''Brockia lithotrophica'' is a

thermophilic A thermophile is an organism—a type of extremophile—that thrives at relatively high temperatures, between . Many thermophiles are archaea, though they can be bacteria or fungi. Thermophilic eubacteria are suggested to have been among the earl ...

bacterium from the genus of

Brockia ''Brockia'' is a genus of thermophilic bacteria from the family of Thermoanaerobacteraceae, with one known species ('' Brockia lithotrophica''), an obligate anaerobe Obligate anaerobes are microorganisms killed by normal atmospheric concent ...

which has been isolated from a sediment-water mixture from a

hot spring A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma (molten rock) or by circ ...

Uzon Caldera Uzon (russian: Узон) is a 9 by 12 km volcanic caldera located in the eastern part of Kamchatka Peninsula, Russia. Together with the Geyzernaya caldera it hosts the largest geothermal field in the Kamchatka Peninsula. The calderas were ...

Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...

. This bacterium is rod shaped, spore-forming and

obligate anaerobe Obligate anaerobes are microorganisms killed by normal atmospheric concentrations of oxygen (20.95% O2). Oxygen tolerance varies between species, with some species capable of surviving in up to 8% oxygen, while others lose viability in environm ...

. It is

lithoautotroph A lithoautotroph is an organism which derives energy from reactions of reduced compounds of mineral (inorganic) origin. Two types of lithoautotrophs are distinguished by their energy source; photolithoautotrophs derive their energy from light while ...

and grows on a mineral medium with molecular sulfur, thiosulfate or polysulfide; it has optimal growth temperature in the range of for pH 6.5, but it is able to grow between and and pH ranging from 5.5 to 8.5.

References

Bacillota Thermoanaerobacterales Bacteria described in 2013 Thermophiles Anaerobes Lithoautotrophs {{Firmicutes-stub