Query: NC_008700:3692333 Shewanella amazonensis SB2B, complete genome
Lineage: Shewanella amazonensis; Shewanella; Shewanellaceae; Alteromonadales; Proteobacteria; Bacteria
General Information: Isolated from shallow marine deposits (coastal shelf mud) of the Amazon River delta off of the coast of Brazil. Iron-reducing bacterium. This genus includes species that inhabit a wide range of environments and are capable of utilizing a wide variety of electron acceptors during anaerobic respiration including some insoluble metal oxides while using very few carbon sources such as lactate or acetate. This group of organisms have been studied extensively for their electron transport systems. Shewanella amazonensis is capable of anaerobically reducing iron, manganese, and sulfur compounds and may be important to the cycling of these compounds in the environment.
Subject: NC_014039:499233 Propionibacterium acnes SK137 chromosome, complete genome
Lineage: Propionibacterium acnes; Propionibacterium; Propionibacteriaceae; Actinomycetales; Actinobacteria; Bacteria
General Information: This bacterium is the most common gram-positive, non-spore forming, anaerobic rod encountered in clinical specimens. The causative agent of acne, it typically grows as an obligate anaerobe. Some strains are aerotolerant, but still show better growth as an anaerobe. It has the ability to produce propionic acid, as its name suggests. It also has the ability to produce catalase along with indole, nitrate, or both indole and nitrate. Propionibacterium resembles Corynebacterium in morphology and arrangement, but is non-toxigenic. It is a common resident of the pilosebaceous (hair follicle) glands of the human skin. The bacteria release lipases to digest a surplus of the skin oil, sebum, that has been produced. The combination of digestive products (fatty acids) and bacterial antigens stimulates an intense local inflammation that bursts the hair follicle. Since acne is caused in part from an infection, it can be suppressed with topical and oral antibiotics such as clindamycin, erythromycin, or tetracycline.