Query: NC_008346:410940 Syntrophomonas wolfei subsp. wolfei str. Goettingen, complete Lineage: Syntrophomonas wolfei; Syntrophomonas; Syntrophomonadaceae; Clostridiales; Firmicutes; Bacteria General Information: Syntrophomonas wolfeisubsp. wolfei str. Goettingen (DSM 2245B) was isolated from anaerobic digestor sludge. Fatty acid-oxidizing bacterium. This organism is an anaerobic syntrophic fatty acid-oxidizing bacterium. It is the only bacterium known to produce energy from anaerobic degradation of saturated four to eight carbon fatty acids with protons serving as the electron acceptor. The cells have an unusual multilayered gram-negative cell wall. Syntrophomonas wolfei grows in coculture with Methanospirillum hungatei and can be isolated from anaerobic environments such as aquatic sediment or sewage digestor sludge.
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General Information: This strain is the epidemic type X variant that has been extensively studied in research and clinical laboratories. It produces both toxin A, and B. Causative agent of pseudomembranous colitis. This genus comprises about 150 metabolically diverse species of anaerobes that are ubiquitous in virtually all anoxic habitats where organic compounds are present, including soils, aquatic sediments and the intestinal tracts of animals and humans. This shape is attributed to the presence of endospores that develop under conditions unfavorable for vegetative growth and distend single cells terminally or sub-terminally. Spores germinate under conditions favorable for vegetative growth, such as anaerobiosis and presence of organic substrates. It is believed that present day Mollicutes (Eubacteria) have evolved regressively (i.e., by genome reduction) from gram-positive clostridia-like ancestors with a low GC content in DNA. Some species are capable of producing organic solvents (acetone, ethanol, etc,), molecular hydrogen and other useful compounds. This species is now recognized as the major causative agent of pseudomembranous colitis (inflammation of the colon) and diarrhea that may occur following antibiotic treatment. This bacterium causes a wide spectrum of disease, ranging from mild, self-limiting diarrhea to serious diarrhea and, in some cases, complications such as pseudomembrane formation, toxic megacolon (dilation of the colon) and peritonitis, which often lead to lethality among patients. The bacteria produce high molecular mass polypeptide cytotoxins, A and B. Some strains produce only one of the toxins, others produce both. Toxin A causes inflammatory reaction involving hypersecretion of fluid and hemorrhagic necrosis through triggering cytokine release by neutrophils. Alteration of intestinal microbial balance with antibiotic therapy and increased exposure to the bacterium in a hospital setting allows C. difficile to colonize susceptible individuals. Moreover, it has been shown that subinhibitory concentrations of antibiotics promote increased toxin production by C. difficile.