Query: NC_002973:1877905 Listeria monocytogenes str. 4b F2365, complete genome Lineage: Listeria monocytogenes; Listeria; Listeriaceae; Bacillales; Firmicutes; Bacteria General Information: This strain was isolated in 1985 in California, USA, during an outbreak of listeriosis among patients with AIDS. The strain is of serotype 4b and was isolated from a cheese product that caused the outbreak. This organism, which causes listeriosis, is one of the leading causes of death from food-borne pathogens especially in pregnant women, newborns, the elderly, and immunocompromised individuals. It is found in environments such as decaying vegetable matter, sewage, water, and soil, and it can survive extremes of both temperatures (1-45 degrees C) and salt concentration marking it as an extremely dangerous food-born pathogen, especially on food that is not reheated. This organism is enteroinvasive, and utilizes an actin-based motility system by using a surface protein, ActA, that promotes actin polymerization, to spread intercellularly using the polymerized cytoskeletal protein as a "motor". There are 13 serovars associated with Listeria monocytogenes, and the serovar 4b strains are more commonly associated with invasive disease.
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General Information: This strain probably caused lethal anthrax in chimpanzee Leo in the rainforest of the Tai National Park, Cote d'Ivoire. It belongs to a collection of genetically closely related bacteria, isolated in 2001 and 2002 from deceased wild chimpanzees living in this rain forest area. An autopsy showed symptoms typical of anthrax, but the bacterium isolated was motile, unlike B.anthracis. This organism is a soil-dwelling opportunistic pathogen that causes food poisoning in infected individuals. The rapid onset is characterized by nausea and vomiting while the late onset is characterized by diarrhea and abdominal pain. The emetic disease is caused by a small stable dodecadepsipeptide cerulide whereas the diarrheal disease is caused by a heat labile enterotoxin. Some strains produce a potent cytotoxin that forms a pore in the membrane of eukaryotic cells and causes necrotic enteritis (death of intestinal epithelial cells) while the unique tripartite membrane lytic toxin hemolysin BL contributes to the diarrheal disease and destructive infections of the eye.