Geobacillus stearothermophilus

Description:
•    Geobacillus stearothermophilus (G. stearothermophilus) is a rod-shaped, Gram-positive bacterium and a member of the division Firmicutes.
•    First identified in 1920 and named Bacillus stearothermophilus; it was reclassified as a member of the genus Geobacillus in 2001.

Interesting Facts:
•    The word Geobacillus means ‘soil or earth’ and ‘small rod’.
•    The bacterium is a thermophile, is widely distributed in soil, hot springs, ocean sediment, and is a cause of spoilage in food products.
•    G. stearothermophilus has an optimal growth temperature of 55°C, although it has been observed to survive temperatures as high as 130°C.
•    Geobacillus bacteria are utilised in the biotechnology industry as sources of thermostable enzymes, as platforms for biofuel production, and as potential components of bioremediation strategies.
•    To date over 60 Geobacillus genomes have been sequenced, mainly to identify genes that could be used in different biotechnological applications.
•    These bacteria have a self-preservation technique – they can form endospores and can remain in this dormant stage for very long periods of time, until conditions for growth are favourable.
•    G. stearothermophilus is used to verify decontamination of many laboratory processes as a biological indicator (BI).

Infection:
•    G. stearothermophilus has not been observed to be pathogenic to any host.
•    G. stearothermophilus has a significant role in the spoilage of food, especially milk and dairy products as it can survive the pasteurization process due to its heat-tolerance.
https://wickhammicro.co.uk/knowledge-and-education/geobacillus-stearothermophilus

Geobacillus stearothermophilus, formerly Bacillus stearothermophilus, NRRL B-1172 (Type Strain) Accession numbers in other collections: 26=ATCC 12980=BCRC 11092=CCM 2062=CCUG 26241=CIP 66.23=DSM 22=IAM 11062=IFO 12550=JCM 2501=KCTC 1665=KCTC 1752=LMG 6939=NBRC 12550=NCFB 1768=NCIB 8923=NCIMB 8923=NCTC 10339=NRS-18=NRS-2025=VKM B-510. Source: Smith, N. R. (USDA, Beltsville, MD) <- Curran, H. C. (USDA); NCA Growth media: Tryptone-Glucose-Yeast Extract Agar (number 1) Optimum growth temperature: 55C Strain images: NRRL_B-1172_1.JPG Comments: 26 is Natl Canners' Assn number; NRS-18 and NRS-2025 are Smith numbers Biosafety Level: 1 Agricultural Research Service (NRRL)Culture Collection - March 13, 2023 https://en.wikipedia.org/wiki/Geobacillus_stearothermophilus#/media/File:Geobacillus_stearothermophilus_NRRL_B-1172_(Type_Strain).jpg

Geobacillus stearothermophilus

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