Query: NC_007484:2665195 Nitrosococcus oceani ATCC 19707, complete genome
Lineage: Nitrosococcus oceani; Nitrosococcus; Chromatiaceae; Chromatiales; Proteobacteria; Bacteria
General Information: Found in marine or saline environments. Ammonia-oxidizing bacterium. This species, along with Nitrosococcus halophilus, are ammonia-oxidizing bacteria found within the gamma subdivision of Proteobacteria. This organism has two surface layers, and produces a central stack of intracytoplasmic membranes (flattened vesicles).
Subject: NC_010263:167450 Rickettsia rickettsii str. Iowa, complete genome
Lineage: Rickettsia rickettsii; Rickettsia; Rickettsiaceae; Rickettsiales; Proteobacteria; Bacteria
General Information: Causative agent for Rocky Mountain Spotted Fever. This organism was first identified by Dr. Howard Rickets as the causative agent of Rocky Mountain Spotted Fever, which was originally named for its geographic distribution at the time, it is now known to be widespread throughout the North American continent. This bacterium is an obligate intracellular pathogen that infects primarily the vascular endothelium, and occasionally smooth muscle tissue. It is passed to the human host from a tick bite, and the tick acts as both a natural reservoir and a vector for disease transmission. Once the organism is endocytosed by the host cell, it quickly escapes the phagozome, and replicates intracellularly, causing cell death and tissue damage. The disease is characterized by a spotted rash and has a high mortality rate if left untreated.