Query: NC_006448:5046 Streptococcus thermophilus LMG 18311, complete genome Lineage: Streptococcus thermophilus; Streptococcus; Streptococcaceae; Lactobacillales; Firmicutes; Bacteria General Information: This strain was isolated from commercial yogurt in 1974 in the United Kingdom. Lactic acid producing bacterium used in cheese and yogert production. Streptococci are Gram-positive, nonmotile, nonsporeforming, catalase-negative cocci that occur in pairs or chains. Members of this genus vary widely in pathogenic potential. Most streptococci are facultative anaerobes, and some are obligate anaerobes. Serologic grouping is based on antigenic differences in cell wall carbohydrates, in cell wall pili-associated protein, and in the polysaccharide capsule in group B streptococci. This organism is a lactic acid bacteria often used as a starter culture for fermented dairy products including yogurt and cheese.
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General Information: This subspecies (IIIa) is usually found associated with reptiles, although contact with infected animals can result in the spread of the organism to humans or animals such as turkeys. This strain was originally isolated from a cornsnake in 1986 in Oregon, USA. Causes enteric infections. This group of Enterobactericiae have pathogenic characteristics and are one of the most common causes of enteric infections (food poisoning) worldwide. They were named after the scientist Dr. Daniel Salmon who isolated the first organism, Salmonella choleraesuis, from the intestine of a pig. The presence of several pathogenicity islands (PAIs) that encode various virulence factors allows Salmonella spp. to colonize and infect host organisms. There are two important PAIs, Salmonella pathogenicity island 1 and 2 (SPI-1 and SPI-2) that encode two different type III secretion systems for the delivery of effector molecules into the host cell that result in internalization of the bacteria which then leads to systemic spread.