria; Bacteria
General Information: Riesia pediculicola is a bacterial symbiont of the human body louse Pediculus humanus. This organism is associated with the stomach disc in the louse and is essential for the survival and growth of the host.
Subject: NC_010556:691498 Exiguobacterium sibiricum 255-15, complete genome
Lineage: Exiguobacterium sibiricum; Exiguobacterium; Bacillales Family XII; Bacillales; Firmicutes; Bacteria
General Information: This organism was isolated from a 2-3 million-year permafrost core in Siberia, Russia and can survive and grow rapidly at low temperatures. Analysis of long-term survival of psychrophilic organisms such as this one may aid understanding of the potential growth of organisms in astrobiology. Exiguobacterium sibiricum is a psychrotolerant organism able to grow at temperatures that range from -6 to 40 degrees C. This organism is also able to survive repeated freeze/thaw cycles which may contribute to its ability to survive in cold environments.